im thinking about getting a S-AFC...im working with a stock fuel system...would there be any significant difference when working with one...also im running lean..the spark plugs were tan color...i need to iron this problem out...would that fix the prob....?

 

running lean is baddddd mk?
lol
get a fuel pump immediately, that should richen it out a little bit for you. with the SAFC u can add more fuel so yes, the SAFC would help u with ur problem....

 

No matter what color your plugs are I'm not so sure your running lean. An NA with a catback, intake and hi-flow cat shouldn't be running lean.

 

I agree with this cat. Its hard to make an N/A run lean.

 

well when i first got the car..pops took it to get a diagnostic check...and came back and said it was running lean...and im assuming it still is...im not sure....

 

when he had it checked did the car have an exhaust leak? if it did that would be the reason it was showing lean.

 

Well I've never heard of a diagnostic check using a wideband O2 sensor. Are you talking about one of those $50 ones at like a local Pep Boys or the such?

 

there is no way the car is running lean. your plugs are supposed to have that color to them not to black not to white and a little specled(sp). a cat-back would richen the mixture. where did you take the car for the diagnostic??

also, if you want to see if your running rich or lean you can hook up a multi meter to the O2 sensor and to ground. the reading should be between .95-1.0 V

ryde,
they could have used an exhaust gas analyzer to see the mixture(did this yesterday)although it's not as accurate as a wide band, tuning wise. but, it gets the job done for the most part.

 

Ya but rotaries exhaust is hotter than a piston engines, which would lead a regular shop to think that its running lean, right?

 

well ive noticed that i have an exhaust leak...i dont think ive always had it..but it sounds like its coming from the manifold...i replaced the midpipe gasket...still leakin..whys that i was planning to get the AFC plus header..