Throttle position sensor maybe, Check to make sure you dong have a loose
vaccum line.
Dion Brownlee wrote:
> Quick question for the group. I have an 89 3.9L and I am currently having
> this problem....When the truck is cold all is well and then as it starts to
> warm up the following happens....The idle is fine but when you begin to
> slowly accelerate the thing almost dies, you can let off the gas and
> everything will settle down. When you accelerate with moderate to hard
> accleration everything is fine. I tend to think that this is ignition
> related and will probably try the cap and rotor change. Any ideas..thanks
>
> Dion
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