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1997 855 GLT Cranks but won't start

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RunningMike
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Joined: 28 Dec 2014, 09:07
Year and Model: 855 glt 1997
Location: Sweden

Post by RunningMike »

That's what the work shop told me 1,5 years ago when the same error accurred. Could you tell me what the right way is, given that I have +12V on pin 2 in the cam shaft sensors connector? (as in the video I linked to).

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misha  
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Post by misha »

FLXC90 wrote:OP says couldn't get it to fire on ether, are you sure you have spark?
What about this....do you have a spark?
2010 S80 D5 / restyling / fully equipped / Twin turbo / Savile Gray Metallic (492)

History of Volvos in the family:
'71 144 S
'73 144 De Luxe
'78 244 DL
'78 244 DL
'79 244 GLE
'85 340 GLS
'97 850 2.5 20v / fully equipped / Motronic 4.4 from the factory / upgraded with S,V,C,XC70 instrument cluster / polar white wagon

RunningMike
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Joined: 28 Dec 2014, 09:07
Year and Model: 855 glt 1997
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Post by RunningMike »

Yes, as I posted in the first post it sparks on all five cylinders. And later I posted that I discovered it sparks 60-70 degrees before zero. I tried the start fluid straight into the cylinders and the enginge coffed a bit once the plugs where back, but with that advance timing ignition I guess not even ether is going to make it run.

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misha  
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Post by misha »

So...you are saying that timing is wrong.

On these cars...timing tolerance is up to 3 teeth.Everything after that pistons would hit valves and that would be game over.

With tolerance up to 3 teeth,engine will start and run but it will run badly and idle badly.

So...it can't be timing.
2010 S80 D5 / restyling / fully equipped / Twin turbo / Savile Gray Metallic (492)

History of Volvos in the family:
'71 144 S
'73 144 De Luxe
'78 244 DL
'78 244 DL
'79 244 GLE
'85 340 GLS
'97 850 2.5 20v / fully equipped / Motronic 4.4 from the factory / upgraded with S,V,C,XC70 instrument cluster / polar white wagon

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erikv11
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Post by erikv11 »

I don't have any answers, just trying to clarify ...

OP has posted it 3 times now: he is not talking about mechanical timing (when the valves open and close relative to piston stroke), he is talking about the timing of the spark. Spark timing can certainly be wrong without any disturbance of mechanical timing.

Are the plug wires attached in the correct order? That little metal thing under the rotor is in the correct orientation?
'95 854 T-5R, Motronic 4.4, 185k
'98 V70, T5 tune-injectors-turbo, LPT engine, 304k, daily driver
'06 S60 R, 201k
'07 XC70, black, 205k
'07 XC70, willow green, 223k
gone: '96 NA 850 210k, '98 NA V70 182k, '98 S70 NA 225k, '96 855 NA 169k

screwdriver
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Post by screwdriver »

no fire with ether = no spark. possibly a relay or fuse.

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erikv11
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Post by erikv11 »

:roll:

OP has stated a couple times now, the car has spark on all 5 cylinders, but the spark is out of time with the compression stroke.
'95 854 T-5R, Motronic 4.4, 185k
'98 V70, T5 tune-injectors-turbo, LPT engine, 304k, daily driver
'06 S60 R, 201k
'07 XC70, black, 205k
'07 XC70, willow green, 223k
gone: '96 NA 850 210k, '98 NA V70 182k, '98 S70 NA 225k, '96 855 NA 169k

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FLXC90
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Post by FLXC90 »

Exactly Erik, ether was to identify strictly whether it was a fuel problem, since that was being postulated at start of the thread. That was ruled out and OP stated timing advance 60 degrees before TDC and we know ignition timing is in the ECU. Therefore, it appears to be a programming problem/fault in the ECU. Could the Crank and cam position sensors play into it with a bad input? Or are they simply a failsafe for the interference motor?
Current Volvos:
1998 V70 T5, 112k sat 5 years, still in mechanical coma (finally at the top of the pile )
2004 XC90 T6 AWD: 186k, 60 on transaxle ( traded in )
1998 POS70 N/A: DD/training aid, 236k but really about 240k, I think...ABS module( passed on to son who sold it)

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FLXC90
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Post by FLXC90 »

Since cams run at different speed than the crank, could the CPS base and plate be installed 180 out? would that throw it off by about 90 degrees?
Current Volvos:
1998 V70 T5, 112k sat 5 years, still in mechanical coma (finally at the top of the pile )
2004 XC90 T6 AWD: 186k, 60 on transaxle ( traded in )
1998 POS70 N/A: DD/training aid, 236k but really about 240k, I think...ABS module( passed on to son who sold it)

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FLXC90
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Post by FLXC90 »

Scratch that last one, car would not have been running, DUH! Ok but if the sensor failed, it would screw up signal to ECU. It may test statically, but not work properly. Without reading codes, can't call it good. Mike, do you have another cam sensor to test with?
Current Volvos:
1998 V70 T5, 112k sat 5 years, still in mechanical coma (finally at the top of the pile )
2004 XC90 T6 AWD: 186k, 60 on transaxle ( traded in )
1998 POS70 N/A: DD/training aid, 236k but really about 240k, I think...ABS module( passed on to son who sold it)

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