C4 General Discussion General C4 Corvette Discussion not covered in Tech

1989 question / help

Thread Tools
 
Search this Thread
 
Old Oct 17, 2013 | 01:24 PM
  #1  
7Cav's Avatar
7Cav
Thread Starter
Navigator
 
Joined: Oct 2013
Posts: 9
Likes: 0
Default 1989 question / help

My car has developed a rough idle 7>15, and " chugging " especially when we first start out . Also , it pops / back fires . It has died during idle too.
IF it is easy fix I'm good but otherwise it goes back to a mechanic.
THX
Reply
Old Oct 17, 2013 | 06:45 PM
  #2  
MrWillys's Avatar
MrWillys
Drifting
 
Joined: May 2013
Posts: 1,736
Likes: 31
From: Reno Nevada
Default

Fuel, air, and spark? hmm, ohm the injectors, and do a leak down down test (put fuel pressure gauge on rail, pressurize, and watch it leak down over 1 hour, more than 10 lb lose post up) on the fuel system.
Reply
Old Oct 17, 2013 | 06:55 PM
  #3  
vetteoz's Avatar
vetteoz
Safety Car
20 Year Member
 
Joined: Jan 2004
Posts: 3,556
Likes: 13
Default

Also
http://www.corvettephotographs.com/c4vettes/codes.htm
Reply
Old May 10, 2014 | 12:08 PM
  #4  
7Cav's Avatar
7Cav
Thread Starter
Navigator
 
Joined: Oct 2013
Posts: 9
Likes: 0
Default 89' Otcme

Originally Posted by 7Cav
My car has developed a rough idle 7>15, and " chugging " especially when we first start out . Also , it pops / back fires . It has died during idle too.
IF it is easy fix I'm good but otherwise it goes back to a mechanic.
THX
I told ya'll that I'd get back when the problem was solved. One
of the previous owners had set the car up as a street racer : ( holes
in the manifold ) for NO , 24# psi injectors ,cam and shaved heads and possibly
up graded pistons . She runs like a top but I can't drive her due a eye
eye operation the wk she was fixed. Oh, the injectors were replaced with 19# psi from a 302.
Once again TKS to all...see you on the road .
Reply

Get notified of new replies

To 1989 question / help





All times are GMT -4. The time now is 08:11 AM.

story-0
10 Ugly Corvettes That We Still Kinda Love

Slideshow: 10 ugly Corvettes that we still kinda love.

By Joe Kucinski | 2026-06-03 10:34:17


VIEW MORE
story-1
Top 10 Most Expensive Corvettes Ever Sold on Bring A Trailer

A lot of money has changed hands at the online auction house over the years.

By Brett Foote | 2026-06-03 10:21:50


VIEW MORE
story-2
10 Things Every Corvette Owner Needs (2026 Edition)

Slideshow: 10 great gifts Corvette enthusiasts actually want for Father's Day!

By Michael S. Palmer | 2026-06-03 15:43:40


VIEW MORE
story-3
8 Most "Only Corvette Owners Understand" Quirks and Problems

Slideshow: These are the quirks, annoyances, and oddly lovable problems that every Corvette owner eventually learns to live with.

By Pouria Savadkouei | 2026-05-28 09:31:39


VIEW MORE
story-4
10 Reasons the C6 Z06 is Still A Performance Benchmark After 20 Years

Slideshow: 10 reasons why the C6 Z06 is still a performance benchmark after 20 years.

By Joe Kucinski | 2026-05-27 17:20:09


VIEW MORE
story-5
How Much Horsepower Every Corvette Engine "LOST" in 1972

Slideshow: How much horsepower every Corvette engine lost in 1972.

By Joe Kucinski | 2026-05-27 16:54:53


VIEW MORE
story-6
Top 10 DOs and DON'Ts for Protecting Your Convertible Top!

Slideshow: How to Protect A Convertible Top: 10 DOs & DON'Ts

By Michael S. Palmer | 2026-04-03 00:00:00


VIEW MORE
story-7
Top 10 Most Explosive Corvettes Ever Made: Power-to-Weight Ratio Ranked!

Slideshow: The 10 most explosive Corvettes ever built based on power-to-weight ratio.

By Joe Kucinski | 2026-05-20 07:23:03


VIEW MORE
story-8
150 hp to 1,250 hp: Every Corvette Generation Compared by the Specs That Matter

Slideshow: From C1 to C8 we compare every Corvette generation by the numbers.

By Joe Kucinski | 2026-05-12 16:54:12


VIEW MORE
story-9
8 Coolest Corvette Pace Cars (and Replicas) of All Time

Slideshow: Some Corvette pace cars became collectible legends, while others perfectly captured the look and attitude of their era.

By Verdad Gallardo | 2026-05-11 09:50:51


VIEW MORE