jjfrehe

Hello everyone - I have some excessive pinging on my 03 GT, so I figured I would retard my timing to help things out - at least temporarily. However, using a Diablo, I cant get the timing below 16-18 degrees. I even retarded the spark advance via the Diablo to the lowest setting and it still is at 16-18 degrees. On acceleration it will pop to mid-high 20's.

Any ideas what would be causing this?

I dont have any codes (yet).

BCisme

what kind of gas are you putting in it?

jjfrehe

93 Octane

BCisme

how long has it been doing this? you probably need to have a proffesional tuner tune your car.

jjfrehe

Its been doing this for about two weeks - ever since I got my MAC Prochamber installed (I am assuming coincidence).

I agree about the pro-tune.

bull2368`

you need to adjust the a/f richer if you are getting detonation. and you also need to get to a dyno to check your a/f

04BlueGT

With the new prochamber, my guess is an O2 sensor problem and a/f mixture.

IeatRICE

That's weird i have mine set all the way up on my diablo tuner try putting the stock back on it, then do the performance tune again it sometimes takes a bit for the comp to get used to it.

jpmustanggt

what exactly does pinging sound like?

Voodoo

+1 Very possible you have a problem with the front O2 sensors. They have to take them off the old exaust and put them behind the Prochamber. I wonder if they broke one or hooked them up wrong.