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Engine does not start when warm

Tiny
DEQUINOX05
  • MEMBER
  • 2005 CHEVROLET EQUINOX
  • 6 CYL
  • AWD
  • AUTOMATIC
  • 81,000 MILES
Engine cranks, but will not start sometimes. No DTC codes. I used to be able to just press the gas pedal to let more air in, but now that seems irrelevant.

The rpm shoots higher than normal, then goes down really low. Again, this is only after the first start-up and engine is warm. Or it will start really low and I'll have to press the gas pedal for assistance.
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Friday, December 17th, 2010 AT 3:13 PM

5 Replies

Tiny
HMAC300
  • MECHANIC
  • 48,601 POSTS
Clean your throttle plate on both sides with choke cleaner and your oblong hole that contains the idle air control. Then check your fuel pressure. It shold be 50 psi minimum.
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Friday, December 17th, 2010 AT 6:27 PM
Tiny
DEQUINOX05
  • MEMBER
  • 3 POSTS
Throttle plate and pipes are clean. Should I check starting fuel pressure? Or while it's running on the road? I've read that a scan tool can command the fuel pump on, but I don't have that type of scan tool.
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Monday, December 27th, 2010 AT 7:55 PM
Tiny
HMAC300
  • MECHANIC
  • 48,601 POSTS
Check the fuel pressure while running. It may be low.
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Tuesday, December 28th, 2010 AT 5:30 AM
Tiny
DEQUINOX05
  • MEMBER
  • 3 POSTS
I actually found that the starter fuse is not lighting properly. The fuse itself is not broken so I guess that means there's something wrong with the wiring?
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Wednesday, December 29th, 2010 AT 1:13 PM
Tiny
HMAC300
  • MECHANIC
  • 48,601 POSTS
If your car cranks then that is the starter system and not the fuse. Take this to a pro wom will know what to do.
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Wednesday, December 29th, 2010 AT 4:53 PM

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