Periodic rough idle when warm

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Jan 12, 2014 | 01:57 PM

galaxyflyer1

Thread Starter

New User

Joined: Jan 2014

Posts: 1

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Periodic rough idle when warm

Hello,
My 95 4.0 has had a periodic idle issue for quite a while. It seems it may be getting worse. Here is when it may only happen:

Vehicle is fully warm. I shut it off for about 1 hr or so and when I restart it, it shakes and misses in idle. It will idle fine after I drive it around or if I rev the engine for a while when still parked.
This never triggers the "check engine light".

New fuel filter, plugs and wires.

Any ideas?

Thanks,
Bob

Jan 15, 2014 | 08:46 PM

Monteg0

Senior User

Joined: Jan 2014

Posts: 160

Likes: 0

From: Lincoln, NE

Fuel pressure regulator leaking gas into the cylinders when warm? Check a plug or two before you start it and see if they're wet. Personally, I'd guess your problem is fuel related somehow.