Chasing this condition, can't seem to figure it out. There is a stumble that lasts only a split second, every 8-9 seconds (like clockwork) only when the engine is not under load. If the car is stationary and in gear, it's perfect. Under 99% of the driving conditions, it's perfect. Runs like a bear, doesn't misfire at any other time. The only time it stumbles is when idling though a parking lot in gear (basically almost no load) or when stationary out of gear (no load against the motor) . It resembles a momentary ignition or fuel cut and immediatly clears out and runs fine. I don't have a scanner like TurboLink where I can capture data, I know that's probably going to be the next purchase......but in the meantime, any ideas? It's been going on for a while, now it's starting to annoy me.
Combo:
motor built by Don Cruz, 109 block, ported irons, ATR billet roller, Lucas #40, Jay Lubrant chip, Walbro, casper's hotwire, headers with no leaks, Ported elbow, 3" kirban Downpipe, no cat, 3" single shot.
Combo:
motor built by Don Cruz, 109 block, ported irons, ATR billet roller, Lucas #40, Jay Lubrant chip, Walbro, casper's hotwire, headers with no leaks, Ported elbow, 3" kirban Downpipe, no cat, 3" single shot.