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tisilrad tisilrad is offline
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Join Date: Feb 2009
Posts: 215
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erratic idle/consistant miss

well i have driven it a few short trips and think i have all the fuel leaks sorted out (hopefully?).... still seems to want to run a little hot as one of my fans does not kick on? I know it works because i ran hot to it..must be the thermostat control(i have an aftermarket controller for one of the fans and one fan on manual) My new big problem is a bad miss in the engine and an erratic idle... i have 18-22" inches of vacuum at the intake manifold and the spark plugs have very few miles on them...Bosch platinum..should i go to Bosch supers? I noticed that the miss gets worse after driving around for a while...i am currently leaning towards replacing the coils because i think the ones currently on it are orig. coils from 1987!..the car has only 84500 miles on it so i doubt the p.o. changed them... the miss is bad enough to really prevent any spirited driving i need to take some exhaust temps i think and maybe narrow down the problem? any suggestions guys?
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Heraclitus: 1987 porsche 928S4 5 speed black/black moneypit
Old 11-07-2011, 07:46 PM
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