It runs really well the first minute but it’s idling rough when it’s getting warm. Some misfiring every now and then. Runs rough in low rpm, but it runs well during acceleration.
I’ve changed throttle body, MAF and fuel filter. I’ve cleaned and checked the two vvt-solenoids. Checked for leakage… Still the same behavior…
Any suggestions?
Spark plugs? Were changed in March but to cheaper ones. Wondering about getting Volvo ones…
Intake air sensor shows about 65F (before start) but the ambient temperature were 36. Can that difference cause the rough idle and misfiring?
crank shaft angle sensor?
camshaft angle sensors?
anything else? O2?
XC90 2.5t 2004 rough idle and misfiring
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RickHaleParker
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Yes Air temperature is one of the data points used to calculate Air/Fuel mix ratio.
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1998 C70, B5234T3, 16T, AW50-42, Bosch Motronic 4.4, Special Edition package.
2003 S40, B4204T3, 14T twin scroll AW55-50/51SN, Siemens EMS 2000.
2004 S60R, B8444S TF80 AWD. Yamaha V8 conversion
2005 XC90 T6 Executive, B6294T, 4T65 AWD, Bosch Motronic 7.0.
1998 C70, B5234T3, 16T, AW50-42, Bosch Motronic 4.4, Special Edition package.
2003 S40, B4204T3, 14T twin scroll AW55-50/51SN, Siemens EMS 2000.
2004 S60R, B8444S TF80 AWD. Yamaha V8 conversion
2005 XC90 T6 Executive, B6294T, 4T65 AWD, Bosch Motronic 7.0.
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