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I just went to look at an 02 cummins, 6 speed and when my buddy went to test drive it he said it wouldn't rev past 1500 rpm's and that was in every gear. Truck has 91,000 miles on it. Anybody have an idea of what could be wrong?
also... There was a lot of white smoke coming out of the stacks when the guy pulled it around for us to see. The truck wasn't warm when he pulled it around so we don't know if that could be the case.
I had to disconnect the batteries for 5 to 10 minutes the first few times this happened. It still happens occasionally but all I have to do is turn the key off and restart. Now I can do this while rolling, in neutral of course.
It is very intermittent, practically rare, but the situation when it occurs has been consistent. On hot temperature days and the truck is idling for upwards of 5 minutes then using reverse. Such as idling in front of a store then backing out onto the road for example.
Unfortunately I do not enough to explain why this happens or why I had to disconnect the batts the first few times (all in the same drive) and now I can just cycle the engine off/on to clear it.
I have never heard or read about having to take it to a dealer to clear limp mode, but I am certainly not an expert and this would not surprise me. I seem to recall that other conditions may cause the rpm limit situation. Let us know if disconnecting the batts clears to condition or if we need to look for a different solution.
I'd take in to a parts store and get the codes read. Most places will do this for free. you can do the key-on-off-x3 but I found once that didn't tell the whole story. My truck was once in limp mode too and it was simply the map sensor...a very easy fix.
as far as the white smoke goes...does it go away when the truck warms up?
but it could be as simple as a broken wire to say that the truck is in gear as opposed to in neutral, as most vehicles have limiters placed on the rev's while in neutral. (neutral safety switch) loose or broken?
00 Dodge Ram 2500 4x4
carter lp,Super B Special, mbrp 4", juice w/att, homemade intake, 33's, three trannies later---> almost enough power
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