We're talking about the 17mm IP driveshaft seal? I had one leaker that affected idle. Kept stalling, did not want to idle, but would run at higher RPMs. As this area should be under slight positive pressure when running (there is a weep hole into the seal recess area so fuel can lubricate the seal) it did not make any sense that there could be air ingress there while running. Replacing the leaky seal solved the problem.
Maybe so much air entered the IP overnight that it never completely worked itself out during my testing attempts? As it would die at idle and lower RPMs I did not have the courage to drive it around much because of the driveability problems.
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1985 744 gle d24t
1985 745 gle d24t
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