Does anyone have a DynoJet dynograph from a GXP Auto they could post. Also if it was on a 224 or 248 model.
Here is my other thread about what is going on with the car.
GMPP dyno results, not impressive AT ALL
There was a P0341 Camshaft Position code set, GM called it a "ghost" code they know about but can't figure out why it is set or how to keep it from coming back. The TAC "expert" said if it comes back again, to take it to a Pontiac dealership so they can compare the engine parameters with another GXP. Which in my book is BS, so much for being a Tech Assistance Center. Also the TAC has NO information about the GMPP tune or could provide any help on it to the Tech.
The Service Tech first used an over the air device vice the Tech II to load the program and it may have had an error, yesterday he loaded it using the Tech II as a pass-thru and it is a little better.
But getting it on the dyno today it's still not making the HP/TQ I believe it should. The new best was 225.40rwhp and 216.34 Tq which seems really low compared to other dynographs I have seen on here, but they are manual cars.
Trying to figure out what exactly is going on with the car. Here is the latest dynograph. Comments are always welcome. Sort of feel
and
Oh yea, after this set of pulls, we changed the stock exhaust out on the dyno with the Magnaflow catback and lost HP/TQ.
The other thing I have noticed on the dyno you have to beat the living snot out of it to make good power, takes 5-8 pulls before it will lay down it's best numbers. What is that about? Then after it makes it's highest number the AFR goes rich and power drops.
