The only reason Im not putting this in the turbo forums is because Im not turbo'd, yet.
Is there a way to mess with the map sensor with the SAFC to raise the vacuum a little? Im runnin roughly 400mmHg @ 5,6,and 7.Checked for leaks, even used compressed air and found nothing. It runs fine, actually runs great. Its just if I sit at idle for a lil then take off, when I hit about 2k the car jerks a lil and a puff of black comes out. Now Im assuming that leftover fuel from sitting at idle and running such low vac, the ECU was tryin to compensate.

Am I way out in left field or does someone know of a fix?

Thanx, as always
DJ

400 is about where you should be.

It sounds like your just running too rich.

Joel Baldridge, ASE Certified Master Technician, Audi Certified Expert Technician

and how do I fix that? I am running a SFMU and the SAFC. That the only two ways I know of to mess with the fuel but dont know how!!

DJ

Well you can either lower your static fuel pressure on the SFMU, or lean out the low throttle fuel trim on the SAFC. It would help if you had a logger to see what your short and long term fuel trims were.

Joel Baldridge, ASE Certified Master Technician, Audi Certified Expert Technician

So even though I have my SFMU set at stock pressure, which is roughly 48, I can still lower it?

DJ

Yes.

What size injectors do you have?

Joel Baldridge, ASE Certified Master Technician, Audi Certified Expert Technician

Im still runnin the stockers.

Just lower your fuel pressure.

You need a logging device to make sure your o2 voltage and fuel trims are within range so you don't damage anything.

Joel Baldridge, ASE Certified Master Technician, Audi Certified Expert Technician