Crazy Eddie

I was having a lean issue
When the car got warm and in certain RPM ranges the car would go lean, as shown on the Wide Band O2 sensor ...
We (Tom and I )were scratching our heads wondering what the hell was wrong ??
First we thought the coil, maybe the coil was bad so we pulled out the coil and replaced it with a known working coil.
Then we pulled the brand new plugs and replace those....
Then the fuel regulator
Then I pulled the injectors ... and Tom was kind enough to loan me a pair of stock injectors and he modified the maps so we could run them
Turns out the new fuel injectors were the cause !!!
I only ran 13 psi of boost on this last run today ... This car is SICK !! "It's the sound the people kill for" :-D
I love this Vitesse kit!! This is a whole new car ..
I still have the stock cat ( that's another 15- 20 HP and 2 -3 pounds of boost before I go into the race gas territory... ;-)
2nd gear full boost must be like crack is to an addict !!
Sad I have to dismantle the car again for this rear main seal
Big thanks to Tom for helping on this. I am a happy man right now !!!
Ed

Van

Glad you solved the problem! Sounds like what Techno Duck is going through... Hopefully he'll see this thread.

Tom M'Guinn

How do we know this car even exists without some pictures?

Tom M'Guinn

By the way, here is what the zeitronix looks like with the bad injector(s). The arrow points to how the AFR just jumps up for no reason while the throttle is down. The other chart shows how choppy the AFR was when the failure was most pronounced. Thought these pictures might be helpful to someone in the future if they have similar issues...

Crazy Eddie

Thanks Van
Ya know, Josh had a similar issue and turned out, his was caused by the injectors as well
Hopefully this will help Jon


Ya ya ... I will be posting I took Jr. for a ride ... He was blown away !!
Sharp boost is the only way to go.....
Tom .... Your turning me into a boost-a-holic

Techno Duck

I was sure my problem was injector related.. tried 3 different sets and it was not the cause unfortunately.. Thankfully i do think i have it figured out, i believe the pressure damper was my issue. Took it apart and the diaphragm was not installed correctly. I have the stock rail on the car now and have put about 300 miles on it over the last few days, lean spot has not come back once and the car is running fantastic.. i am actually working on tuning it right now (finally!). Have not had the chance to update my thread.. have a replacement damper coming in from Dave Wednesday.