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2WD 3.9L 92 Dakota stalling and acting really...wierd...

3827 Views 4 Replies 5 Participants Last post by  ka9yhd
Okay, so, short trips in town the truck does fine. But after I've driven around for about 30-45 minutes it starts to stall like its being starved for gas. 50% of the time if I put the pedal to the floor it'll stay in the ame gear and at the same speed, the other 50% of the time it'll upshift and jump forward like its at Talladega, but it never really quite rights itself, once it slows down it starts to have the same problem again. Then if i turn it off to let it sit for a few minutes, it'll start right up but it wont idle. It stalls out and dies unless i hold down the accelerator. But if it sits for an hour or more it'll start right upand drives fine then the problems persist. I learned on Mopars and have to say, I'm dumbfounded. All filters, fluids, and gaskets have been replaced within the last 600 miles. Also, not sure if its related, but about 10% of the time when i put the pedal to the floor it'll shift a little harder than what I'm comfortable with, but only when its having the stall out issue. So, like I said, I'm at a loss for words. Sombody please help because this is my daily driver. Oh, it's also a Throttle body, not injected or carb'd.
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Welcome to Allpar. Diagnosis first. Any fault codes? Do you have a fuel pressure gauge that you can connect and pin under a wiper blade to monitor fuel pressure while driving?
The TBI system should be around 14 psi up to '92. There was a transition to the Magnum TBI and pressure increased to about 40 psi.
Don't forget to rule out ignition system possibilities. Low spark voltage when opening the throttle will 'blow out the candles', so to speak.
You want this to be in 'acting up mode' while looking for the cause. Are the Champion RC12YC spark plug tips a tan/white color?
Is the spark from the ignition coil a nice blue-white and not an orange color?
Transmissions can kickdown harshly with engine torque output issues and open throttle. Get the engine issue solved before judging the transmission.
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