82' crossfire injector
Thread Starter
Instructor
Joined: Mar 2018
Posts: 159
Likes: 18
From: FL
82' crossfire injector
Hi all,
I was just starting up my car for short drive and for the first 3 min the car was running fine. Then I notice the car sound funny, check engine came on and only work on idle rpm.
After checking the car I notice that only 1 injector our of the 2 is working (driver side). I tested the voltage and the injector is receiving power , I also checked that the fuel is going through.
I am about to order new Injector, but I was wondering if it could be just a vacuum line?
I was just starting up my car for short drive and for the first 3 min the car was running fine. Then I notice the car sound funny, check engine came on and only work on idle rpm.
After checking the car I notice that only 1 injector our of the 2 is working (driver side). I tested the voltage and the injector is receiving power , I also checked that the fuel is going through.
I am about to order new Injector, but I was wondering if it could be just a vacuum line?
Melting Slicks
Joined: May 2021
Posts: 2,263
Likes: 1,308
From: Fleming Island, FL
A injector that doesn't spray is checked with a noid light to check the integrity of the electrical side. Assuming you correctly checked for trouble codes, you're ECM is bad. After 20 seconds of the CEL being illuminated, you most definitely should have stored codes.
Edit: you also should check the fuel pressure. The pressure could be low and one injector could be on tipping point of not spraying.
Edit: you also should check the fuel pressure. The pressure could be low and one injector could be on tipping point of not spraying.
Last edited by Fly skids up!; Dec 27, 2022 at 05:54 PM.
Thread Starter
Instructor
Joined: Mar 2018
Posts: 159
Likes: 18
From: FL
A injector that doesn't spray is checked with a noid light to check the integrity of the electrical side. Assuming you correctly checked for trouble codes, you're ECM is bad. After 20 seconds of the CEL being illuminated, you most definitely should have stored codes.
Edit: you also should check the fuel pressure. The pressure could be low and one injector could be on tipping point of not spraying.
Edit: you also should check the fuel pressure. The pressure could be low and one injector could be on tipping point of not spraying.
I will also try 9v battery direct to the injector to verified if its actual work.
Last edited by Idan55; Dec 27, 2022 at 07:35 PM.
Melting Slicks
Joined: May 2021
Posts: 2,263
Likes: 1,308
From: Fleming Island, FL
I'm only pointing this out because in another thread the OP said he had power at the injector, I chime in without mentioning the injector fuses, someone else chime in to check the fuses and turns out to be a bad fuse all along and I look like a jerk.
A noid light should be in every 82 Corvette owners tool box.
Last edited by Fly skids up!; Dec 28, 2022 at 03:42 AM.
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Melting Slicks
Joined: May 2021
Posts: 2,263
Likes: 1,308
From: Fleming Island, FL
Burning Brakes
Joined: Feb 2020
Posts: 904
Likes: 569
From: Central NJ
I got to ask, what does Home Depot have for testing a injectors? A couple of 2x4's?
60
Last edited by 1860army; Dec 29, 2022 at 12:10 AM.
Drifting
Joined: Aug 2019
Posts: 1,508
Likes: 495
Do an ohms test on both injectors and then switch the injector side to side and see if it follows the injector or the no fuel spray stays on original side .
Both injectors have the same power wire but it’s the computer that controls the Ground to make it all work
Both injectors have the same power wire but it’s the computer that controls the Ground to make it all work
Burning Brakes
Joined: Feb 2020
Posts: 904
Likes: 569
From: Central NJ
I've should have taken a BFH to a few Holley's!
60
Drifting
Joined: Aug 2019
Posts: 1,508
Likes: 495
Ahhh , I see they are different good call, that's fugged up and screws up switching side to side for testing so back to a NOID light and ohm meter for diagnosing
Thread Starter
Instructor
Joined: Mar 2018
Posts: 159
Likes: 18
From: FL
Ok, I tested few things today:
ECM and 2 injector fuses are fine. I also replaced them just to be sure.
I did noid light test to each injector, front injector noid light doesn't work.
9V powered each injector both are working fine.
I start to believe that it could be the ECM again. I only had it 1 year not even
Can anyone recommend a scanner please?
ECM and 2 injector fuses are fine. I also replaced them just to be sure.
I did noid light test to each injector, front injector noid light doesn't work.
9V powered each injector both are working fine.
I start to believe that it could be the ECM again. I only had it 1 year not even
Can anyone recommend a scanner please?
Melting Slicks
Joined: May 2021
Posts: 2,263
Likes: 1,308
From: Fleming Island, FL
Good to know that you can check TBI injectors with a 9V battery. I wouldn't bother looking for another CFI ECM. I did this:
https://www.corvetteforum.com/forums...m-odyssey.html
There's a guy on this forum Buccaneer that can hook you up with a plug n play solution too. Either way you'll be light years ahead with any newer ECM.
https://www.corvetteforum.com/forums...m-odyssey.html
There's a guy on this forum Buccaneer that can hook you up with a plug n play solution too. Either way you'll be light years ahead with any newer ECM.