I just did the vacuum hose job, and replaced my silicone with viton- absolutely great stuff!! While I had it all apart, I bypassed a number of systems on the motor: the AWS, the EGR valve (and removed the solenoid), the double throttle system and associated solenoid, and the throttle body coolant line. I also removed the hot wax unit and cam for the AWS, and to do this, I removed the throttle position sensor, but reset it when I put it back on via the PFC readout.



I have a PFC on the car that was tuned by Steve Kan (and the car had excellent driveability), and when I started the car after this work, it runs horribly rich- tons of smoke, the plugs are sooted, there's soot all over the exhaust, and a very lopey idle.



Is there something that I inadvertently touched that has produced this full rich situation? I also went to the PFC and pulled fuel out of the map across the board (while idling) to see if it changed the idle/smoke, and that did not help at all.



I'd appreciate any suggestions or ideas on this one.....

Sounds like you did not get the TPS set to the proper position.

if you unplug the TPS, it should go to default 0% reading anyway... see if your engine responds to you unplugging it while it's running.

I had checked the TPS settings via the PFC. The narrow angle voltage is at 1.22V, and the wide angle is .52v. The repair manual calls for a range of .75-1.25v on the narrow, and .1-.7v on the wide. I'm within the spec'd range, but a touch on the high side. Shouldn't be that rich, no?



I have the UIM taken off to check all hoses and their destinations...just to make absolutely sure. While I have it off, any thoughts on a stuck fuel injector causing the fuel dumping?



Also, while the car was running, I went into the 'settings' window on the PFC, and in the fuel/ignition timing correction menu, I temporarily adjusted the fuel correction downward, which pulls fuel out of the map across the board. I took it down from 1.000 to .750 with no affect on the rich running- which is why I'm suggesting a faulty injector (primary?).



Grabbing for straws here....