Need help Having problems with boost
Thread Starter
Racer
Joined: May 2007
Posts: 266
Likes: 5
From: stony plain AB
Need help Having problems with boost
I need your help guys, I got my car dynoed yesterday and we did at least 30 pulls. It was running awesome on the dyno. Today I take it out for a rip and as soon as I get into boost it starts to surge and buck and runs like crap. If you dont go into boost it runs fine and will rev up to 6000 rpm like nothing. I still have the maf and the car is running 10 #s of boost. I do have the maf girdle from A&A.
I am using HP tuners and it is not throwing any codes and everything appears to be good. It's like it is loosing a signal somehow but I don't know where. The map and maf are working fine compaired to the dyno runs. It sounds like it has a revlimiter coming on when you push the pedal just a little to hard
Thanks for anyones help Rob...
I am using HP tuners and it is not throwing any codes and everything appears to be good. It's like it is loosing a signal somehow but I don't know where. The map and maf are working fine compaired to the dyno runs. It sounds like it has a revlimiter coming on when you push the pedal just a little to hard
Thanks for anyones help Rob...
Burning Brakes
Joined: Sep 2004
Posts: 1,089
Likes: 4
From: Ocala FL
I need your help guys, I got my car dynoed yesterday and we did at least 30 pulls. It was running awesome on the dyno. Today I take it out for a rip and as soon as I get into boost it starts to surge and buck and runs like crap. If you dont go into boost it runs fine and will rev up to 6000 rpm like nothing. I still have the maf and the car is running 10 #s of boost. I do have the maf girdle from A&A.
I am using HP tuners and it is not throwing any codes and everything appears to be good. It's like it is loosing a signal somehow but I don't know where. The map and maf are working fine compaired to the dyno runs. It sounds like it has a revlimiter coming on when you push the pedal just a little to hard Thanks for anyones help Rob...
I am using HP tuners and it is not throwing any codes and everything appears to be good. It's like it is loosing a signal somehow but I don't know where. The map and maf are working fine compaired to the dyno runs. It sounds like it has a revlimiter coming on when you push the pedal just a little to hard
Thanks for anyones help Rob...Also, mine will exhibit those symptoms if I forget to turn off the traction control.
Race Director
Joined: Dec 2003
Posts: 12,599
Likes: 1
From: Texas
What kind of fuel system? Mine although only 6-7 pounds acted the same way and I found out my fuel pump was weak. As long as I was out of bigger boost (under 5k RPMs) car would drive perfectly fine. Once boost started coming up it would fall on its face. Checked fuel pressure and it was 45 psi and with the BAP on it was only 50. Once I get my P1 back I am getting a fuel system upgrade. Maybe a blown fuse on the BAP if you are running one.
Just a thought, good luck!
Just a thought, good luck!
