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engine stalls when cold

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Old 02-14-2018 | 11:24 PM
  #11  
donbrew's Avatar
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It is supposed to throw a code, but if the solenoid is just weak or worn or susceptible to cold it might not.
Old 02-15-2018 | 07:56 AM
  #12  
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Will all these allow car it run fine after warm up, but not when cold?
Old 02-15-2018 | 08:23 AM
  #13  
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yes
Old 02-15-2018 | 08:34 AM
  #14  
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I give evap a test Friday, thanks,I'll let you know
Old 02-20-2018 | 10:52 AM
  #15  
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Donbrew, Just got to check evap purge solenoid, it checks good. I pulled off tried to blow through, it wouldn't. I reconnected and put vacuum to end of valve going back to engine and valve held vacuum. Like I said once it's even a little warmed up car runs fine. Today it was 48 degrees out, started up , ran about 1 minute at 1200 rpm, then hesitated and within 15 seconds died, If I kept running at 2000 rpm for 2 minutes it idled fine. I checked for vacuum leaks by all hoses & sprayed carb cleaner by intake with no change in idle. I'm thinking vacuum leak,but I haven't located it yet.
Old 02-20-2018 | 11:26 AM
  #16  
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Clean the throttle body with throttle body cleaner and your MAF sensor with MAF sensor safe spray.
Resist the urge to use carb cleaner!!
Old 02-20-2018 | 12:53 PM
  #17  
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I still suspect the EVAP valve cold could influence it. They are less than $25 in stock at most auto parts stores Duralast p/n PV443.

I can't think of anything else that would be affected by the temp.

After the hesitation, did the CEL come on? Check for pending codes immediately after an episode might not cause a CEL. Is the defroster on, could be the A/C clutch/compressor? Alternato bearings making noise.

Not many places for vac leaks. Brake booster, EVAP, loose bolts on manifold/TB, cracked manifold. One member managed to break one of the vac vents on the manifold. Not like a 70's V8 with vac hoses everywhere.
Old 02-20-2018 | 01:53 PM
  #18  
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Vapour return line could have pin holes.
Old 02-20-2018 | 03:28 PM
  #19  
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Not a return line it is vapor from the tank. The HHR fuel system is pressure regulated so it does not use a fuel return line.

But could be pinholes in the fuel line.




BTW: for the folks that think there is a design flaw that makes the lines inherently susceptible to corrosion.

Old 02-20-2018 | 05:28 PM
  #20  
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I have a fuel pressure gauge, I'll check. What should pressure be, I saw the test port on fuel rail, i'm guessing between 50-60 psi. Ignition on, engine off and hold pressure for about a minute within 5psi. Does that sound right??


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