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

testing injector '94

Thread Tools
 
Search this Thread
 
Old Aug 31, 2015 | 04:38 PM
  #1  
ricasso's Avatar
ricasso
Thread Starter
Pro
 
Joined: Oct 2012
Posts: 672
Likes: 2
From: Cheltenham, England
Default testing injector '94

Well, I've changed all the wires and plugs on my 94, all the valves are working right so I'm guessing what seems like a misfire is down to an injector, I've put a stethoscope on them all and they all sound like their firing, but that dont mean there's fuel being injected, so what I'd like to know is can I take them out one at a time to see which one is bad (not injecting) or is there a better method?
Reply
Old Aug 31, 2015 | 11:09 PM
  #2  
Cliff Harris's Avatar
Cliff Harris
Race Director
15 Year Member
 
Joined: Apr 2002
Posts: 10,036
Likes: 346
From: Anaheim CA
Default

The usual method is to remove and raise the injector rails, keeping everything intact. Then pressurize the rails and look for leaking injectors.
Reply
Old Sep 1, 2015 | 12:51 PM
  #3  
jph46's Avatar
jph46
Racer
10 Year Member
Veteran: Air Force
Liked
Community Favorite
 
Joined: Sep 2011
Posts: 462
Likes: 30
From: Riverside California
Default

Just replaced mine on a 93 LT1. I checked the injectors with a OHM meter, 3 of the 8 where out of spec's. Went with the Bosch III from FIC, runs great and fires right up.
Reply
Old Sep 1, 2015 | 02:43 PM
  #4  
Mohammed_z's Avatar
Mohammed_z
Drifting
15 Year Member
Liked
 
Joined: Jan 2010
Posts: 1,624
Likes: 48
From: Saudi Arabia
Default

Originally Posted by jph46
Just replaced mine on a 93 LT1. I checked the injectors with a OHM meter, 3 of the 8 where out of spec's. Went with the Bosch III from FIC, runs great and fires right up.

Whats good injector reading for '94 ?
Reply
Old Sep 1, 2015 | 11:25 PM
  #5  
jph46's Avatar
jph46
Racer
10 Year Member
Veteran: Air Force
Liked
Community Favorite
 
Joined: Sep 2011
Posts: 462
Likes: 30
From: Riverside California
Default

Not sure if the 93/94 are the same! My good ones where all between 12.5-12.7 ohms. The bad where 10.6-11.1ohms. I believe what you want to see is a reading close to each other.
Reply
Old Sep 2, 2015 | 12:01 AM
  #6  
Cliff Harris's Avatar
Cliff Harris
Race Director
15 Year Member
 
Joined: Apr 2002
Posts: 10,036
Likes: 346
From: Anaheim CA
Default

The absolute reading isn't as important as that all the readings are within one ohm of each other. That removes any variables like the calibration of your meter and the resistance in the test probes. For example, these are the readings I got on my '86 with the older style injectors:

Code:
Cylinder #	 Cold	 	Hot
     1	 	17.1	 	18.3
     3	 	16.9	 	18.0
     5	 	16.9	 	17.9
     7	 	17.0	 	18.1
     2	 	16.8	 	18.0
     4	 	16.8	 	18.0
     6	 	16.8	 	18.0
     8	 	16.8	 	18.0
My recollection is that they changed to saturated style injectors in 1994, so those read lower by 3 or 4 ohms.
Reply

Get notified of new replies

To testing injector '94





All times are GMT -4. The time now is 03:26 PM.

story-0
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-1
2027 Corvette vs The World: Every Model vs Closest Competitor

Slideshow: 2027 Corvette lineup vs the world.

By Joe Kucinski | 2026-04-20 17:58:41


VIEW MORE
story-2
10 Most Common Corvette Problems of the Last 20 Years!

Slideshow: 10 major Corvette problems from the last 20 years.

By Joe Kucinski | 2026-04-14 16:37:05


VIEW MORE
story-3
5 MOST and 5 LEAST Popular Corvette Model Years in History!

Slideshow: 5 most and least popular Corvette model years.

By Joe Kucinski | 2026-04-08 13:25:01


VIEW MORE
story-4
2027 Corvette Buyer's Guide: Everything You Need to Know!

Slideshow: 2027 Corvette buyer's guide

By Joe Kucinski | 2026-04-17 16:41:08


VIEW MORE
story-5
10 Things C8 Corvette Owners Hate (But Won't Tell You)

Slideshow: 10 things C8 Corvette owners hate, but won't tell you.

By Joe Kucinski | 2026-04-01 18:36:07


VIEW MORE
story-6
10 Best Corvettes Coming to Barrett-Jackson Palm Beach 2026!

Slideshow: Should you add one of these incredible Corvettes to your garage?

By Brett Foote | 2026-04-01 18:14:05


VIEW MORE
story-7
Every Corvette Grand Sport Explained! (C2, C4, C6, C7, & C8)

Slideshow: Every Corvette Grand Sport explained

By Joe Kucinski | 2026-03-26 07:13:44


VIEW MORE
story-8
Grand Sport & Grand Sport X Launch Alongside All-New 535hp LS6 V8!

Slideshow: Breaking down the 2027 Grand Sport, Grand Sport X, Stingray, and LS6 V8.

By Michael S. Palmer | 2026-03-26 13:48:45


VIEW MORE
story-9
5 Reasons Bad Drivers Crash & 5 Ways to Avoid a Costly Mistake!

Slideshow: 5 reasons bad drivers crash sports cars & 5 ways to avoid a costly shame!

By Joe Kucinski | 2026-03-25 16:32:55


VIEW MORE