Quote:
Originally Posted by biggtbiggt
disconnected o2 and still the same stumbling. I wonder if it is the TPS??
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Just FYI, the 84-89's don't have a true TPS, they have idle and WOT switches instead. These should be checked but I wouldn't think they would cause this problem unless the WOT switch was stuck.
One thing that can aggrevate spark misfires is very large plug gaps, as the spark will look for easier paths to ground.
Also check your distributor advance springs are intact by gently spinning the rotor - it should move a few degrees and then be pulled back by the springs. Note the rotor advance is only for pointing the rotor at the right terminal, it doesn't actually advance the timing (the DME does that electronically).
HTH,
Chuck.H
'89 TurboLookTarga, 352k miles