I installed my greddy kit the other day and got it tuned. It was running fine until today it threw a bunch of engine codes all of which were missfires. i put good plugs in and it only had one cylinder three misfire code. so i switch coilpacks on 3 and 1 and it said misfire cylinder one so im figuring its the coilpack, does this make sense? also a greddy kit ona stock motor can make 10Ibs at 300hp right? mine would only make 6 and they said it was because of the cat is stock . but i found a leakin in the line on the secondary air sensor will this fix it? turbo and everything is good

 

Sounds like a timing issue. I would talk to your tuner about this. Even though it might have been "tuned", some tuners wont tune all cells within a map. If some cells were left with the base map that Greddy provided, changing a bunch of cells without actually moving the vehicle into those cells or interpolation is at such a large gap that the computer must use something inbetween the given parameters. I'd suggest taking it back to your tuner and seeing if he can identify any problems.

 

If you moved the coil and the problem follows the coil then yes it's bad. I would do that first. I'm surprised your tuner didn't tell you about misfires on the dyno though.

 

[QUOTE=oklahomaS2K,Jun 13 2010, 01:27 AM] I installed my greddy kit the other day and got it tuned.

 

I'm going to go w/the simple fix.

Plugs.

Replace w/on step colder, and check gaps.