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Old Dec 4, 2021 | 12:18 PM
  #1  
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Michael Fuessel
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Default 2001 c5

After I drive for 15 minutes or more and shut off engine, it will crank, fuel pump comes on, but it will not start!
After waiting 30 minutes, it will just start up like normal.
Question is: does this sound like a engine or body controller? I have read in the past but can’t find, that some controllers can be opened and need a solder point re-soldered.
this has that sound to it. I Thank You for any help. It also runs great, it just has this one problem.

Last edited by Michael Fuessel; Dec 4, 2021 at 01:13 PM. Reason: Better explanation of title
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Old Dec 4, 2021 | 01:43 PM
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Maybe your gas cap isn’t venting causing a vacuum issue. Could be fuel pressure regulator or clogged fuel filter.
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Old Dec 4, 2021 | 02:43 PM
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My Honda lawn mower dose that too... and it's less than a year old....
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Old Dec 4, 2021 | 02:43 PM
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You’ll have to check to see if you have spark and fuel (injector pulse)…if you don’t have both it may be a crank sensor…does the Tach move when it cranks but doesn’t start ??…you can also spray a good shot of Brake Kleen into a vacuum port such as the PCV or brake booster and see if the car feel like it wants to start signifying a fuel delivery issue…I would also scan for DTC’s through the DIC. I’m moving this thread to Tech !!..it is also a good idea to fill out your profile…your location too…may be a Forum member in your area that may be able to help if your skills are below par !!

Last edited by C5 Diag; Dec 4, 2021 at 03:19 PM.
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Old Dec 4, 2021 | 04:28 PM
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Michael Fuessel
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I did try the brake Kleen several times and once it did start. It also will also try to start but still does not. No DTC’s. I will go check out these suggestions. Big Thanks.
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Old Dec 4, 2021 | 04:38 PM
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If it started EVERY time on Brake Kleen then you may have a fuel delivery issue…fuel pump or injectors…I would check for spark and if you don’t know how to check for injector pulse let us know and we can help…all you need is a 12 volt test light.
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