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Originally Posted by Hatterasguy
Well his 602 looks a lot like my 603 with one cylinder chopped off.
So I will go out on a limb here:
My 603 will rock the car everyonce in awhile. Usually if I bring the rpm's up the problem will go away. I just live with it for now. I talked to a Bosch shop about it and they said something in the IP could be getting weak and to turn up the idle. I turned the idle up and it worked now it only does it about half as much.
Afaik the only fix is an IP rebuild and I am not going to do that at this time. |
What intrigues me is how sometimes it runs very smoothly, which could suggest it is some sort of engine control malfunctioning part of the time.  I would like to know more about the circular unit on the back of the IP (with a wire connected to it); wondering if that has anything to do with it.
Thanks,
John 
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1986 190D, 2.5L, 5-speed swap, 180,000 Miles (60K by me).
Jeep CJ-7 with Cummins 4BT/NV4500/AtlastII 4.3.
Grand Wagoneer 4BT project in progress!
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