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Discussion Starter #1
Hello everyone,

This is my first time posting here and I need some help, please.

The car is a 2006 Cobalt with a 2.2L engine.

The other day I started the car and it ran fine. Shortly after starting it I realized I had forgotten something inside and shut it off to go back inside. When I came back out it would not start again. I have never had any major issues with this car in the past.

The symptoms follow

1. The car cranks, but never fires, not even slightly.
2. I have 60 psi fuel pressure at the fuel rail.
3. I do get good spark on all four plugs.
4. There are no trouble codes at all

Things I've noticed while troubleshooting.

1. When taking the spark plug out, they are all dry. No gas at all on them, even though I have been cranking the engine without getting any firing.
2. When testing for spark, I feel that I should have smelled gasoline coming from the open cylinder, which I did not.

I have tried to disconnect the battery for 15+ minutes and got nothing. I thought maybe my key had become "unprogrammed" so I went through the long reprogramming process for the passkey system, which I've done before, and it still does nothing. I have checked all fuses and they seem fine.

The lack of gasoline smell or residue in the cylinders leads me to believe the gasoline is not making it there, but I'm not sure how that could be with fuel pressure.

Any help would be greatly appreciated.

Thanks,
Michael
 

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Check fuel filter, listen for start up of fuel pump when you turn the ACC on, check pump fuse. Just a start list.
 

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Pour 2 tablespoon of gas down the throttle body to see if it fires. Double check Fuel injector fuse
 

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Dang u, that was going to be my next suggestion too!
 

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I understand that you're probably after some DIY insights, and you have some excellent members already on the thread. If I can check into warranty/recall information for you, please be sure to get in touch with me via private message (include the last 8 digits of your VIN).
Sarah, GM Customer Service
 

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Discussion Starter #9
Check fuel filter, listen for start up of fuel pump when you turn the ACC on, check pump fuse. Just a start list.
Fuel pumps does seem to kick on when I turn the key to On position. Fuel Pump fuse is good. I will check the fuel filter.

Does anybody know what a normal fuel pressure is on this car when it is just in the On position, not running.

Pour 2 tablespoon of gas down the throttle body to see if it fires. Double check Fuel injector fuse
I checked the injector fuse yesterday, but a double check never hurts, so I will definitely do tonight. I will try putting some gas in the throttle body tonight to see if it gets fire. Then I can confirm that I am not getting fuel into the engine.

Thanks everybody.
 

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A quick google search netted the answer of 40psi give or take is average.
 

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Discussion Starter #11
I understand that you're probably after some DIY insights, and you have some excellent members already on the thread. If I can check into warranty/recall information for you, please be sure to get in touch with me via private message (include the last 8 digits of your VIN).
Sarah, GM Customer Service
I really don't care if the Cobalt fairy shows up in the middle of the night and fixes the car. :laugh: I just need to get back to having both cars for my family.

My father and I are normally good at fixing cars ourselves. There usually isn't a project we won't take on, but I need to narrow it down as I cannot afford to replace the wrong part and still not have a working car. This one just has us stumped so far.

I will PM you the last 8 of the VIN tonight when I get home. Thanks
 

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I've search all over google to come up with ideas I may have missed, but this seems to be my closest match. I'm having the same problem as Michael described in his first post. I backed the car down the driveway several nights ago, and the next morning the cobalt wouldn't start. Its a 2006, 2.2L, 110,000 miles on it.

  • I pulled the plugs and they spark up against the valve cover.
  • I can hear the fuel pump running and I pushed the bleeder pin on the fuel rail. I'm now covered in gas.
  • No codes at all
  • It cranks fine, but doesn't really sputter at all. Pistons move up and down (which is good haha), but starting fluid doesn't seem to have an effect.
Any ideas at all? It seems to be beyond the obvious, but its never easy to find the little random thing that is causing the problem. How do I test if the injectors are firing and flowing? I assume they aren't all-of-the-sudden-over-night clogged, but maybe I am wrong?

Also, the spark seemed strong to me, and if ignition timing was off somehow I think it would sputter or backfire to some extent.

Hoping someone can help, its cold as shit outside here in Chicago

Jake
 

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Pull and check the underhood fuses pertaining to engine first off. If you have fuel at the rail and spark, the only thing is they have to be in time. Maybe you have a bad crank sensor. Any codes???
 

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If you got sprayed you have enough pressure to at least start it. Don't forget to check the fuses.You have fuel and spark, so it isn't the fuel pump fuse or the ignition fuse. (IGN fuse also supplies injectors with power), so you are left with ECM("PCM") 15amp fuse. Car will not start without ECM. It will keep running if it's already started, but if the fuse burns it will not restart at next occasion.
 

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Well, it started and runs.

I switched a couple of the fuses around, as well as a couple of the relays. New plugs and fuel filter went in too. It took a bunch of tries, but eventually it sputtered enough and I kept pumping the throttle until it fired up. Misfired for a good 20 seconds and then it cleared up.

I like it so much better when the problem is definite and the solution is for sure; I wish this was the case today...
 

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If it happens again, look at changing you crank sensor. Hopefully you will get a code next time so you can better pin-point the problem.
 

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I have an 06 that is doing the same thing?

I have and 06 cobalt with a 2.2 dohc and it will crank and wont start. I have checked fuel pressure, timing, spark, did the head gaskets it was leaking but all the compression is good and it passed the leak down test. i dont know what to do. I have check the injectors and they are pulsing atleast at the connection but all four injectors going bad at the same time almost seems impossible.
 
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