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

1989 Corvette Problem

Thread Tools
 
Search this Thread
 
Old Apr 29, 2012 | 08:02 PM
  #1  
Red89'-L98's Avatar
Red89'-L98
Thread Starter
Burning Brakes
10 Year Member
Conversation Starter
All Eyes On Me
 
Joined: Mar 2012
Posts: 768
Likes: 22
From: California
FL Events Coordinator
St. Jude Donor'13
Default 1989 Corvette Problem

The car when it is idling is missing. To try and fix this what is recommended I was thinking just changing the spark plugs to see if that is it because I know spark plugs can cause that.

Also when I get to about 50-60 MPH the car starts to strain like it is not shifting I did not go any higher to see if it would shift or not because I did not want to mess it up, Anyone have any suggestions for that?

Also on the spark plugs what is the BEST spark plug to buy for a 1989 corvette and I want to buy the best ones possible.

Another question my oil temp while I was driving it only said low but I drove it for about 5 miles hoping it would have a temp show up. Would it show up in that amount of time or would I need to drive it more? Because knowing the oil temp is important as I do not want to kill the car.

Thanks.

Last edited by Red89'-L98; Apr 29, 2012 at 08:28 PM.
Reply
Old Apr 29, 2012 | 10:05 PM
  #2  
65Z01's Avatar
65Z01
Team Owner
20 Year Member
 
Joined: Dec 2000
Posts: 90,675
Likes: 304
From: SE NY
Cruise-In II Veteran
Default

You could clip a timing light successively onto each plug wire near the spark plug to see if the miss coincides with a missed timing flash.

The oil temp sender is under the car near the oil filter. See if the cable is attached, if so clip a DMM onto the sensor and let the engine warm up to see if resistance changes with engine temp.
Reply
Old Apr 29, 2012 | 11:20 PM
  #3  
1986coupe's Avatar
1986coupe
Burning Brakes
15 Year Member
 
Joined: Jun 2003
Posts: 1,079
Likes: 1
From: Niagara Falls ON
Default

Check the plug connections at the distributor and at the plugs.

If the car doesn't feel like it is shifting properly then have someone familiar with transmissions check it out. How is the fluid level in the transmission?
Reply
Old Apr 29, 2012 | 11:42 PM
  #4  
msslp04's Avatar
msslp04
Safety Car
Supporting Lifetime
20 Year Member
Conversation Starter
All Eyes On Me
 
Joined: May 2005
Posts: 3,682
Likes: 1
From: Scappoose Oregon
St. Jude Donor '11,'14
Default

Originally Posted by 1986coupe
Check the plug connections at the distributor and at the plugs.

If the car doesn't feel like it is shifting properly then have someone familiar with transmissions check it out. How is the fluid level in the transmission?


Smell the transmission fluid also to see if it smells burnt. My 89 had the transmission go out a few years ago and only had 30,000 miles on it. From what I researched on this forum it is common for the transmission to go bad. I had it rebuilt with better than stock parts to avoid this happening again.

Here's the link to my transmission post:
http://forums.corvetteforum.com/c4-g...n-problem.html

Last edited by msslp04; Apr 29, 2012 at 11:46 PM. Reason: added link
Reply
Old Apr 30, 2012 | 12:15 AM
  #5  
Cliff Harris's Avatar
Cliff Harris
Race Director
15 Year Member
 
Joined: Apr 2002
Posts: 10,036
Likes: 346
From: Anaheim CA
Default

How long have you had this car?

There is no "best" spark plug -- only opinions... ;-)

It sounds like you have crossed spark plug wires. Check against this diagram:

Reply
Old Oct 12, 2020 | 09:33 AM
  #6  
John A Iaroli's Avatar
John A Iaroli
1st Gear
 
Joined: Oct 2020
Posts: 1
Likes: 0
Default

I turned off the head lights and the parking lights do not go off,I unplug the light switch and they are still on I disconnected to turn them is there a relay doing this and were is it, thanks John
Reply
Old Oct 13, 2020 | 04:17 AM
  #7  
stew86MCSS396's Avatar
stew86MCSS396
Pro
All Eyes On Me
Photogenic
 
Joined: Aug 2020
Posts: 647
Likes: 126
From: Liliha Bakery stuffing my face with coco puffs!
Default

Spark plug wires? Bad injectors?
Reply

Get notified of new replies

To 1989 Corvette Problem





All times are GMT -4. The time now is 11:26 AM.

story-0
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-1
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-2
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
story-3
Top 10 Corvette Engines RANKED by Peak Torque (70+ Years of Muscle!)

Slideshow: Ranking the top 10 Corvette engines by torque output.

By Joe Kucinski | 2026-05-05 11:58:09


VIEW MORE
story-4
Corvette ZR1X Will Be Pacing the Indy 500, And Could Probably Race, Too!

Slideshow: A Corvette pace car nearly matching IndyCar speeds sounds exaggerated, until you look at the numbers.

By Verdad Gallardo | 2026-05-04 20:03:36


VIEW MORE
story-5
Top 10 Corvettes Coming to Mecum Indy 2026!

Among a rather large group of them.

By Brett Foote | 2026-05-04 13:56:44


VIEW MORE
story-6
Top 10 C9 Corvette MUST-HAVES to Fix These C8 Generation Flaws!

Slideshow: the top 10 things Corvette owners want in the C9 Corvette

By Michael S. Palmer | 2026-04-30 12:41:15


VIEW MORE
story-7
10 Revolutionary 'Corvette Firsts' Most People Don't Know

Slideshow: 10 Important Corvette 'firsts' that every fan should know.

By Joe Kucinski | 2026-04-29 17:02:16


VIEW MORE
story-8
5 Reasons to Upgrade to an LS6-Powered Corvette; 5 Reasons to Stay LT2

Slideshow: Should you buy a 2020-2026 Corvette or wait for 2027?

By Michael S. Palmer | 2026-04-22 10:08:58


VIEW MORE
story-9
2027 Corvette vs The World: Every C8 vs Its Closest Competitor

Slideshow: 2027 Corvette lineup vs the world.

By Joe Kucinski | 2026-04-24 16:12:42


VIEW MORE