Question about 1999 Dodge Ram

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'92 dodge caravan dies at operating temperature

Have a 'dodge grand caravan with the 3.0. We swapped motors with a '92 plymouth voyager 3.0 that had been running great. After swapping motors the motor starting running rough and now when it gets to operating temp. she dies, we are able to restart her but foot has to be on gas. We've tried all sensors. The only thing that we haven't done is put different fuel pump on. All compression tests come out fine. Any suggestions. Trying to get fixed in time for xmas to use while other van looks at having trans. rebuilt since overdrive gear went out.

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  • kristian4 Dec 07, 2008

    The grand caravan is also a '92. So they are actually the same year. My husband has swapped out all of the sensors except the oxygen sensor only because it won't come out.

  • kristian4 Dec 11, 2008

    We've now taken it to the dealership. They came up with 20 codes. When things were checked individually, everything checks out great, its when everything is put together that is causing the problem, and even the dealership is stumped and can't figure it out.

  • kristian4 Dec 12, 2008

    Thank you for all your suggestions. The dealership finally found that it was a broken wire in one of the wiring harnesses. They have now fixed the problem & it finally works. Thank you for all your helped.

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With the difference in years, there maybe a difference in alot of things. I'd start with mking sure every sensor, injector, everything links up properly to the 99 caravan pcm. If it's seeing the wrong info it will be a no go. Sounds like it's thinking it's -40 outside(foot to the floor to start) this indicates the coolant temp sensor maybe screwy. Let me know what you find, and about any other changes or issues.

Posted on Dec 06, 2008

  • Rob McFarlane Dec 10, 2008

    Best to start from the beginning, with easy tests, fuel pressure, which should be above 36 psi and perferably closer to 48 psi. Make sure you have good spark, and that the timing is on. If all checks out then drive the van until it acts up, then repeat all the tests. If you have access to a scan tool to capture any info when the van is acting up that would be good to. Also, a scan tool may indicate a code which has not turned the engine light on, the older vehicles are more fault tollerant, meaning it takes more to set the light.Hopefully something here helps. Good luck, let me know.

  • Rob McFarlane Dec 11, 2008

    Do you have a list of the codes you could send me? Sounds like a pcm or communication issue.

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