Thread: which cantuned pcm can be tuned after install?

55-130 in Lightly Modded GTP - YouTube
I would like this. I have, maybe, maybe a few connections to wrecks from Illinois. What do you guys think? Even close of what I'm dreaming, or just start over with a new car?

and what's up with that? Listen to motor, watch tach........... Why?

It's been a while since I've been on here, and my car has mostly been sitting, but I have done some research. It's nice, and essential, having tools that can help with diagnostic, but if you don't know what the #s mean, you need to figure out what they mean.

I found that I was almost always getting a negative short fuel trim when I was on the gas, showing pcm was trying to subtract fuel. (or add more air) (cant do that but did average out
and so dumbly, I found that with the wet weather, the makeshift ram air I made, which worked great before header install in warm weather, had mudded up my cone filter. I mounted a cone filter inside factory intake box, moved engine intake air sensor to the fender in pvc, (will read only OA, and run richer because it isn't picking up heat from engine, and exhaust crossover) and had installed an unnecessary breather on oil filter cap.(sometimes helpful under heavy boost) With 15*oa I was getting horrible gas mileage, and with headers was getting terrible suction turbulance. With the cone filter in the air box, my negative static with ram air must have been quite high.

What I will be running now is the factory air box with a square k&n with polished metal 90 to throttlebody. Maybe I will move filterbox closer to throttlebody, and run my additive air runs before filter intake.

As for running, much better. Less suction vibration, and way better operation.
As I stated before, was getting downshift from factory at 28mph, with headers, 32mph, and with open cone, the way it is right now, 38mph
Highest ignition advance now is 38* from 31* Right now, as is almost 10psi max with stock pulley, but only in certain conditions. Averages about 5-7psi
I have not reset fuel trims.
The motor, and trans is begging for more, but my pcm will only do so much stock.
The next thing I will do is a smoke test to check for vac leaks to make sure fuel press regulator isn't overfeeding due to small top end hose leak.
I still have to put up some pics which I will do very soon.

If you are like me, and don't wrench anymore, theese leads may help you.
http://www.magnaflow.com/07techtips/...in/TB80010.pdf
Supercharger Tuning - Timing Trends - Part 1 of 4 - YouTube
Supercharger Tuning - Timing Trends - Part 2 of 4 - YouTube
Supercharger Tuning - Timing Trends - Part 3 of 4 - YouTube
Supercharger Tuning - Timing Trends - Part 4 of 4 - YouTube
http://www.grandprixforums.net/what-...here-1507.html
Safely Modding Your 3800 Powered Car [Archive] - 3800Tech Forums

RPM Surging Between 2000 - 2500 RPM Grand Prix - Car Questions, Answers, and Discussion
http://www.grandprixforums.net/heade...ead-25922.html
Using fuel trim and freeze frame data to determine type of lean condition - YouTube
How to set your ignition timing - YouTube
No code misfire - YouTube
Using Fuel Trim to ID type of lean condition II - YouTube

If what I posted could help, than I am still endebted unto those who have wrote things to help me
Dave

http://www.grandprixforums.net/how-i...hod-44126.html

Thanks again bill

and this ones for you ffdp
Five Finger Death Punch Far From Home - YouTube
thank you

what would you do with this car? I'm shure less than 400 miles since my first post? Move on to another car should I screw around? The car runs great,,,,,i know it kneeds a battery..........forget it, or run it? if you guys could give me some compression readings it would be awsome. If not, this car will haull as s ss as it sits. Ready to go.....no..where.

This info may be helpful..... the car is started every day with no issues, run to t-stat open, maybe drive for a few miles, then turn off.