I have a 94 caravan 3.0l V6 that will run fine, but then randomly act like its running out of gas. At Highway speeds, the engine will kind of Jug and Jerk, the Speedometer drops down too 10, then jumps back upto the speed im going. If this happens at a red light, it general stalls out. Start it back up, some times it starts up like nothing happened, other times it will hesitate and chug and miss while starting up, and i have to keep the revs up too kept the engine from stalling out. Somtimes when i try and give it gas, it makes no difference.

Now, Im not sure if this would cause all these problems or not, but at the start of the month i found out that I have low compression on the #3 Cylinder, only 50psi where as the rest of them are around 130psi. but this has been an issue for a month, and this new problem started 3 days ago.

I also thought it was an electrical issue because when it bogs down and chugs out, my heater fan goes too half speed, and all the lights, Instrument lights and head lights dim too half brightness as well... Took it too the shop too test the alternator and battery, turns out my battery was dead, replaced that, Lights don't dim anymore, but still stalls out.

When I first got the van, it had a smiler issue with the TPS sensor, this is almost acting the same but not quite. when the TPS sensor connector was dirty, id have too wait 10min to start back up... but could it be the TPS acting up again, or the low compression? Or any other ideas ?

Also noticed when it bogs down at idle, a few of the Relays start Clickin away. and when the issue is midly acting up, the car while idle normaly, and now and thin the revs will pick up as if the computers tryin too keep the engine from stalling out.