We own a 1990 DODGE TRUCK DAKOTA 4WD>6 Cylinders 239 X 3.9L FI>

Several years ago, it started running rough and dogging out on acceleration.>It was like it was only firing a few cylinders. At first it only happened>in the winter or when it was cold and rainy. During the summer, the truck>ran totally fine. Come cold weather -- we didn't run because it ran so bad.>

Then last fall, it started running rough, and dogging out on acceleration>all the time. It got to the point, we couldn't drive it because we couldn't>safely depend on the accelerator to go when we pushed it -- through lights>and stop signs. The vehicle herked and jerked too much for a sane ride.>

The power on the vehicle starts to drain when this happens. The lights dim,>and it feels like the engine is going to die though it rarely does.>

This happens to us at low or high speed. Speed doesn't matter.>

It starts up like a champ -- every time. There are no issues with startup.>

We're going nuts. We've had it hooked up to diagnostics. It doesn't find>anything.>

We've replaced the O2 sensor, the ingition coil, spark plugs and wires -->and insulated them with extra corregated pipe, we got a new cat coverter and>muffler system as well -- and it is still happening.>

My poor husband is going nuts!! Tonight he is thinking of replacing the EGR>value, and potentially buying new fuel injectors for the truck!!!>

We don't believe it is a vacuum leak because our idle while it does get>high -- it goes back down -- which they say won't happen with a vacuum leak.>

Last, we realize it could be a leak in the intake manifold, and it could be>the coolant sensor.>

ANY HELP WOULD BE APPRECIATED. We need this truck desparately. We have>upholstered furniture waiting to be picked up. The guy is getting mad at>us!!!!>

I'd like to be able to help my husband.>MANY THANKS!!!!>

Have you checked the inside of the disributor cap for carbon tracks?>

Old_Timer