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Joined: Jun 2005
Posts: 129
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OP
CEG\'er
Joined: Jun 2005
Posts: 129 |
I just installed my opt. TB last night, and I LOVE the new found power. I'm guessing at LEAST 4 whp with the other modifications I have already. Unfortunately, when I take off in first gear and punch the rpms up to 4-5 grand, my rpms DON'T fall back down when taking it out of gear.
It freezes at the last rpm when I take it out of gear. In fact, the ONLY way I can come to a stop is by putting it back in gear and using the gears/clutch to slowly pull the rpms back down to idle. In fact, my car is idling at 2500 rpms. When I pop the hood, I can push the throttle piece w the coil/spring down and it will cause the car to fall back down to normal idle (1000 rpms).
It seems as if the plastic piece with the spring rapped around it is sticky or something and is having a hard time rotating. Other than that, does anybody else have any ideas why my rpms won't drop back down when I put the car in neutral. Matter of fact, when I rev it up in first gear and before I shift into second, my rpms will actually CLIMB up on their own a small bit before I shift to second.
'98 CSVT Black
-AEM short-ram intake
-Optimized TB
-Optimized y-pipe
-Magnaflow cat-back
-B&M short-throw shifter
-UD pulleys
-Poly mount
"It's quicker than it was stock!"
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Joined: Mar 2003
Posts: 2,676
Hard-core CEG\'er
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Hard-core CEG\'er
Joined: Mar 2003
Posts: 2,676 |
Did you rest the computer? Also the IAC can get stuck.
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Joined: Jun 2005
Posts: 129
CEG\'er
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OP
CEG\'er
Joined: Jun 2005
Posts: 129 |
I have pinpointed the problem as a bad spring in the TB. It seems to not have enough return tension to force the butterfly plate closed all the way, and sometimes doesn't have enough tension to even bring the rpms down. As a matter of fact, I was wondering why my gas pedal seemed so light and easy to push to the floor. As far as I know, this is the problem and I aim to fix it tonight by switching the opt. butterly plate, shaft, and screws into my old TB housing. Which, in turn, has always had an operable tension spring.
'98 CSVT Black
-AEM short-ram intake
-Optimized TB
-Optimized y-pipe
-Magnaflow cat-back
-B&M short-throw shifter
-UD pulleys
-Poly mount
"It's quicker than it was stock!"
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Joined: Sep 2000
Posts: 4,693
Hard-core CEG'er
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Hard-core CEG'er
Joined: Sep 2000
Posts: 4,693 |
A dirty throttle body can cause the throttle plate to bind as you are describing. Pull the air intake tube away from the throttle body and take a look. If it's dirty, clean it. If you havn't cleaned it in the last 15,000 miles or so, clean it anyway.
Jim Johnson
98 SVT
03 Escape Limited
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Joined: May 2006
Posts: 74
CEG\'er
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CEG\'er
Joined: May 2006
Posts: 74 |
i had the same exact problem with my csvt. it was my IAC. it costs about $50 and takes only mins to put in.
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Joined: Feb 2006
Posts: 512
Veteran CEG\'er
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Veteran CEG\'er
Joined: Feb 2006
Posts: 512 |
Originally posted by SVTJON87:
i had the same exact problem with my csvt. it was my IAC. it costs about $50 and takes only mins to put in.
Don't buy a new IAC until you try to clean the one you have! Save the $50. There is plenty of info out there on cleaning your IAC.
Jeff
For Sale - 96 Tour Sport 2.5L MTX with SVT Exhaust, pre 98 trunklid with newer Contour Sport spoiler instead of lip spoiler, newer Contour sport rims. Newer paint job. Brand new floor mats. Rust Free! PM me for details and pics.
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Joined: Aug 2002
Posts: 853
Veteran CEG\'er
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Veteran CEG\'er
Joined: Aug 2002
Posts: 853 |
Originally posted by Big Jim:
A dirty throttle body can cause the throttle plate to bind as you are describing. Pull the air intake tube away from the throttle body and take a look. If it's dirty, clean it. If you havn't cleaned it in the last 15,000 miles or so, clean it anyway.
If I read the post correctly this is a newly installed opt. throttle body, so it should not be dirty.
98.5 Black SVT with 34k miles Build #5683 Born on 4\15\1998
WR Headers GMK CAI
Blaupunkt system fiberglass tweeter pods
L.E.D. tail lights in the works
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Joined: Sep 2000
Posts: 4,693
Hard-core CEG'er
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Hard-core CEG'er
Joined: Sep 2000
Posts: 4,693 |
Originally posted by BlackE1:
Originally posted by Big Jim:
A dirty throttle body can cause the throttle plate to bind as you are describing. Pull the air intake tube away from the throttle body and take a look. If it's dirty, clean it. If you havn't cleaned it in the last 15,000 miles or so, clean it anyway.
If I read the post correctly this is a newly installed opt. throttle body, so it should not be dirty.
Your probably right. Somehow I thought he was talking about a new intake.
Now I'm beginning to think it may be a throttle cable problem. Not hooked up right or somehow not allowing the throttle to fully close. The IAC should be checked too, as others have posted.
Jim Johnson
98 SVT
03 Escape Limited
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