CamaroZ28.Com Message Board - Low idle and hesitation

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Fbodymaro

03-08-2019 08:40 PM

Low idle and hesitation

Hey, I have a 2000 z28. I can drive for awhile with now problems but if I shut it off for a few minutes then start it back up it has a low idle and hesitates when I try to go. It only does that for a minute or two then it runs fine again, any thoughts?

Injuneer

03-09-2019 11:30 AM

Re: Low idle and hesitation

Does it smell of fuel when that happens? Could be a leaking injector.

Or could be related to the O2 sensors. When you start the engine, there is no feedback from the O2 sensors for the first 3 minutes, because it can take that long for the PCM to enter closed loop and start correcting the A/.F ratio. A data log showing the long term and short term fuel corrections would show that problem.

Fbodymaro

03-09-2019 02:14 PM

Re: Low idle and hesitation

I don't smell any fuel, I replaced the O2 sensors a few months ago.

Injuneer

03-10-2019 10:19 AM

Re: Low idle and hesitation

Does it start and idle correctly when the engine is started cold?

Fbodymaro

03-10-2019 10:26 AM

Re: Low idle and hesitation

Yea it runs fine

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