Hi Cal,
Weak ignition wire or spark plug. It would show up instantly on an
oscilloscope. The unburned gas is ignited with the next firing cylinder.
God Bless America, Bill O|||||||O
http://www.billhughes.com/

Cal wrote:
>
> my '97 GC frequently has a brief hesitation after restarting a warm engine.
> (I6.) When cold, I never notice a hesitation at all. I can drive until it
> reaches operating temp. If I restart the engine before it completely cools
> down, it will hesitate some on the first acceleration. It will occasionally
> have a very mild backfire or 'pop' sound, then accelerate normally and run
> fine the rest of the drive. This has never happened when cold. It starts
> fine (within a couple turns of the engine..) Any ideas?
>
> thanks,
> cal