90 Dodge Caravan. 2.5L 4 Cylinder

Tiny
1992 DODGE SPIRIT
  • MEMBER
  • 1990 DODGE CARAVAN
The Dodge Caravan have been acting up like on idle, I can rev it up then while its reving down it bucks, and also on the highway when its slowing down it will buck, what might be causing this.
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Sunday, January 14th, 2007 AT 11:19 PM

7 Replies

Tiny
SERVICE WRITER
  • EXPERT
Do you know what a misfire is? Does it feel like one?
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Monday, January 15th, 2007 AT 10:34 AM
Tiny
1992 DODGE SPIRIT
  • MEMBER
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
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Monday, January 15th, 2007 AT 7:03 PM
Tiny
SERVICE WRITER
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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?
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Monday, January 15th, 2007 AT 8:30 PM
Tiny
1992 DODGE SPIRIT
  • MEMBER
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
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Monday, January 15th, 2007 AT 10:19 PM
Tiny
SERVICE WRITER
  • EXPERT
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?
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Tuesday, January 16th, 2007 AT 3:19 AM
Tiny
1992 DODGE SPIRIT
  • MEMBER
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
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Tuesday, January 16th, 2007 AT 4:49 AM
Tiny
1992 DODGE SPIRIT
  • MEMBER
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
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Tuesday, January 16th, 2007 AT 6:27 AM

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