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just installed slp runners and car ideles crazy high

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Old Mar 11, 2008 | 09:30 PM
  #1  
NEWMAN1786's Avatar
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Joined: Mar 2008
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From: Upper Marlboro, MD
Car: 91 z28, 92 rs
Engine: 350 zz4, 305 tbi :(
Transmission: 700r4
just installed slp runners and car ideles crazy high

i just installed slp runners the car idles crazy high like 5000 rpms? what the heck did i do wrong
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Old May 28, 2008 | 11:39 PM
  #2  
JekyllandHyde's Avatar
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From: NY
Car: 87 Trans Am GTA
Engine: 350 TPI
Transmission: 700R4
Axle/Gears: 3.27
Re: just installed slp runners and car ideles crazy high

You probably had the same problem as me, only I caught mine before it could potentially turn into a problem. On my SLP runners, I assembled the whole TPI on my workbench to make sure everything fit and all my port work matched up. Lo, and behold, I noticed some light peeking through at some spots where the runners mate with the plneum even with the gaskets on. Turns out my flanges were warped ever so slightly. Enough that it was causing a leak, but you'd never be able to tell up close. had I thrown it on my car, my car would be revving high just like yours does.

Two options, you can either have your runners milled down or do what I did, apply RTV to both sides of the gasket to seal everything up. It'll make for a real fun job when I need to reomve everything next time around, but at least I got no leaks. I hope this helps.
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Old May 29, 2008 | 06:45 PM
  #3  
87zjeff's Avatar
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From: louisville, ky
Axle/Gears: '01 3.42 10 bolt
Re: just installed slp runners and car ideles crazy high

5000rpms??????? are you sure about that? 5000rpms is almost the equivalent of having the gas pedal pushed to the floor.....or no throttle body.

check your throttle body blades to see if they are hanging oped due to a mis-aligned cable.
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Old May 29, 2008 | 07:40 PM
  #4  
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Re: just installed slp runners and car ideles crazy high

huge vaccum leak
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Old May 29, 2008 | 11:15 PM
  #5  
SDIF's Avatar
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Joined: Oct 2003
Posts: 544
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From: Aiken, SC
Car: 91 Z/28, 89 RS Race Car
Engine: 305 stock / ZZ4 AFR 195 9.7:1
Transmission: T5 / t10 / Jerico
Axle/Gears: 10blt w 3.42, 9 in w /3.80 DL
Re: just installed slp runners and car ideles crazy high

Make sure the runners are not crossed. I think there is a right and a left side.

You have a vacume leak.
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