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I have a 2005 Chevrolet Cavalier with the 2.2L engine and 4 speed automatic. Recently the fuel pressure regulator went bad while I was driving down the road which has been replaced, and holds 50PSI with no bleed down after teh pump primes. But after I replaced it the engine will not start. Checked compression on all 4 cylinders and came up with 40-50 PSI on all 4. Pulled the cam cover suspecting a timing chain issue, however the chain is intact albeit with a bit of slack in between the 2 cam gears (the engine has 85,500 miles and well cared for) I have not checked for injector control or spark yet, but at this point I don’t think that’s really the issue here, but will be doing that very soon. Any suggestions are welcome as I do not want to blindly throw parts at this problem nor do I want to do a timing chain if I don’t have to (its really tight quarters in there)
Look forward to any suggestions or advice anyone can give me.
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Quick and easy test for you. Try to start the car for like 10 -20 seconds, and immediately pull one of the plugs out and see if it smells like gas. If it does, your fuel injectors are probably working correctly.
Compression is way too low to work. Sounds like it has jumped time most likely the tensioner failed and it jumped a couple of teeth. Check the mechanical timing. The 2.2L GM is a non-interefrence engine so no damage. This might have been the original problem instead of the fuel.
Thanks for the fast responses kind of figured it may have jumped time on me but wanted to hear it from other people first before i went to deep into diagnosing that. The regulator was an issue it was dumping fuel out of the vacuum port into the intake, no biggy GM’s seem to have issues with that. Thanks again .
If you have an Ecotec 2.2, you have bent valves. A common problem with these engines are failing timing chain tensioners. Good luck.
the car may be flooded.either pull the plugs to dry
or hold the pedal to the floor while trying to start it.Have you tried a wet test? You may have the cylinder wash. The ecotc isn’t interference but depending on how the car was driving when the chain broke it could of done some serious damage.
[quote=”SamG.” post=45680]Have you tried a wet test? You may have the cylinder wash. The ecotc isn’t interference but depending on how the car was driving when the chain broke it could of done some serious damage.[/quote]
I have a bucket of bent valves from a 04 Ecotec that would prove otherwise.
Don’t assume you have bent valves, it’s more likely to be flooded as College man pointed out. You might pull the plugs to see if they’re wet. If they are, dry them out or replace them. When you go to start the engine hold your foot to the floor on the gas. This will put it into clear flood mode and turn off the injectors while you crank the engine to help clear the flood.
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