Jerky throttle, part 31
Posted: Sun Jul 26, 2015 11:40 am
I've always been able to drive it by using the clutch, anticipating the immediate off throttle, " Right now," jerk, and smoothly using the throttle pedal on acceleration. It's only because I have two 528's I'm cursed with noticing differences in everything from noises to performance between the two.
I've kept every reply from Mike W., including the warnings about 35 years doing strange things to the wiring or creating tiny vacuum leaks. Out of pure stubbornness I've followed the trouble shooting advice large items first.
Replaced AFM, no change. Replaced distributor, same part number, new rotor, cap, timed properly. No change, or minor. Seeing green crunchy powder at the base of the temp/time sensor I replaced that and the temp sensor for the ECU. No change. Both are from parts collection, if the odds they fail are so great we should always buy new.
Next is replacing the throttle body but I have to admit doing it seems stupid. The one currently in place was completely rebuilt, gaskets, bushings, levers to new specs. The WOT and off throttle switches, " Click," and the plate is adjusted for them to do it properly. I.e., I'll do it if a Guru replies the odds are better than average there's a dead mouse in there causing the jerkyness, found only by replacement with a second rebuilt unit.
Otherwise, I've decided there will be no part 32. Between noodle picking for the teeny things and just driving it, I pick the latter, unless somebody has another large component to check, replace.
I've kept every reply from Mike W., including the warnings about 35 years doing strange things to the wiring or creating tiny vacuum leaks. Out of pure stubbornness I've followed the trouble shooting advice large items first.
Replaced AFM, no change. Replaced distributor, same part number, new rotor, cap, timed properly. No change, or minor. Seeing green crunchy powder at the base of the temp/time sensor I replaced that and the temp sensor for the ECU. No change. Both are from parts collection, if the odds they fail are so great we should always buy new.
Next is replacing the throttle body but I have to admit doing it seems stupid. The one currently in place was completely rebuilt, gaskets, bushings, levers to new specs. The WOT and off throttle switches, " Click," and the plate is adjusted for them to do it properly. I.e., I'll do it if a Guru replies the odds are better than average there's a dead mouse in there causing the jerkyness, found only by replacement with a second rebuilt unit.
Otherwise, I've decided there will be no part 32. Between noodle picking for the teeny things and just driving it, I pick the latter, unless somebody has another large component to check, replace.
