Cold Start Problem 2005 V70

[jxkeefe]

I am experiencing a cold start issue which I first noticed late last winter and thought I might get help here. The car is 2005 Volvo V70. The engine is a B5244S6 - 2.4 Liter - nonturbo.

The problem went away in the hot weather. It seems to have reappeared the last few days due to colder (high 40's) overnight temperatures. The problem occurs when the engine is first started from cold overnight. The engine appears to run very lean - surging RPM and, after I put car into drive gear, I must use throttle to keep it going. This lasts for only a minute or so after which the engine proceeds to run normally. I cannot reproduce the issue until the next morning. The colder it is overnight, the longer the problem lasts on the cold start in the morning. If one allows the engine to warm up without putting it in gear, it will run with RPM surging between about 800 and 1700 RPM for about a minute or so and is then fine. No stored or pending codes are set. I cannot reproduce the problem unless the car has sat overnight.

I have checked the temp sensor and it is O.K.. I do not think this engine has pulse air. I did check for vacuum leaks but the issue goes away very quickly - one minute or so.

I connected my Actron CP9180 scan tool (can't afford VIDA test equipment) and recorded data frames from startup. The scan tool takes a snapshot about every seven seconds. Here is the data I get - the first frame is just before I start the engine with RPM 0:

Recorded Data
MIL STATUS($10) ON
MIL STATUS($18) OFF
ABSLT TPS($10) 17.6
ENG SPEED($10) 0
ENG SPEED($18) 0
BARO PRS($10) 102
CALC LOAD($10) 75.6
MAF FLOW($10) 0.00
MAP($10) 102
OUT TEMP($10) 51
OUT TEMP($18) 51
COOLANT($10) 62
COOLANT($18) 62
IAT($10) 60
IGN ADVANCE($1 0.0
ST FTRM1($10) 0.0
LT FTRM1($10) 1.5
VEH SPEED($10) 0
VEH SPEED($18) 0
ABSLT LOAD($10 12.0
FUEL PRESS($10) 267
FUEL SYS 1($10) OPEN
FUEL SYS 2($10) N/A
REL TPS($10) 18.4
THROT CMD($10) 17.2
ABS TPS B($10) 34.1
ABS TPS C($10) 71.3
ACC POS D($10) 7.0
ACC POS E($10) 7.4
CAT TEMP11($10) 53
EVAP PURGE($10 0.0
CMD EQ RATIO($ 1.000
O2S12($10) 0.000
ST FTRM12($10) 0.0
EQ RATIO11($10 0.999
O2S11($10) 0.499
CLR DIST($10) ---
CLR DIST($18) 237
CLR TRPS($10) 4096
CLR TRPS($18) 5888
MIL DIST($10) 16
MIL DIST($18) 0
FUEL LEVEL($10 65.4
VPWR($10) 11.562
VPWR($18) 11.200
ENG RUN($10) 00:02
ENG RUN($18) 01:54
OBD2 STAT($10) CA
OBD2 STAT($1EU/CA/US
Frame 2 Time 13.9

MIL STATUS ON
MIL STATUS OFF
ABSLT TPS % 12.9
ENG SPEED RPM 898
ENG SPEED RPM 860
BARO PRS KPA 102
CALC LOAD % 75.6
MAF FLOW GR/SE 10.60 <---- Hi MAF value for engine RPM
MAP KPA 89
OUT TEMP F 51
OUT TEMP F 51
COOLANT F 62
COOLANT F 62
IAT F 59
IGN ADVANCE DE -13.6
ST FTRM1 % 0.0
LT FTRM1 % 5.4
VEH SPEED MPH 0
VEH SPEED MPH 0
ABSLT LOAD % 13.0
FUEL PRESS KPAG 390
FUEL SYS 1 OPEN
FUEL SYS 2 N/A
REL TPS % 25.8
THROT CMD % 26.2
ABS TPS B % 43.5
ABS TPS C % 83.9
ACC POS D % 25.8
ACC POS E % 26.6
CAT TEMP11 F 154
EVAP PURGE % 0.0
CMD EQ RATIO 0.994
O2S12 V 0.000
ST FTRM12 % 0.0
EQ RATIO11 0.949
O2S11 mA 199.483
CLR DIST($10) ---
CLR DIST mi 237
CLR TRPS 4096
CLR TRPS 5888
MIL DIST mi 16
MIL DIST mi 0
FUEL LEVEL % 63.5
VPWR V 13.984
VPWR V 13.600
ENG RUN m:s 00:09
ENG RUN m:s 02:01
OBD2 STAT CA
OBD2 STAT EU/CA/US
Frame 3 Time 20.8

MIL STATUS($10) ON
MIL STATUS($18) OFF
ABSLT TPS($10) 38.4
ENG SPEED($10) 1251
ENG SPEED($18) 1278
BARO PRS($10) 102
CALC LOAD($10) 95.2
MAF FLOW($10) 17.41 <---- Hi MAF value
MAP($10) 89
OUT TEMP($10) 51
OUT TEMP($18) 51
COOLANT($10) 62
COOLANT($18) 62
IAT($10) 60
IGN ADVANCE($1 -20.6
ST FTRM1($10) 0.0
LT FTRM1($10) 5.4
VEH SPEED($10) 0
VEH SPEED($18) 0
ABSLT LOAD($10 15.0
FUEL PRESS($10) 372
FUEL SYS 1($10) OPEN
FUEL SYS 2($10) N/A
REL TPS($10) 40.0
THROT CMD($10) 29.4
ABS TPS B($10) 44.7
ABS TPS C($10) 81.9
ACC POS D($10) 25.8
ACC POS E($10) 26.6
CAT TEMP11($10) 506
EVAP PURGE($10 0.0
CMD EQ RATIO($ 0.994
O2S12($10) 0.000
ST FTRM12($10) 0.0
EQ RATIO11($10 0.827
O2S11($10) 162.481
CLR DIST($10) ---
CLR DIST($18) 237
CLR TRPS($10) 4096
CLR TRPS($18) 5888
MIL DIST($10) 16
MIL DIST($18) 0
FUEL LEVEL($10 75.6
VPWR($10) 13.417
VPWR($18) 13.600
ENG RUN($10) 00:16
ENG RUN($18) 02:08
OBD2 STAT($10) CA
OBD2 STAT($1EU/CA/US
Frame 4 Time 27.7

MIL STATUS ON
MIL STATUS OFF
ABSLT TPS % 32.5
ENG SPEED RPM 1208
ENG SPEED RPM 1177
BARO PRS KPA 102
CALC LOAD % 98.8
MAF FLOW GR/SE 21.68 <---- Hi MAF value
MAP KPA 100
OUT TEMP F 51
OUT TEMP F 51
COOLANT F 64
COOLANT F 64
IAT F 60
IGN ADVANCE DE -19.1
ST FTRM1 % 0.0
LT FTRM1 % 5.4
VEH SPEED MPH 1
VEH SPEED MPH 1
ABSLT LOAD % 14.0
FUEL PRESS KPAG 366
FUEL SYS 1 OPEN
FUEL SYS 2 N/A
REL TPS % 43.9
THROT CMD % 45.4
ABS TPS B % 65.0
ABS TPS C % 100.0
ACC POS D % 34.5
ACC POS E % 34.5
CAT TEMP11 F 866
EVAP PURGE % 0.0
CMD EQ RATIO 0.994
O2S12 V 0.000
ST FTRM12 % 0.0
EQ RATIO11 0.827
O2S11 mA 162.481
CLR DIST($10) ---
CLR DIST mi 237
CLR TRPS 4096
CLR TRPS 5888
MIL DIST mi 16
MIL DIST mi 0
FUEL LEVEL % 43.5
VPWR V 14.003
VPWR V 13.300
ENG RUN m:s 00:22
ENG RUN m:s 02:15
OBD2 STAT CA
OBD2 STAT EU/CA/US
Frame 5 Time 34.5

MIL STATUS($10) ON
MIL STATUS($18) OFF
ABSLT TPS($10) 9.4
ENG SPEED($10) 1555
ENG SPEED($18) 1486
BARO PRS($10) 102
CALC LOAD($10) 64.3
MAF FLOW($10) 31.47 <----- Hi MAF value
MAP($10) 98
OUT TEMP($10) 51
OUT TEMP($18) 51
COOLANT($10) 68
COOLANT($18) 68
IAT($10) 60
IGN ADVANCE($1 6.5
ST FTRM1($10) -9.2
LT FTRM1($10) 3.1
VEH SPEED($10) 6
VEH SPEED($18) 6
ABSLT LOAD($10 9.0
FUEL PRESS($10) 369
FUEL SYS 1($10) CLSD
FUEL SYS 2($10) N/A
REL TPS($10) 18.4
THROT CMD($10) 20.3
ABS TPS B($10) 37.2
ABS TPS C($10) 73.7
ACC POS D($10) 23.1
ACC POS E($10) 22.7
CAT TEMP11($10) 1340
EVAP PURGE($10 0.0
CMD EQ RATIO($ 0.994
O2S12($10) 0.000
ST FTRM12($10) 0.0
EQ RATIO11($10 0.827
O2S11($10) 162.481
CLR DIST($10) ---
CLR DIST($18) 237
CLR TRPS($10) 4096
CLR TRPS($18) 5888
MIL DIST($10) 16
MIL DIST($18) 0
FUEL LEVEL($10 86.2
VPWR($10) 13.964
VPWR($18) 13.600
ENG RUN($10) 00:29
ENG RUN($18) 02:22
OBD2 STAT($10) CA
OBD2 STAT($1EU/CA/US
Frame 6 Time 41.4

MIL STATUS ON
MIL STATUS OFF
ABSLT TPS % 12.1
ENG SPEED RPM 1666
ENG SPEED RPM 1655
BARO PRS KPA 103
CALC LOAD % 51.3
MAF FLOW GR/SE 20.84 <----- Hi MAF value
MAP KPA 65
OUT TEMP F 51
OUT TEMP F 53
COOLANT F 69
COOLANT F 69
IAT F 62
IGN ADVANCE DE 18.0
ST FTRM1 % -5.1
LT FTRM1 % 3.9
VEH SPEED MPH 13
VEH SPEED MPH 14
ABSLT LOAD % 9.0
FUEL PRESS KPAG 384
FUEL SYS 1 CLSD
FUEL SYS 2 N/A
REL TPS % 12.1
THROT CMD % 12.5
ABS TPS B % 29.4
ABS TPS C % 66.6
ACC POS D % 18.8
ACC POS E % 19.2
CAT TEMP11 F 1447
EVAP PURGE % 0.0
CMD EQ RATIO 0.994
O2S12 V 0.000
ST FTRM12 % 0.0
EQ RATIO11 0.827
O2S11 mA 49.492
CLR DIST($10) ---
CLR DIST mi 237
CLR TRPS 4096
CLR TRPS 5888
MIL DIST mi 16
MIL DIST mi 0
FUEL LEVEL % 82.7
VPWR V 13.828
VPWR V 13.500
ENG RUN m:s 00:36
ENG RUN m:s 02:29
OBD2 STAT CA
OBD2 STAT EU/CA/US
Frame 7 Time 48.2

MIL STATUS($10) ON
MIL STATUS($18) OFF
ABSLT TPS($10) 15.2
ENG SPEED($10) 1764
ENG SPEED($18) 1763
BARO PRS($10) 102
CALC LOAD($10) 64.7
MAF FLOW($10) 25.61 <--- Hi MAF value
MAP($10) 74
OUT TEMP($10) 51
OUT TEMP($18) 53
COOLANT($10) 73
COOLANT($18) 73
IAT($10) 64
IGN ADVANCE($1 10.5
ST FTRM1($10) -16.1
LT FTRM1($10) 4.6
VEH SPEED($10) 17
VEH SPEED($18) 18
ABSLT LOAD($10 12.0
FUEL PRESS($10) 381
FUEL SYS 1($10) CLSD
FUEL SYS 2($10) N/A
REL TPS($10) 14.1
THROT CMD($10) 14.9
ABS TPS B($10) 31.7
ABS TPS C($10) 69.0
ACC POS D($10) 20.7
ACC POS E($10) 19.6
CAT TEMP11($10) 1460
EVAP PURGE($10 0.0
CMD EQ RATIO($ 0.994
O2S12($10) 0.000
ST FTRM12($10) 0.0
EQ RATIO11($10 0.936
O2S11($10) 196.483
CLR DIST($10) ---
CLR DIST($18) 237
CLR TRPS($10) 4096
CLR TRPS($18) 5888
MIL DIST($10) 16
MIL DIST($18) 0
FUEL LEVEL($10 82.7
VPWR($10) 13.847
VPWR($18) 13.400
ENG RUN($10) 00:43
ENG RUN($18) 02:35
OBD2 STAT($10) CA
OBD2 STAT($1EU/CA/US
Frame 8 Time 55.1

MIL STATUS ON
MIL STATUS OFF
ABSLT TPS % 13.3
ENG SPEED RPM 1715
ENG SPEED RPM 1714
BARO PRS KPA 102
CALC LOAD % 47.0
MAF FLOW GR/SE 16.45 <--- Hi MAF value
MAP KPA 60
OUT TEMP F 51
OUT TEMP F 51
COOLANT F 78
COOLANT F 78
IAT F 68
IGN ADVANCE DE 21.0
ST FTRM1 % -22.9
LT FTRM1 % 3.9
VEH SPEED MPH 16
VEH SPEED MPH 16
ABSLT LOAD % 9.0
FUEL PRESS KPAG 384
FUEL SYS 1 CLSD
FUEL SYS 2 N/A
REL TPS % 10.9
THROT CMD % 11.7
ABS TPS B % 28.2
ABS TPS C % 64.7
ACC POS D % 15.6
ACC POS E % 16.0
CAT TEMP11 F 1462
EVAP PURGE % 0.0
CMD EQ RATIO 0.994
O2S12 V 0.000
ST FTRM12 % 0.0
EQ RATIO11 0.995
O2S11 mA 238.480
CLR DIST($10) ---
CLR DIST mi 237
CLR TRPS 4096
CLR TRPS 5888
MIL DIST mi 16
MIL DIST mi 0
FUEL LEVEL % 80.0
VPWR V 13.808
VPWR V 13.400
ENG RUN m:s 00:50
ENG RUN m:s 02:43
OBD2 STAT CA
OBD2 STAT EU/CA/US
Frame 9 Time 61.9

MIL STATUS($10) ON
MIL STATUS($18) OFF
ABSLT TPS($10) 7.0
ENG SPEED($10) 1381
ENG SPEED($18) 1382
BARO PRS($10) 102
CALC LOAD($10) 31.7
MAF FLOW($10) 9.13 <--- MAF value getting closer to normal
MAP($10) 47
OUT TEMP($10) 51
OUT TEMP($18) 51
COOLANT($10) 82
COOLANT($18) 82
IAT($10) 68
IGN ADVANCE($1 32.5
ST FTRM1($10) -24.3
LT FTRM1($10) 7.8
VEH SPEED($10) 17
VEH SPEED($18) 16
ABSLT LOAD($10 4.0
FUEL PRESS($10) 381
FUEL SYS 1($10) CLSD
FUEL SYS 2($10) N/A
REL TPS($10) 5.4
THROT CMD($10) 7.0
ABS TPS B($10) 25.0
ABS TPS C($10) 62.3
ACC POS D($10) 16.0
ACC POS E($10) 16.0
CAT TEMP11($10) 1430
EVAP PURGE($10 0.0
CMD EQ RATIO($ 0.994
O2S12($10) 0.120
ST FTRM12($10) 0.0
EQ RATIO11($10 0.985
O2S11($10) 244.480
CLR DIST($10) ---
CLR DIST($18) 237
CLR TRPS($10) 4096
CLR TRPS($18) 5888
MIL DIST($10) 16
MIL DIST($18) 0
FUEL LEVEL($10 27.0
VPWR($10) 13.886
VPWR($18) 13.400
ENG RUN($10) 00:57
ENG RUN($18) 02:50
OBD2 STAT($10) CA
OBD2 STAT($1EU/CA/US
Frame 10 Time 68.8

MIL STATUS ON
MIL STATUS OFF
ABSLT TPS % 8.2
ENG SPEED RPM 1270
ENG SPEED RPM 1257
BARO PRS KPA 102
CALC LOAD % 45.0
MAF FLOW GR/SE 12.57
MAP KPA 71
OUT TEMP F 51
OUT TEMP F 51
COOLANT F 86
COOLANT F 86
IAT F 68
IGN ADVANCE DE 16.5
ST FTRM1 % -23.1
LT FTRM1 % 3.9
VEH SPEED MPH 11
VEH SPEED MPH 11
ABSLT LOAD % 9.0
FUEL PRESS KPAG 375
FUEL SYS 1 CLSD
FUEL SYS 2 N/A
REL TPS % 13.7
THROT CMD % 14.1
ABS TPS B % 30.9
ABS TPS C % 67.8
ACC POS D % 20.0
ACC POS E % 20.7
CAT TEMP11 F 1350
EVAP PURGE % 0.0
CMD EQ RATIO 0.994
O2S12 V 0.720
ST FTRM12 % 0.0
EQ RATIO11 1.013
O2S11 mA 252.479
CLR DIST($10) ---
CLR DIST mi 237
CLR TRPS 4096
CLR TRPS 5888
MIL DIST mi 16
MIL DIST mi 0
FUEL LEVEL % 89.8
VPWR V 14.023
VPWR V 13.500
ENG RUN m:s 01:04
ENG RUN m:s 02:57
OBD2 STAT CA
OBD2 STAT EU/CA/US
Frame 11 Time 75.7

MIL STATUS($10) ON
MIL STATUS($18) OFF
ABSLT TPS($10) 15.2
ENG SPEED($10) 1648
ENG SPEED($18) 1650
BARO PRS($10) 102
CALC LOAD($10) 55.6
MAF FLOW($10) 19.83
MAP($10) 67
OUT TEMP($10) 51
OUT TEMP($18) 51
COOLANT($10) 91
COOLANT($18) 91
IAT($10) 71
IGN ADVANCE($1 11.0
ST FTRM1($10) -23.1
LT FTRM1($10) 4.6
VEH SPEED($10) 14
VEH SPEED($18) 14
ABSLT LOAD($10 10.0
FUEL PRESS($10) 375
FUEL SYS 1($10) CLSD
FUEL SYS 2($10) N/A
REL TPS($10) 10.9
THROT CMD($10) 11.3
ABS TPS B($10) 28.2
ABS TPS C($10) 64.3
ACC POS D($10) 16.4
ACC POS E($10) 16.0
CAT TEMP11($10) 1371
EVAP PURGE($10 0.0
CMD EQ RATIO($ 0.994
O2S12($10) 0.850
ST FTRM12($10) 0.0
EQ RATIO11($10 0.983
O2S11($10) 10.499
CLR DIST($10) ---
CLR DIST($18) 237
CLR TRPS($10) 4096
CLR TRPS($18) 5888
MIL DIST($10) 16
MIL DIST($18) 0
FUEL LEVEL($10 81.1
VPWR($10) 13.906
VPWR($18) 13.400
ENG RUN($10) 01:11
ENG RUN($18) 03:04
OBD2 STAT($10) CA
OBD2 STAT($1EU/CA/US
Frame 12 Time 82.5

MIL STATUS ON
MIL STATUS OFF
ABSLT TPS % 8.6
ENG SPEED RPM 1452
ENG SPEED RPM 1451
BARO PRS KPA 102
CALC LOAD % 40.7
MAF FLOW GR/SE 13.04
MAP KPA 57
OUT TEMP F 51
OUT TEMP F 51
COOLANT F 95
COOLANT F 95
IAT F 73
IGN ADVANCE DE 32.0
ST FTRM1 % -15.9
LT FTRM1 % 3.1
VEH SPEED MPH 18
VEH SPEED MPH 18
ABSLT LOAD % 5.0
FUEL PRESS KPAG 378
FUEL SYS 1 CLSD
FUEL SYS 2 N/A
REL TPS % 5.4
THROT CMD % 6.2
ABS TPS B % 23.5
ABS TPS C % 60.3
ACC POS D % 14.5
ACC POS E % 15.2
CAT TEMP11 F 1379
EVAP PURGE % 0.0
CMD EQ RATIO 0.994
O2S12 V 0.860
ST FTRM12 % 0.0
EQ RATIO11 0.984
O2S11 mA 2.499
CLR DIST($10) ---
CLR DIST mi 237
CLR TRPS 4096
CLR TRPS 5888
MIL DIST mi 16
MIL DIST mi 0
FUEL LEVEL % 68.2
VPWR V 13.984
VPWR V 13.600
ENG RUN m:s 01:18
ENG RUN m:s 03:11
OBD2 STAT CA
OBD2 STAT EU/CA/US
Frame 13 Time 89.4
############################################################################
My scan tool will only catch up to frame 13. I edited out the first few frames because that was data before I started the engine.

Here is a few frames of data from the scan tool with the engine running normally warming up at idle well past the period when the issue occurs:

Recorded Data

MIL STATUS OFF
MIL STATUS OFF
ABSLT TPS % 2.3
ENG SPEED RPM 770
ENG SPEED RPM 769
BARO PRS KPA 102
CALC LOAD % 21.9
MAF FLOW GR/SE 3.08 <---- Normal MAF signal for this engine RPM
MAP KPA 34
OUT TEMP F 71
OUT TEMP F 75
COOLANT F 165
COOLANT F 165
IAT F 109
IGN ADVANCE DE 12.0
ST FTRM1 % 1.5
LT FTRM1 % 7.0
VEH SPEED MPH 0
VEH SPEED MPH 0
ABSLT LOAD % 3.0
FUEL PRESS KPAG 381
FUEL SYS 1 CLSD
FUEL SYS 2 N/A
REL TPS % 1.9
THROT CMD % 2.7
ABS TPS B % 19.6
ABS TPS C % 56.4
ACC POS D % 7.0
ACC POS E % 7.4
CAT TEMP11 F 978
EVAP PURGE % 8.6
CMD EQ RATIO 1.000
O2S12 V 0.835
ST FTRM12 % 0.0
EQ RATIO11 0.996
O2S11 mA 254.479
CLR DIST($10) ---
CLR DIST mi 201
CLR TRPS 3840
CLR TRPS 5120
MIL DIST mi 41
MIL DIST mi 0
FUEL LEVEL % 76.0
VPWR V 13.769
VPWR V 13.300
ENG RUN m:s 01:54
ENG RUN m:s 01:57
OBD2 STAT CA
OBD2 STAT EU/CA/US
Frame -5 Time -34.2

MIL STATUS($10) OFF
MIL STATUS($18) OFF
ABSLT TPS($10) 2.3
ENG SPEED($10) 758
ENG SPEED($18) 761
BARO PRS($10) 102
CALC LOAD($10) 21.9
MAF FLOW($10) 3.37 <---- normal MAF signal for this engine RPM
MAP($10) 34
OUT TEMP($10) 71
OUT TEMP($18) 75
COOLANT($10) 165
COOLANT($18) 165
IAT($10) 109
IGN ADVANCE($1 12.0
ST FTRM1($10) 0.7
LT FTRM1($10) 6.2
VEH SPEED($10) 0
VEH SPEED($18) 0
ABSLT LOAD($10 3.0
FUEL PRESS($10) 378
FUEL SYS 1($10) CLSD
FUEL SYS 2($10) N/A
REL TPS($10) 1.9
THROT CMD($10) 2.7
ABS TPS B($10) 19.6
ABS TPS C($10) 56.4
ACC POS D($10) 7.0
ACC POS E($10) 7.4
CAT TEMP11($10) 977
EVAP PURGE($10 8.6
CMD EQ RATIO($ 1.000
O2S12($10) 0.830
ST FTRM12($10) 0.0
EQ RATIO11($10 0.991
O2S11($10) 247.480
CLR DIST($10) ---
CLR DIST($18) 201
CLR TRPS($10) 3840
CLR TRPS($18) 5120
MIL DIST($10) 41
MIL DIST($18) 0
FUEL LEVEL($10 76.0
VPWR($10) 13.769
VPWR($18) 13.200
ENG RUN($10) 02:01
ENG RUN($18) 02:04
OBD2 STAT($10) CA
OBD2 STAT($1EU/CA/US
Frame -4 Time -27.4

MIL STATUS OFF
MIL STATUS OFF
ABSLT TPS % 2.3
ENG SPEED RPM 775
ENG SPEED RPM 773
BARO PRS KPA 102
CALC LOAD % 21.9
MAF FLOW GR/SE 3.47 <---- Normal MAF signal for this engine RPM
MAP KPA 34
OUT TEMP F 71
OUT TEMP F 73
COOLANT F 167
COOLANT F 167
IAT F 109
IGN ADVANCE DE 13.0
ST FTRM1 % 0.8
LT FTRM1 % 6.2
VEH SPEED MPH 0
VEH SPEED MPH 0
ABSLT LOAD % 3.0
FUEL PRESS KPAG 378
FUEL SYS 1 CLSD
FUEL SYS 2 N/A
REL TPS % 1.9
THROT CMD % 2.7
ABS TPS B % 19.6
ABS TPS C % 56.4
ACC POS D % 7.0
ACC POS E % 7.4
CAT TEMP11 F 977
EVAP PURGE % 8.6
CMD EQ RATIO 1.000
O2S12 V 0.825
ST FTRM12 % 0.0
EQ RATIO11 0.996
O2S11 mA 253.479
CLR DIST($10) ---
CLR DIST mi 201
CLR TRPS 3840
CLR TRPS 5120
MIL DIST mi 41
MIL DIST mi 0
FUEL LEVEL % 76.0
VPWR V 13.789
VPWR V 13.100
ENG RUN m:s 02:08
ENG RUN m:s 02:11
OBD2 STAT CA
OBD2 STAT EU/CA/US
Frame -3 Time -20.6

MIL STATUS($10) OFF
MIL STATUS($18) OFF
ABSLT TPS($10) 2.3
ENG SPEED($10) 765
ENG SPEED($18) 758
BARO PRS($10) 102
CALC LOAD($10) 21.9
MAF FLOW($10) 3.25
MAP($10) 35
OUT TEMP($10) 71
OUT TEMP($18) 75
COOLANT($10) 167
COOLANT($18) 167
IAT($10) 109
IGN ADVANCE($1 11.5
ST FTRM1($10) 0.7
LT FTRM1($10) 6.2
VEH SPEED($10) 0
VEH SPEED($18) 0
ABSLT LOAD($10 3.0
FUEL PRESS($10) 381
FUEL SYS 1($10) CLSD
FUEL SYS 2($10) N/A
REL TPS($10) 1.9
THROT CMD($10) 2.7
ABS TPS B($10) 19.6
ABS TPS C($10) 56.4
ACC POS D($10) 7.0
ACC POS E($10) 7.4
CAT TEMP11($10) 977
EVAP PURGE($10 8.6
CMD EQ RATIO($ 1.000
O2S12($10) 0.820
ST FTRM12($10) 0.0
EQ RATIO11($10 0.999
O2S11($10) 0.499
CLR DIST($10) ---
CLR DIST($18) 201
CLR TRPS($10) 3840
CLR TRPS($18) 5120
MIL DIST($10) 41
MIL DIST($18) 0
FUEL LEVEL($10 76.0
VPWR($10) 13.750
VPWR($18) 13.300
ENG RUN($10) 02:15
ENG RUN($18) 02:18
OBD2 STAT($10) CA
OBD2 STAT($1EU/CA/US
Frame -2 Time -13.7

MIL STATUS OFF
MIL STATUS OFF
ABSLT TPS % 2.3
ENG SPEED RPM 758
ENG SPEED RPM 766
BARO PRS KPA 102
CALC LOAD % 21.9
MAF FLOW GR/SE 3.20
MAP KPA 34
OUT TEMP F 71
OUT TEMP F 75
COOLANT F 167
COOLANT F 167
IAT F 109
IGN ADVANCE DE 11.5
ST FTRM1 % 0.8
LT FTRM1 % 6.2
VEH SPEED MPH 0
VEH SPEED MPH 0
ABSLT LOAD % 3.0
FUEL PRESS KPAG 384
FUEL SYS 1 CLSD
FUEL SYS 2 N/A
REL TPS % 2.3
THROT CMD % 2.7
ABS TPS B % 19.6
ABS TPS C % 56.4
ACC POS D % 7.0
ACC POS E % 7.4
CAT TEMP11 F 977
EVAP PURGE % 8.6
CMD EQ RATIO 1.000
O2S12 V 0.815
ST FTRM12 % 0.0
EQ RATIO11 1.001
O2S11 mA 4.499
CLR DIST($10) ---
CLR DIST mi 201
CLR TRPS 3840
CLR TRPS 5120
MIL DIST mi 41
MIL DIST mi 0
FUEL LEVEL % 76.0
VPWR V 13.808
VPWR V 13.300
ENG RUN m:s 02:22
ENG RUN m:s 02:25
OBD2 STAT CA
OBD2 STAT EU/CA/US
Frame -1 Time -6.9

MIL STATUS($10) OFF
MIL STATUS($18) OFF
ABSLT TPS($10) 2.3
ENG SPEED($10) 764
ENG SPEED($18) 763
BARO PRS($10) 102
CALC LOAD($10) 21.9
MAF FLOW($10) 3.38
MAP($10) 34
OUT TEMP($10) 71
OUT TEMP($18) 75
COOLANT($10) 168
COOLANT($18) 168
IAT($10) 109
IGN ADVANCE($1 12.0
ST FTRM1($10) 0.8
LT FTRM1($10) 6.2
VEH SPEED($10) 0
VEH SPEED($18) 0
ABSLT LOAD($10 3.0
FUEL PRESS($10) 384
FUEL SYS 1($10) CLSD
FUEL SYS 2($10) N/A
REL TPS($10) 1.9
THROT CMD($10) 2.7
ABS TPS B($10) 19.6
ABS TPS C($10) 56.4
ACC POS D($10) 7.0
ACC POS E($10) 7.4
CAT TEMP11($10) 976
EVAP PURGE($10 8.6
CMD EQ RATIO($ 1.000
O2S12($10) 0.810
ST FTRM12($10) 0.0
EQ RATIO11($10 1.013
O2S11($10) 7.499
CLR DIST($10) ---
CLR DIST($18) 201
CLR TRPS($10) 3840
CLR TRPS($18) 5120
MIL DIST($10) 41
MIL DIST($18) 0
FUEL LEVEL($10 76.0
VPWR($10) 13.769
VPWR($18) 13.200
ENG RUN($10) 02:29
ENG RUN($18) 02:32
OBD2 STAT($10) CA
OBD2 STAT($1EU/CA/US
Frame 0 Time 0.0

MIL STATUS OFF
MIL STATUS OFF
ABSLT TPS % 2.3
ENG SPEED RPM 758
ENG SPEED RPM 757
BARO PRS KPA 102
CALC LOAD % 21.9
MAF FLOW GR/SE 3.25
MAP KPA 35
OUT TEMP F 71
OUT TEMP F 75
COOLANT F 168
COOLANT F 168
IAT F 109
IGN ADVANCE DE 11.5
ST FTRM1 % 0.0
LT FTRM1 % 5.4
VEH SPEED MPH 0
VEH SPEED MPH 0
ABSLT LOAD % 3.0
FUEL PRESS KPAG 375
FUEL SYS 1 CLSD
FUEL SYS 2 N/A
REL TPS % 1.9
THROT CMD % 2.7
ABS TPS B % 19.6
ABS TPS C % 56.4
ACC POS D % 7.0
ACC POS E % 7.4
CAT TEMP11 F 976
EVAP PURGE % 8.6
CMD EQ RATIO 1.000
O2S12 V 0.805
ST FTRM12 % 0.0
EQ RATIO11 0.998
O2S11 mA 254.479
CLR DIST($10) ---
CLR DIST mi 201
CLR TRPS 3840
CLR TRPS 5120
MIL DIST mi 41
MIL DIST mi 0
FUEL LEVEL % 76.0
VPWR V 13.847
VPWR V 13.300
ENG RUN m:s 02:36
ENG RUN m:s 02:39
OBD2 STAT CA
OBD2 STAT EU/CA/US
Frame 1 Time 7.0

MIL STATUS($10) OFF
MIL STATUS($18) OFF
ABSLT TPS($10) 2.3
ENG SPEED($10) 752
ENG SPEED($18) 758
BARO PRS($10) 102
CALC LOAD($10) 21.9
MAF FLOW($10) 3.31
MAP($10) 34
OUT TEMP($10) 71
OUT TEMP($18) 75
COOLANT($10) 168
COOLANT($18) 168
IAT($10) 109
IGN ADVANCE($1 12.0
ST FTRM1($10) 0.0
LT FTRM1($10) 6.2
VEH SPEED($10) 0
VEH SPEED($18) 0
ABSLT LOAD($10 3.0
FUEL PRESS($10) 378
FUEL SYS 1($10) CLSD
FUEL SYS 2($10) N/A
REL TPS($10) 1.9
THROT CMD($10) 2.7
ABS TPS B($10) 19.6
ABS TPS C($10) 56.4
ACC POS D($10) 7.0
ACC POS E($10) 7.4
CAT TEMP11($10) 975
EVAP PURGE($10 8.2
CMD EQ RATIO($ 1.000
O2S12($10) 0.805
ST FTRM12($10) 0.0
EQ RATIO11($10 0.993
O2S11($10) 253.479
CLR DIST($10) ---
CLR DIST($18) 201
CLR TRPS($10) 3840
CLR TRPS($18) 5120
MIL DIST($10) 41
MIL DIST($18) 0
FUEL LEVEL($10 76.0
VPWR($10) 13.789
VPWR($18) 13.300
ENG RUN($10) 02:43
ENG RUN($18) 02:46
OBD2 STAT($10) CA
OBD2 STAT($1EU/CA/US
Frame 2 Time 13.9

MIL STATUS OFF
MIL STATUS OFF
ABSLT TPS % 2.3
ENG SPEED RPM 762
ENG SPEED RPM 764
BARO PRS KPA 102
CALC LOAD % 21.5
MAF FLOW GR/SE 3.14
MAP KPA 34
OUT TEMP F 71
OUT TEMP F 75
COOLANT F 168
COOLANT F 168
IAT F 109
IGN ADVANCE DE 12.0
ST FTRM1 % 0.0
LT FTRM1 % 6.2
VEH SPEED MPH 0
VEH SPEED MPH 0
ABSLT LOAD % 3.0
FUEL PRESS KPAG 384
FUEL SYS 1 CLSD
FUEL SYS 2 N/A
REL TPS % 1.9
THROT CMD % 2.7
ABS TPS B % 19.6
ABS TPS C % 56.4
ACC POS D % 7.0
ACC POS E % 7.4
CAT TEMP11 F 975
EVAP PURGE % 8.6
CMD EQ RATIO 1.000
O2S12 V 0.800
ST FTRM12 % 0.0
EQ RATIO11 0.999
O2S11 mA 254.479
CLR DIST($10) ---
CLR DIST mi 201
CLR TRPS 3840
CLR TRPS 5120
MIL DIST mi 41
MIL DIST mi 0
FUEL LEVEL % 76.0
VPWR V 13.828
VPWR V 13.200
ENG RUN m:s 02:50
ENG RUN m:s 02:53
OBD2 STAT CA
OBD2 STAT EU/CA/US
Frame 3 Time 20.7
###########################################################################
Comparing the "cold start" data to the "running normally" data, it looks to me like the MAF sensor readings are very high for the engine RPM in the "cold start" data. I am not familiar with this type MAF - ceramic coated hot wire. Usually the MAF signal is directly proportional to the engine RPM - higher RPM gives higher MAF signal and the MAF functions right from startup. The MAF signal is very large at cold startup and seems to get lower, more inline with the spec, as the engine runs. Perhaps the MAF is warming up? The "running normally" scan tool data shows the MAF signal at what I get no matter when I look for that engine RPM after the cold startup issue subsides.

Perhaps the high MAF sensor reading is causing my cold start issue or is this normal behavior for this MAF sensor of this type?

Maybe I am missing something?

Any suggestions greatly appreciated.

Thanks
Jxkeefe

[DGM]

Denso makes the MAF for this model. Have you tried to clean it. It can be removed by the screws on top.

Buy MAF cleaner and spray some on the end where is the thermistor. Normally one side is dirtier. Also look down the tube and spray some inside. Components who measure air flow are located down the tube. Let it dry and reinstall. Some use isopropyl alcohol. Do not use harsh solution as brake cleaner.

After it would be a good idea to reset adaptatives. Some call it battery reset. Turn off everything in the car and wait 5 minutes. Then undo the negative lead at the battery. Touch the disconnected lead to the positive post for more than 5 seconds. Turn the ignition to position II and reconnect the negative lead. This will initiate a relearn sequence of car computers.

Try it and let us know of result.

[jimmy57]

That is a dual CVVT low emissions engine. The MAF signal is greater during the first 30 seconds as the cam phasing is altered for catalyst warm up and reduced hydrocarbons. The normal performance of engines with that emissions strategy is to run a bit rough and labored and it is using a lot more air. The phasing of the camshafts effectively makes the engine push more air to dilute hydrocarbons in exhaust. The MAF rate is not what I see that is bothersome. I see how low the voltage is initially. Do you have a battery charger? I suspect a weak battery. If the voltage drops during cranking from a weak battery, the ECM can dump fuel trim tables from the adjusted fuel mixture that occurs when it runs at normal engine temperature. There is also a memorized throttle opening percentage for idle regulation.
CHarge the battery overnight and start it the next morning and see if the engine runs better. You can remove the battery charger before you start it so you can crank it and drive away immediately if the initial performance is what it should be.
If I have the battery disconnected on a car with 75000 miles or more and I connect battery and start car they runs rough and often stall and have to be re-started a couple of times.

[mbreed]

Could be water in the fuel tank. take a sample from the fuel rail.

[jxkeefe]

DGM: I will try cleaning the MAF next week. Out of town currently.

jimmy57 : You may be looking at the first frame when you indicate low batt voltage as an issue. That frame is just before I started the engine. You can see the engine RPM is 0. The next frame is just after engine start and the VPWR is 13.9V.
The MAF signal is very large for the engine RPM, manifold pressure and load well after 30 sec of engine running as the data shows. The engine starts in frame #3. in frame #8, the MAF is 25.61, MAP is 74 (throttle open), and ST Fuel trim is -16.1 (subtracting fuel engine running too rich) yet engine acts like it is running too lean - no power and no response to WO throttle. The fuel trim comes from the O2 sensor since the engine is in closed loop. The large MAF sensor signal suggests a large fuel flow to mix with the large amount of air passing into the engine yet the O2 sensor indicates to cut back n fuel per fuel trim indication. Perhaps the MAF signal is way too high causing more fueling than the air being drawn into the engine requires and thus the large leaning fuel trim. Once the MAF settles down, all is well with fuel trim as the second set of data indicates. When I had WO throttle in frame #5, the calc load was 98% - a bit high - and fuel trim was 0 but engine not in closed loop so no fuel trim expected.

mbreed: Regarding water in the fuel rail, I just swapped the fuel pressure sensor for code P0190. That is why you see MIL ON in module $10 in the first set of scan data. The check engine lite went off when I started the engine. Thus $18 doesn't see the MIL ON. This was before I cleared the code with the scan tool.The fuel pressure sensor is on the end of the fuel rail and when it is removed, all the fuel and/or whatever drains. Problem was still there the next morning.

[jxkeefe]

Cleaned MAF sensor with CRC MAF cleaner. No improvement.

The MAF sensor seems to consist of what looks like a thermistor mounted in the air stream. I did not see any fine wires. I am not sure if this is a newer design since all MAF sensors I have seen had the fine wires.

Ordered new MAF sensor.

Will post results of using new MAF sensor as soon as it arrives.

Thanks all for your help and suggestions.
jxkeefe