when i floor it, it stumbled like crazy ... why?
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Joined: Jul 1999
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From: Houston
when i floor it, it stumbled like crazy ... why?
I just got my car back last night, and it drives/idles decently. The problem is when I get on it, it stumbles like crazy. I was told I might just need to run a tank of gas through it, but am not sure if that will fix it. Has anyone had this issue before? What could it be?
Joined: Sep 2003
Posts: 25,895
Likes: 429
From: Pittsburgh PA
Car: 89 Iroc-z
Engine: 555 BBC Turbo
Transmission: TH400
Axle/Gears: MWC 9” 3.00
Re: when i floor it, it stumbled like crazy ... why?
Its probably the tune. With the blower on, its likely going lean. Its hard to say without knowing whats in the car and whats been done to the tune. If its an FMU setup or not, and if its an FMU, whats the pressure rise ratio on the fuel when boost is added? Lots of variables here. Could also need better ignition and tighter plug gaps if seeing boost.
Joined: Sep 2003
Posts: 25,895
Likes: 429
From: Pittsburgh PA
Car: 89 Iroc-z
Engine: 555 BBC Turbo
Transmission: TH400
Axle/Gears: MWC 9” 3.00
Re: when i floor it, it stumbled like crazy ... why?
It runs ok for what it is 
Will be quicker next year tho..hopefully if all goes well.
Will be quicker next year tho..hopefully if all goes well. 
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