TPI Tuned Port Injection discussion and questions. LB9 and L98 tech, porting, tuning, and bolt-on aftermarket products.
Sponsored by:
Sponsored by:

anyway to fix a throttle body???

Thread Tools
 
Search this Thread
 
Old Aug 31, 2008 | 08:05 PM
  #1  
jayk2k3's Avatar
Thread Starter
Senior Member
iTrader: (2)
 
Joined: Aug 2004
Posts: 688
Likes: 0
From: va fairfax
Car: 85 camaro z28
Engine: 305
Transmission: auto to manaul
anyway to fix a throttle body???

i have a stock throttle body, it wont close all the way shut, so it idle high. the spring is very old, anything i do to fix this? dont realy have the cash 4 a new one right now
Reply
Old Aug 31, 2008 | 08:52 PM
  #2  
jv9999's Avatar
Senior Member
iTrader: (1)
 
Joined: Jul 2007
Posts: 1,141
Likes: 2
From: MA
Car: '87 IROC/'68 SS
Engine: 5.7L/350
Transmission: 700R4/Muncie 4-spd
Axle/Gears: 3.27 9 bolt / 3.31 12 bolt
Re: anyway to fix a throttle body???

Have you tried cleaning it? It's usually gum that makes them stick.
Reply
Old Aug 31, 2008 | 08:59 PM
  #3  
jayk2k3's Avatar
Thread Starter
Senior Member
iTrader: (2)
 
Joined: Aug 2004
Posts: 688
Likes: 0
From: va fairfax
Car: 85 camaro z28
Engine: 305
Transmission: auto to manaul
Re: anyway to fix a throttle body???

yup, ive clean the inside of the throttle body couple of time. the spring is weak. can u just buy the spring?
Reply
Old Aug 31, 2008 | 10:53 PM
  #4  
jv9999's Avatar
Senior Member
iTrader: (1)
 
Joined: Jul 2007
Posts: 1,141
Likes: 2
From: MA
Car: '87 IROC/'68 SS
Engine: 5.7L/350
Transmission: 700R4/Muncie 4-spd
Axle/Gears: 3.27 9 bolt / 3.31 12 bolt
Re: anyway to fix a throttle body???

Originally Posted by jayk2k3
yup, ive clean the inside of the throttle body couple of time. the spring is weak. can u just buy the spring?
You probably could have once, I don't know about now. Have you tried a little oil on the throttle shaft? As a temporary solution you jerry-rig a carb return spring to pull it back.
Reply
Old Sep 1, 2008 | 12:50 AM
  #5  
rgarcia63's Avatar
Supreme Member
 
Joined: Jan 2003
Posts: 2,133
Likes: 4
From: Houston, Texas
Car: 88' IROCZ
Engine: 388 TPI Motown 350 Race block
Transmission: 700R4
Axle/Gears: 2.77
Re: anyway to fix a throttle body???

Originally Posted by jayk2k3
yup, ive clean the inside of the throttle body couple of time. the spring is weak. can u just buy the spring?
The spring should be OK, unless it's been removed and not wound properly on installation.
You might try using a feeler gauge to measure the clearance of the idle screw, then back it out to allow the plates to completely close after loosening the plate screws. Now open & close the throttle a couple of times to allow the plates to reset to center, then while holding it closed tighten the plate screws. Set the idle screw back to where it was and see if it works any better.
Reply
Old Sep 2, 2008 | 07:20 PM
  #6  
pandin's Avatar
Senior Member
 
Joined: Sep 2007
Posts: 1,091
Likes: 1
From: West Central Ohio
Car: 86 vette
Engine: 383
Transmission: 700R4
Axle/Gears: 3.07
Re: anyway to fix a throttle body???

If the shaft/bores are worn enough it will cause a sticking problem.

Check for any up/down or side to side movement.
Reply
Old Sep 2, 2008 | 08:24 PM
  #7  
jayk2k3's Avatar
Thread Starter
Senior Member
iTrader: (2)
 
Joined: Aug 2004
Posts: 688
Likes: 0
From: va fairfax
Car: 85 camaro z28
Engine: 305
Transmission: auto to manaul
Re: anyway to fix a throttle body???

if i back down the idle screw, the plate stays in the same position, untill i push it back. i was goin to try to jerry-rig a carb return spring to pull it back, but i thought it would make the pedal to hard. i gave up. Decided to eat it, and upgrade to a 52mm throttle body. do throttle cable ever stick (binding up), like e-brake cable do???
Reply
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
Terrell351
Engine/Drivetrain/Suspension Parts for Sale
5
Jun 13, 2021 01:13 PM
Street Lethal
Power Adders
634
Apr 30, 2019 12:14 PM
Azrael91966669
DIY PROM
25
Jun 20, 2017 04:04 AM
mdtoren
TPI
12
Aug 23, 2015 12:52 PM
mdtoren
Tech / General Engine
0
Aug 16, 2015 05:45 PM




All times are GMT -5. The time now is 10:02 PM.