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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.
Sunday, January 14th, 2007 AT 11:19 PM

7 Replies

Tiny
SERVICE WRITER
  • MECHANIC
  • 9,123 POSTS
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
  • 7 POSTS
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
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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
  • 7 POSTS
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
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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
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  • 7 POSTS
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
  • 7 POSTS
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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