F.A.S.T intake manifold and throttle body , with Pro Charger S/C problem
12-05-2011, 07:23 PM
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F.A.S.T intake manifold and throttle body , with Pro Charger S/C problem I recently had a Procharger super charger, F.A.S.T 90mm intake manifold and throttle body installed on my 1999 WS6. I am having issues with the throttle body not wanting to close fully when letting off the throttle ( rpms hang at low speed , if you tap throttle a little when this occurs rpms come down to normal) Contacted FAST and they said they were aware of a problem with spring in throttle body,so I sent throttle body to them to replace spring. I got the throttle body back and it still does the same thing. Contacted FAST again and they told me there must be something else causing this issue now. My WS6 has traction control on it. Anybody have any ideas to solve problem? Could the throttle cable just need cable lube? My car is in storage for the winter so thought I would try to come up with some ideas to try in the spring.
12-05-2011, 10:18 PM
#2
I recently had a Procharger super charger, F.A.S.T 90mm intake manifold and throttle body installed on my 1999 WS6. I am having issues with the throttle body not wanting to close fully when letting off the throttle ( rpms hang at low speed , if you tap throttle a little when this occurs rpms come down to normal) Contacted FAST and they said they were aware of a problem with spring in throttle body,so I sent throttle body to them to replace spring. I got the throttle body back and it still does the same thing. Contacted FAST again and they told me there must be something else causing this issue now. My WS6 has traction control on it. Anybody have any ideas to solve problem? Could the throttle cable just need cable lube? My car is in storage for the winter so thought I would try to come up with some ideas to try in the spring.
12-06-2011, 01:09 AM
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I recently had a Procharger super charger, F.A.S.T 90mm intake manifold and throttle body installed on my 1999 WS6. I am having issues with the throttle body not wanting to close fully when letting off the throttle ( rpms hang at low speed , if you tap throttle a little when this occurs rpms come down to normal) Contacted FAST and they said they were aware of a problem with spring in throttle body,so I sent throttle body to them to replace spring. I got the throttle body back and it still does the same thing. Contacted FAST again and they told me there must be something else causing this issue now. My WS6 has traction control on it. Anybody have any ideas to solve problem? Could the throttle cable just need cable lube? My car is in storage for the winter so thought I would try to come up with some ideas to try in the spring.
12-08-2011, 09:29 PM
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cracker - what other info do you need? I had my car dyno tuned at a place called West Bend Dyno tuning and performance. I heard nothing but good things about this shop from friends that went there, they to thought it was something to do with TB s internals.
12-08-2011, 10:15 PM
#6
I recently had a Procharger super charger, F.A.S.T 90mm intake manifold and throttle body installed on my 1999 WS6. I am having issues with the throttle body not wanting to close fully when letting off the throttle ( rpms hang at low speed , if you tap throttle a little when this occurs rpms come down to normal) Contacted FAST and they said they were aware of a problem with spring in throttle body,so I sent throttle body to them to replace spring. I got the throttle body back and it still does the same thing. Contacted FAST again and they told me there must be something else causing this issue now. My WS6 has traction control on it. Anybody have any ideas to solve problem? Could the throttle cable just need cable lube? My car is in storage for the winter so thought I would try to come up with some ideas to try in the spring.
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12-09-2011, 06:34 AM
#8
The FAST 90mm intake manifold is also prone to leaking or cracking under boost. If it were my car I would get rid of both the intake manifold and the throttle body, and either go with an LS6 intake or find a used FAST 92 intake or buy a new FAST 102 intake, and go with a newer FAST throttle body. Bob
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ATI ProCharger and Moser Sales 260 672-2076
PM's disabled, please e-mail me
E-mail: brutespeed@gmail.comob@brutespeed.com
https://brutespeed.com/ Link to website
12-09-2011, 04:39 PM
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thanks unfortunately I sold the stock tb and intake manifold to a friend at about the same time I had the FAST ones installed. I think I might look in to a different weight spring ( I tried using a small spring already but didnt seem to work). Other wise LS6 intake manifold, TB is probably the way I am headed. thanks
