2005 Cavalier No Start (has:fuel/spark/compression)
August 29th, 2018, 1:00 AM
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2005 Cavalier No Start (has:fuel/spark/compression)
2005 Cavalier (2.2 ecotec) with new:
Fuel pump (50psi prime 65 psi during crank)
New fuel filter
New Spark Plugs
New timing chain,tensioner, guides,
New valve springs
New lifters
New Rockers,
New Vale Seals
New crank seal, and harmonic balancer
New belt and pulleys. (possibly other stuff that i'm forgetting)
Compression test dry (120/120/110/120) PSIG (open intake @ +13vdc) {MIN 100PSIG MAX DEVIANCE 70 %}
Spark gap (strength) observed @ over 1/2" to ground. (on coil pack)
I did a valve seal job and replaced all the worn stuff while I was at it. Motor was running rough @ idle 500-700 bouncing/surging,
Tore down to timing chain to inspect and reset just to make sure - no difference. (3ed time was not the charm)
Timing marks were
crank @ TDC 5 oclock dot to mark
Intake to 2 oclock and exhuast to 10 oclock.
Since the cams were removed - the cam lobes of cylinder 1 were set to TDC on Compression stroke. (from all the references I saw no lobes should be depressing the valves during TDC) The other option is 180 degrees and that would be on the intake stroke. So i believe i got it right. but maybe you know otherwise? (Also compression is good)
After starting and running for 30 mins of so with no computer adjustments (still running rough). I cleaned all the grounds then sprayed carb cleaner to find possible vacuum leaks - spayed some into the intake then the engine stalled and will not restart.
Intake has been pulled apart and cleaned, IACV has been removed and cleaned with electrical cleaner.
I have confirmed voltage @ each injector. Measured resistance of each injector 12.5 ohms.
I don't have a dc amp clamp so I can't measure pulses of current for the injectors. (this also would verify if the PCM is switching the ground contacts properly or not)
All fuses have been checked.
NO CODES ARE PRESENT / NO CHECK ENGINE LIGHT
Any other suggestions like getting a guy with a snap on reader to reset everything and chart the mixtures?
Buy a new PCM?
Or possibly another reset procedure (other then disconnecting battery for extended time frames)
Any help would be much appreciated.
Fuel pump (50psi prime 65 psi during crank)
New fuel filter
New Spark Plugs
New timing chain,tensioner, guides,
New valve springs
New lifters
New Rockers,
New Vale Seals
New crank seal, and harmonic balancer
New belt and pulleys. (possibly other stuff that i'm forgetting)
Compression test dry (120/120/110/120) PSIG (open intake @ +13vdc) {MIN 100PSIG MAX DEVIANCE 70 %}
Spark gap (strength) observed @ over 1/2" to ground. (on coil pack)
I did a valve seal job and replaced all the worn stuff while I was at it. Motor was running rough @ idle 500-700 bouncing/surging,
Tore down to timing chain to inspect and reset just to make sure - no difference. (3ed time was not the charm)
Timing marks were
crank @ TDC 5 oclock dot to mark
Intake to 2 oclock and exhuast to 10 oclock.
Since the cams were removed - the cam lobes of cylinder 1 were set to TDC on Compression stroke. (from all the references I saw no lobes should be depressing the valves during TDC) The other option is 180 degrees and that would be on the intake stroke. So i believe i got it right. but maybe you know otherwise? (Also compression is good)
After starting and running for 30 mins of so with no computer adjustments (still running rough). I cleaned all the grounds then sprayed carb cleaner to find possible vacuum leaks - spayed some into the intake then the engine stalled and will not restart.
Intake has been pulled apart and cleaned, IACV has been removed and cleaned with electrical cleaner.
I have confirmed voltage @ each injector. Measured resistance of each injector 12.5 ohms.
I don't have a dc amp clamp so I can't measure pulses of current for the injectors. (this also would verify if the PCM is switching the ground contacts properly or not)
All fuses have been checked.
NO CODES ARE PRESENT / NO CHECK ENGINE LIGHT
Any other suggestions like getting a guy with a snap on reader to reset everything and chart the mixtures?
Buy a new PCM?
Or possibly another reset procedure (other then disconnecting battery for extended time frames)
Any help would be much appreciated.
