My plugs just came out after about 2k miles and they look nearly new. not light tan or anything...like new. I'm assuming it is running lean though I haven't been able to scan it since my laptop is down.

BUT, I get pops through the exhaust sometimes when I let off the throttle. Almost like a rich condition as unburnt gases ignite in the exhaust.

Any thoughts?

 

mine does this too and I am almot 100% positive I am running rich. I await some responses with much trepidation

 

were your archs on your plugs kinda of a whitish color?
Mine were because I was running in Speed density mode causing me to run a little lean, I never had a popping problem though at that time due to the lean conditions.
Now I get a MAF that works and I down shift to slow down and I get all kinds of popping action...I am guessing the MAF richened up my mixture a little...thats just my take on it, I am not going to know anything until I get my car re auto tapped...

 

That's one of the downfalls of removing the cat/cats. I used to pop like pocorn untill I installed longtubes. It will still pop, but not nearly as frequently.

Chris

 

I've read its more backpressure related then rich/lean.

 

I've been told many times that The Popping coming from the Tailpipe was just Air getting into the Pipe before the Muffler.

 

I get it too when let off the gas; backfiring is usually due to a lean condition although I'm pretty sure she's running rich cause my mpg has fallen considerably.

 

Taken out of context = LMFAO!