TheDice951

well, some of you have helped me figure out my running issue I had with my car that the new coil fixed. I was hoping it would fix my Rich issue. it didn’t. when I do "spirited" driving it smells strongly of fuel and somewhat burns my eyes.... it also backfires when I shift. I turned the fuel pressure down from 35psi at idle to 30 psi at idle and seems to not have had an effect on it at all....

I know there is an adjustment in the computer for the fuel but I don’t know enough about it to mess with it.

I replaced the O2 sensor trying to fix the old problem and it didn’t change from before... this has been going on since I bought the car so I don’t know what the PO did to it... I have vettesse software and a gt30r turbo with 55# injectors

any help is appreciated

schip43

Wow, can you data log, do you have a WB or NB AFR gauge? AF ratio at idle and part throttle should be 14.7 and dither from there and in the 11's at wot, I'm in the 10's so mine is rich there but 14.7 at idle and PT.

Someone that knows way more than I will ask these questions anyway so you might as well get it out of the way.

fast951

MAF ground connection, incorrect FQS setting, Vacuum leaks, Engine Temp sensor, dirty MAF, faulty injectors,... all will cause a rich condition. I'll check each till I find the problem...

carlege

how long have you noticed it running rich?

User 41221

^+1 What John said. I'd suggest putting the adj FPR back to 3bar, and then work through the checklist in the order John listed, since it should be at 3 bar if operating properly and not having it set properly might mask the issue.

Did you get the Vitesse instructions/documentation with the car when you bought it?

TheDice951

well I have checked for vacuum leaks, I have none. I have replaced the DME temp sensor. I have cleaned the MAF. so I will check the ground and the injectors but what do I do with the FQS?

I cannot data log, I have a NB AFR gauge

I have had the rich problem since I bought the car and no instructions came with it... I have an extensive service history but no instructions....

schip43

NB is fine for running WB for tuning so AF at idle PT and WOT should be 14.7 ish idle and PT and rich at WOT.

carlege

I Personally think its the MAF and the chip might be just tuned rich. But you could also need to clean your grounds.

fast951

You should see 14-15:1AFR at idle in closed loop (same as factory). Under boost you will see around 11.5:1 AFR.

As far as the FQS settings, they are unique per setup; too bad the original owner did not provide you the documents. Since you have 55# injectors, I'm assuming your setup is at least 5-6 years old? Do you know the chip/board number?
For now, set the FQS to position #0 (left counter clockwise) and your FP to 3bar and go from there.

TheDice951

the set up was installed in 2001.

your chip says "vitesse inc." "REV1.0, 2k/4k/8k, 8-32k" and the FQS was on "0" already?

the back also has writen "JJ 6/5/01"

fast951

Email me a picture of the chip front and back, and a picture of the MAF sensor itself, maybe it rings a bell.

TheDice951

i will have to do it later... i have to go to work... thanks for the help

TheDice951

fast951, i emailed your "sales" email from your site. thats the only email i could find for you. i sent the pictures asked for.... thanks

fast951

I replied earlier. Check your email...

JFreeman

I thought shooting flames was pretty cool...