Join Date: Aug 2010
Location: Freakin' cornfields
iTrader: 1 reviews
91 LX Misfire
Symptoms: Surging idle, runs like it has a dead miss through all RPM. Put a timing light on it, looked like I had spark going to all cylinders. Checked the plugs, none looked too bad, gap was in spec. Replaced plugs, now ran like it had two dead cylinders. No active faults; a few stored ones I don't recall off the top of my head, nothing that would normally associate with misfire.
Try to determine which cylinders are dead by disconnecting injectors.\
Any tips, particularly on ignition? I can do distributor, I can do COP, but this 8 plug DIS nonsense is some serious clusterfuckery. I know it's waste spark, but it also has two banks. Do they fire simultaneously or are they staggered? Is one primary or are they completely redundant?