C3 Tech/Performance V8 Technical Info, Internal Engine, External Engine, Basic Tech and Maintenance for the C3 Corvette
Sponsored by:
Sponsored by:

No check engine light

Thread Tools
 
Search this Thread
 
Old Nov 5, 2014 | 12:02 PM
  #1  
Skyhigh82's Avatar
Skyhigh82
Thread Starter
Racer
15 Year Member
 
Joined: Nov 2002
Posts: 364
Likes: 0
From: Potomac MD
Default No check engine light

Car doesn't start, when to check codes and no check engine lite. Checked fuses all ok. Guess next thing is to pull the ECM and start probing.
Reply
Old Nov 5, 2014 | 12:53 PM
  #2  
AzMotorhead's Avatar
AzMotorhead
Limping across the line
Supporting Lifetime
20 Year Member
Liked
Loved
Community Favorite
 
Joined: Oct 2002
Posts: 5,299
Likes: 109
From: Peoria Az
Default

We can only ASSUME your car comes with one? No details about what you have. So everyones guess is as good.
ASSUMING your car is equipped with a CEL. Does it illuminate when you first turn the key?
if NO check the bulb.
Things that wont illuminate the CEL Fuel, Spark ,or air. everything needed to make engine run.

DOes engine turn over? Crank but no fire?
Or should we keep trying to be mind readers
Reply
Old Nov 5, 2014 | 01:50 PM
  #3  
MelWff's Avatar
MelWff
Race Director
20 Year Member
Liked
Loved
Community Favorite
 
Joined: May 2006
Posts: 18,735
Likes: 2,582
Default

do you have spark at the plugs? do you see evidence of fuel at the throttle bodies?
Reply
Old Nov 5, 2014 | 02:38 PM
  #4  
Easy Mike's Avatar
Easy Mike
Team Owner
Supporting Lifetime
20 Year Member
 
Joined: Jun 2000
Posts: 38,923
Likes: 1,482
From: Southbound
Cruise-In II Veteran
Default

Originally Posted by Skyhigh82
...Car doesn't start, when to check codes and no check engine lite...
Tell tale bulb might be burned out.

...Guess next thing is to pull the ECM and start probing...
Why not check for stored error codes in the computer before pulling things apart?

Reply
Old Nov 5, 2014 | 09:46 PM
  #5  
kcb37's Avatar
kcb37
Advanced
 
Joined: Mar 2014
Posts: 73
Likes: 0
Default

I would agree you are trying to get ahead of the horse when your tied to the back of the wagon.

Before you start tearing apart everything check for air/fuel/fire.
What are you missing?
Reply
Old Nov 5, 2014 | 11:05 PM
  #6  
crashdog172's Avatar
crashdog172
Instructor
Supporting Member
10 Year Member
All Eyes On Me
 
Joined: Feb 2012
Posts: 145
Likes: 2
From: hudson valley ny
Default

Check ecmb fuse if it has one
Reply
Old Nov 6, 2014 | 08:18 PM
  #7  
Duane4238's Avatar
Duane4238
Burning Brakes
15 Year Member
Liked
Loved
Community Favorite
 
Joined: Sep 2009
Posts: 1,124
Likes: 140
From: Western New York
Default

If it's cranking but no start, check that you're getting fuel. If yes, pull the dist. cap and take out the ignition module and go to your nearest Autozone (OR whatever) and have it tested. The ignition modules go with no warning and are an easy replace and fairly cheap. Good luck.
Duane
Reply
Old Nov 7, 2014 | 02:24 PM
  #8  
Skyhigh82's Avatar
Skyhigh82
Thread Starter
Racer
15 Year Member
 
Joined: Nov 2002
Posts: 364
Likes: 0
From: Potomac MD
Default

Thanks everyone, Duane, it was the ignition module. 82 running but still no check engine lite....guess i'll check bulb.
Reply
Corvette Stories

The Best of Corvette for Corvette Enthusiasts

story-0

10 Ugly Corvettes That We Still Kinda Love

 Joe Kucinski
story-1

Top 10 Most Expensive Corvettes Ever Sold on Bring A Trailer

 Brett Foote
story-2

10 Things Every Corvette Owner Needs (2026 Edition)

 Michael S. Palmer
story-3

8 Most "Only Corvette Owners Understand" Quirks and Problems

 Pouria Savadkouei
story-4

10 Reasons the C6 Z06 is Still A Performance Benchmark After 20 Years

 Joe Kucinski
story-5

How Much Horsepower Every Corvette Engine "LOST" in 1972

 Joe Kucinski
story-6

Top 10 DOs and DON'Ts for Protecting Your Convertible Top!

 Michael S. Palmer
story-7

Top 10 Most Explosive Corvettes Ever Made: Power-to-Weight Ratio Ranked!

 Joe Kucinski
story-8

150 hp to 1,250 hp: Every Corvette Generation Compared by the Specs That Matter

 Joe Kucinski
story-9

8 Coolest Corvette Pace Cars (and Replicas) of All Time

 Verdad Gallardo
Old Nov 7, 2014 | 07:22 PM
  #9  
Duane4238's Avatar
Duane4238
Burning Brakes
15 Year Member
Liked
Loved
Community Favorite
 
Joined: Sep 2009
Posts: 1,124
Likes: 140
From: Western New York
Default

Glad to hear you're back on the road. My '72 is put away until the spring. Forecast is for snow, tomorrow.
When you turn your key to the on position "before" starting, look and see if the check engine light is "on". It should be lit and then go off when the engine is started. GM's way of allowing you to check that the bulb is working. Good luck.
Duane
Reply
Old Nov 7, 2014 | 07:27 PM
  #10  
Amorget's Avatar
Amorget
Pro
15 Year Member
Active Streak: 30 Days
Liked
Loved
 
Joined: Oct 2008
Posts: 708
Likes: 28
Default

Also to note, a dead ICM normally won't cause the ECM to throw a code (at least in my experience).
Reply

Get notified of new replies

To No check engine light





All times are GMT -4. The time now is 08:22 PM.

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