This vehicle has a crank/no start condition. No codes present, timing marks are at specification. Vehicle has appx 40 psi fuel pressure while cranking. 12v is present at all fuel injector connectors during initial KOEO and KOECrank). Vehicle has good spark. Compression on cylinders 2-5 ranges between 220-235 psi, cyl 1 has 165 psi. Vehicle has no anti theft system either factory or aftermarket as far as I can tell.
I am a rather experienced technician, but would like some help. As far as I can tell, the vehicle should run. I do have fuel pressure, spark and timing marks are good. The compression is a bit high as far as I know. 178 is spec, and the fact that cylinder one is so different from the others is suspect to me. Since I technically have good compression, spark and fuel pressure I would assume that fuel injectors are not being pulsed by the PCM. If this were true, the vehicle would possibly start when starter fluid is introduced into the throttle body. The vehicle will not start when this is done though. The vehicle does need new spark plugs and wires, and mostl likely cap/rotor too. All the plugs are oil soaked due to leaking valve cover gaskets/grommets. There are signs of arcing on multiple places on the secondary ignition wires.
CMP regulates injector pulse, and CKPcontrols ignition pulse, I may have to borrow a scan tool to check for CMP signal in the PCM. Can ignition voltage be too weak? Can I check for CMP with a DVOM at PCM harness connector? Car was driven, parked for about 6 hours, then current situation was discovered. Unsure of how car ran prior to this.
have the same problem?
Thursday, December 31st, 2009 AT 7:35 PM