C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

1992 fast idle

Thread Tools
 
Search this Thread
 
Old 09-01-2018, 07:14 PM
  #1  
petes32
4th Gear
Thread Starter
 
petes32's Avatar
 
Member Since: Sep 2018
Posts: 4
Likes: 0
Received 0 Likes on 0 Posts
Default 1992 fast idle

can you gentlemen help me have a fast idle speed
Old 09-01-2018, 09:11 PM
  #2  
aklim
Team Owner
 
aklim's Avatar
 
Member Since: Jul 2004
Location: Hartford WI
Posts: 24,285
Received 2,230 Likes on 1,942 Posts

Default

I'd get a scanner to see what is going on. You could have an air leak or a bad CTS or something else.
Old 09-02-2018, 06:06 AM
  #3  
FASTAZU
Race Director

 
FASTAZU's Avatar
 
Member Since: Feb 2002
Location: Compound in the Grove, Ga.
Posts: 11,329
Received 910 Likes on 583 Posts
2020 C3 of the Year Finalist - Unmodified
2019 C4 of Year Finalist (performance mods)
2018 C4 of Year Finalist
2015 C4 of the Year Finalist
St. Jude Donor '16
2020 C3 of the Year Finalist - Unmodified

Default

Sounds like a vacuum leak or maybe bad IAC. Your picture looks odd I see the LT1 is not in a Corvette?

Last edited by FASTAZU; 09-02-2018 at 06:09 AM.
Old 09-02-2018, 09:37 PM
  #4  
belairbrian
Melting Slicks
 
belairbrian's Avatar
 
Member Since: Oct 2016
Location: Central Alabama
Posts: 2,023
Received 358 Likes on 290 Posts
Default

Do you have the 92 ECM and the ALDL connector? If so an adapter and a laptop with TunerPro RT will tell you what you need to know.

The most likely causes are, as already mentioned, a vacuum leak, a bad IACV, air bypassing the throttle plates fro someone cleaning the DAG off them. Other possibilities are MAP sensor or O2 sensor.

You need to read the ECM to find the problem.

Is this installed in a 32 Ford?

Get notified of new replies

To 1992 fast idle




Quick Reply: 1992 fast idle



All times are GMT -4. The time now is 03:15 AM.