Forced Induction 00 kenne bell bucking issues

[mikemora01]

Hey guys my buddy has an 2000 gt with built mmr block and kenne bell 2.1L blower. The fuel system was upgraded by a shop and tuned by them but the car always ran horrible and the shop is impossible to deal with. they will not return calls or willing to look at the car. He went ahead and put the cobra tank with dual fuel pumps since the fuel pump the tuners put in went bad and it never ran right anyways. Now the car has some extreme bucking when he gets on the throttle. Do you all think it needs to be retuned again? or could it be another issue such as MAF, O2 sensors, fuel system? the car also does not idle smooth it seems to surge a bit. Car put down around 485hp and 535 torque at last dyno. Just looking if he should take it to another tuner or do some trouble shooting first.

 

[bhuff30]

Checking for codes would be a good start on the bucking issue. And from what you've said, it doesn't sound like a shop I would want to do business with. I'd look around for someone else.

 

[trinity_gt]

What plugs is he using and at what gap?

I assume with that setup he has a wideband AFR gauge: What does it show when he gets into it?

 

[Jhussey1280]

If you can pull some codes that's a great start to any troubleshooting. Personnally if he has the money I'd say find another shop. It sounds like the shop that did it really didn't have a clue. There could be more issues that turn up and you don't want to keep throwing money at every random problem that comes up. If you can get it all figured out in one go, it has to be cheaper than picking them apart one by one. Don't get me wrong I love doing my own wrench work, but if you're not sure what's been done to the car, then another opinion from a better shop would prove invaluable.

 

[2002BLGT]

Look around for another tuner to take it to would be my advice

 

[KB00GT]

My car (with a KB also) had very much the same issue...it was the MAF, i had unplugged it while messing with the intake and when i plugged it back in i failed to make sure the plug was seated all the way in , so it had a bad connection ...pushed it back in all the way, problem solved