Fast 90mm Throttle body fix?
03-31-2005, 09:26 PM
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Fast 90mm Throttle body fix? I have searched and cant find a fix for the fast throttle body problems.. IS there a fix? My car drives and accelerates no problem, but it likes to idle at 2k.. If i tap the gas it sometimes goes to 1.5k. After sitting for a min it might or might not go back down. It always idles fione at start up.. its only when i am drving around and stop..
03-31-2005, 11:04 PM
#3
Let's see...there is the "peen mod" where you dent the housing around the rim of the bearings to keep them from walking out of their pockets...refer to your stock TB, its bearings are peened.
There is the "drill mod" where you remove the throttle cam set screw, mark it's location on the shaft, remove the cam, drill a slight indentation in the shaft to allow the set screw to set into the shaft.
Hold the TB up to a light source and look for an even clearance between the throttle blade and housing...if you can't see light all the way around, then the blade may be scrubbing the bore, causing the blade to stick. I used sand paper to smooth down the areas of the blade that were scrubbing the bore.
Mikey at Rapid Motorsports recommends puting some electrical tape on the throttle shaft where the TPS slides on to "tighten up" the fit of the TPS on the shaft. He also recommends slotting the TPS mounting holes to allow it to be rotated to adjust for proper voltage readings. Check out these threads:
https://ls1tech.com/forums/showthrea...=FAST+TB+fixes
https://ls1tech.com/forums/showthrea...highlight=fast
There is the "drill mod" where you remove the throttle cam set screw, mark it's location on the shaft, remove the cam, drill a slight indentation in the shaft to allow the set screw to set into the shaft.
Hold the TB up to a light source and look for an even clearance between the throttle blade and housing...if you can't see light all the way around, then the blade may be scrubbing the bore, causing the blade to stick. I used sand paper to smooth down the areas of the blade that were scrubbing the bore.
Mikey at Rapid Motorsports recommends puting some electrical tape on the throttle shaft where the TPS slides on to "tighten up" the fit of the TPS on the shaft. He also recommends slotting the TPS mounting holes to allow it to be rotated to adjust for proper voltage readings. Check out these threads:
https://ls1tech.com/forums/showthrea...=FAST+TB+fixes
https://ls1tech.com/forums/showthrea...highlight=fast
04-01-2005, 01:20 PM
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That's unbelieveable...to have to have to all that trouble on such an expensive part. FAST should be ashamed of themselves for not fixing all these problems by now 
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04-02-2005, 07:26 AM
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Send it back to FAST. Mine had all the issues and they fixed it free. Took 3 days total from me shipping it tilll I got it back. This is my 3rd rebuild now and it finally works good.
04-02-2005, 08:16 AM
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i picked this throttle body and intake up used and the only problem i seem to have is sticking open a little after it warms up.. will they take it back with no receipt or proof of purchase? looks brand new only about 2k miles on it
04-02-2005, 09:25 AM
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I stand behind everything I sell. I am going to look for my recipt. Hopefully I have it and I will send it to you. I did not have this problem. I will look for it. You could just call fast and talk to them about it. Its that easy trust me.
04-02-2005, 11:24 PM
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Originally Posted by JMBLOWNWS6
I stand behind everything I sell. I am going to look for my recipt. Hopefully I have it and I will send it to you. I did not have this problem. I will look for it. You could just call fast and talk to them about it. Its that easy trust me.
04-03-2005, 06:06 PM
#19
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Originally Posted by SOM WS6
I take back my statment. Took the bird out for a drive today and the damn thing still hangs up.
The FAST is a total POS.
04-04-2005, 10:17 AM
#20
I would send it back to fast. Call them and speak to Hadley Owens and let him know what is going on.
FWIW, I had to send 2 back. The 3rd has been on for 2 weeks and is now working fine (it stuck on the first drive after install but has not stuck since then). I wrapped the TB shaft with electrical tape to insure a tight fit to the TPS. I get very accurate TPS readings and no sticking.
FWIW, I had to send 2 back. The 3rd has been on for 2 weeks and is now working fine (it stuck on the first drive after install but has not stuck since then). I wrapped the TB shaft with electrical tape to insure a tight fit to the TPS. I get very accurate TPS readings and no sticking.