Picked up a used 2003 Vibe. Engine will crank over with no problem, just never starts. Previous owner told me it just stopped one day at the store, never started again. Have done the following: New plugs Fresh gas, verified pump operation. Tested all coils for spark, good. Cylinder compression ~180psi on all 4 cyls. Tried a spare PCM Replaced cam position sensor (had previously set P0340 code) Checked and rechecked crank position sensor and cam sensor. Checked timing chain and timing, perfect. Checked all grounds and battery/alt output. On prolonged cranking, there is a slight stumble, but never fires up. Fuel is being delivered, can see it on plugs and can see it come out of open cylinder port. About ready to take it to the scrap yard. Any ideas?
Do you know what Camshaft Actuator System is ?
The standard compression pressure is 1,400 kPa (203 psi).
The camshaft position (CMP) actuator system enables the powertrain control module (PCM) to change camshaft timing while the engine is running. The CMP actuator assembly (5) varies camshaft position in response to directional changes in oil pressure. The CMP actuator solenoid valve controls the oil pressure that is applied to advance or retard the camshaft. Modifying camshaft timing under changing engine demand provides better balance between the following performance concerns:
• Engine power output
• Fuel economy
• Lower tailpipe emissions
The CMP actuator solenoid valve (3) is controlled by the PCM. The crankshaft position (CKP) sensor (4) and the CMP sensor (1) are used to monitor changes in camshaft position. The PCM uses information from the following sensors in order to calculate the desired camshaft position:
• The engine coolant temperature (ECT) sensor
• The mass air flow (MAF) sensor
• The throttle position (TP) sensor
• The vehicle speed sensor (VSS)
This mite be something to look at , Is cam timing advanced or retarded . The ) CMP Actuator Assembly !
SOURCE: 2007 PONTIAC VIBE CRANKS, BUT WONT FIRE.
it is still under warrenty. take it back to the dealer.
SOURCE: 2006 vibe won't start
its not the battery its still cranking isnt it! Probably needs an ecm. By the way it will say Toyota right on it so the toyota version has the same dang problem!!!!
SOURCE: cam & crank sensor code intermitten spark 2.4
check timing marks on cam sprocket,could be one tooth 'retarded'.
SOURCE: 04 Pontiac Vibe bad gas mileage without a code and then the p0420
that code is from having the plugs wires reversed as you did and the o2 senors regrsitered the overload on gas emmions once you remove the battery cables for about 5 minutes and then recconect and run the engine it should be okay
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