90 Dodge Caravan... 2.5L 4 Cylinder

do you know what a misfire is? Does it feel like one?

I know what a misfire is, its not a misfire... i have a 92 dodge spirit, same motor as the caravan and it runs good, i took the distributor cap, wires and everything off it and put it on the van and it still does the same thing

By chance have you replaced the fuel pump in the last few thousand miles?

When have you last performed an air induction service to reduce the carbon on the thorttle plate & bore and the intake valves?

I havent replaced the fuel pump in around 4-5 years, one mechanic told me that fuel pumps give no warnings that they just automatically goes out... also, i have noticed when going down the highway and it does start to carry on, reving the engine acouple of times while in Neutral helps

The reason I asked about the pump was regarding a tsb that may have fit your symptoms regarding an incorrect strainer istalled on the pump that would act up in a short period following.

On a side note: Fuel pumps can fail unexpectedly and at once, and that may have been the case more often with the Pre 95-ish ones, but that isn't true anymore. Bleed backs and a pump slightly out of spec are a couple examples.

See if you can get the codes pulled from the computer.

Could you describe this as a shudder?


When have you last performed an air induction service to reduce the carbon on the thorttle plate & bore and the intake valves?

HAve you tried cleaning the IAC motor?

Ive cleaned the IAC several times... the computer codes said Air Charge Temp Sensor... Changed that, same thing... and the Speed Sensor, those things r hard to find for the A413 transmission... i disconnected the cord for the transmission lock up solenoid because the transmission was making it buck bad... i havent done an air induction service... one forum told me i might have a possible slight gas leak or might be the FPR... i dont have a fuel pressure tester, so ill check for leaks, when i was fixing the exhaust on the van i smelled gas, but the smell went away quickly so i didnt think nothing more about it, thought it was the thing i was laying on, cause it smelled alittle like gas to

It might be a carbon prob, cause once a plug got stuck in it, and couldnt get it out for like over a year, then i finally got it out and it had a ton of carbon on it... i dont think its the transmission because why would it buck and what not when you rev it in park and neutral also