mortymower

well i just bought this car and it was running super rich, (spitting gas/soot out in liquid form of the tail pipe) sometimes it would run really badly and smoke at idle and try to die, and others it was okay but a little high, all the while running very rich. I see some sealant on the idle set screw like its been messed with so could he have not replaced the bad sensor and just opened that screw up a ton and now that it has a new sensor its way wrong. any ideas cause when i cranked for the first time it went stright to 4000K RPMs and sat there but not really rich anymore

mortymower

okay so now even with the o2 sensor unpluged it does this, also with my maf unplugged it slowly climbs until it gets to 4K and does the same thing, what the hell

Bill

Check to see if your throttle butterfly is not closing completely. I have seen throttle cables holding open the butterfly with these symptoms.

High fuel pressure could cause this.

mortymower

well when the throttle cable is all the way addjusted to go back, but if i apply some pressure to it it will come back down to idle but i have to push the butterfly closed with manual force, it has a 3 Bar fpr and it ran really rich before, and before when i unplugged the sensor nothing changed, and now when i unplug nothing changes so why did this just happen all of a sudden? Can i turn down the fuel on the DME switches?

caster951

check lindseyracing.com. You may need to set the idle, the proc. Is the maf new and does the car have chips designed for the maf? How are you controlling afr?

mortymower

the maf is an old autothority and i think it has correct chips, no idea how im controlling the afrs right now.