Hoping i can find some help. First the specs
07 GXP w/ 50k miles
Solo high flow cat
Solo RCD exhaust
19in Gravana staggard wheels
Did i mention the car is matte black?!?!
Back on topic... I was driving home on a neighborhood street going 35 mph or so. Out of no where the traction light comes on and in the dash it reads the following:
"reduced engine power"
Now the problem has become a reoccuring issue. When maintaining a constant speed I feel the engine let up slightly for a brief moment and then return to holding speed. My rpms dont seem to change at all and speed holds +- 1 mph. It will do this several times over a couple minutes and then throw the "service traction" lights. I notice this because i can feel my body move forward as it lets up. Its not my foot because i can feel the same effect when i set the car on cruise control. As a matter of fact the problem occurs more often when i am in cruise control.
I took it into my usual GM dealer to service the problem. They return the next day saying it was the throttle sticking causing the computer to go out of whack. Car ran fine for about a 3 days and the problem returned. I took the car back and it has been at the shop for about a week now. They think its a computer problem.
Naturally i start thinking it could be fuel pump/filter/injector or spark plugs, but they seem confident its not a mechanical issue. Either way when it goes into "reduced engine power" the boost is eliminated and acceleration is severlly reduced. I could be all the way into to peddle and it will only accelerate slowly.
Any input on the matter would be much appreciated.