Spark plug #4, For Art Options

[Defgeph]

This is spark plug 4

[lagos]

ive been dealing with some odd lean issues on my car the past few weeks. having a wideband in the car, really opens up your eyes. so far, i found 2 things that were affecting my a/f ratio. 1st one was that i had a fuse tap running from the ignition fuse to power my gauges and other car electronics. i added the wide band to that, and out of nowhere i started getting detonation at almost any boost level above 10psi. turns out, that your ignition fuse is what powers your injectors, fuel pump, etc.. and this was causing some type of current draw, and not giving the power the injectors needed. moved the fuse tap over to the cig lighter fuse, and that problem went away.

the other thing i found, is that i had a TINY air leak in my intake piping. i didn't even know it untill i noticed it while boost leak testing through the intake. after fixing it my a/f ratio got more rich. so you might want to look into those 2 things.

here is a pic of my plugs. its kind of old. from 5.26.06. you can see too much heat on them. this is mostly from the advanced timing in the jdm ecu's. you can also see cylinder 3 looking a lot leaner then the rest of them .




now these next ones are from a few weeks ago, after fixing some things. you can tell they look a lot better then the 1st set. you can clearly see how plug 1 and 4 are more rich then 2 and 3. this is what im hoping to find out if the ats rail fixes. if it does, i would buy one.



This post has been edited by lagos: Oct 8, 2006 - 11:48 PM