My 2001 dodge ram 1500 4x4 has the 5.9 liter motor. I get a stumble in the motor when and only when it is at half temp. I have to drive the truck from cold to normal temp it runs fine. I leave it for a half hour, then start it to go and I get the stumble. In drive and or in reverse. This is the only situation when it happens.
The motor has a new distributor, new coil,plugs,wires,temp sensor. I have cleaned the MAF. The fuel pressure has checked out fine also. The dealer said they pro formed a smoke test to eliminate the plenum gasket as a problem. they said it passed. The truck runs great all the time except in this situation. I was looking for any suggestions on what i might do to try to remedy the problem. Any suggestions would be appreciated.

 

Does it just miss a bit? Hesitate when you step on the gas?

 

yes, only when you step on gas.When it happens,I let off the gas, then step on it slowly again and it runs normal.

 

check the throttle position sensor. Sounds like it might have a dead spot.

 

I checked out the tps with a volt meter test. It is only 5 months old. It tested out ok. Any other suggestions. Thanks

 

Digital or analog meter? Digitals don't react fast enough to give an accurate test.