Crossfire issues
Thread Starter
Heel & Toe
Joined: May 2024
Posts: 15
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Crossfire issues
My 1982 corvette with crossfire injection cut out on me the other day on the road, had it towed home and this morning ran for about 2 blocks then cut out again. The fuel pump is working and the injectors are firing, but it doesnt fire up, just cranks. Any ideas?
Race Director
Joined: May 2006
Posts: 18,734
Likes: 2,582
Did you pull a spark plug boot, insert a screw driver in the boot, hold the metal part of screw driver near metal and have someone try to start to check for spark?
If you have a timing light you can use that to test.
If you have a timing light you can use that to test.
Drifting
Joined: Dec 2016
Posts: 1,387
Likes: 220
definitely sounds ignition related if youre getting fuel. ICM (little plug thing in the distributor) seems to be a common issue. That or the ignition coil, maybe? You can also unplug the anti-theft and see if it works.
Safety Car
Joined: Nov 2005
Posts: 3,532
Likes: 1,185
From: Arizona - If you don’t know CFI, STOP proliferating the myths around it...
My 1982 corvette with crossfire injection cut out on me the other day on the road, had it towed home and this morning ran for about 2 blocks then cut out again. The fuel pump is working and the injectors are firing, but it doesnt fire up, just cranks. Any ideas?
Drifting
Joined: Aug 2019
Posts: 1,510
Likes: 498
Check spark at the plug wire , the injectors firing indicates the module is working good enough to it least fire the injectors during crank mode, sometimes those distributor rotors burn through the center and the spark goes to the distributor shaft instead of the plug wire , if no spark at the wire then remove distributor rotor and inspecting the back side of the rotor for a big black burn spot
Drifting
Joined: Oct 2024
Posts: 1,656
Likes: 383
From: Toronto, Ontario
The first thing you absolutely need for any CFI car is the 82 GM service manual that you can find usually on eBay. It has everything you need to find, fix and maintain your CFI system. Follow the troubleshooting charts and you will find the issue and it does sound like an ignition issue. GL
Melting Slicks
Joined: May 2021
Posts: 2,271
Likes: 1,316
From: Fleming Island, FL
Check spark at the plug wire , the injectors firing indicates the module is working good enough to it least fire the injectors during crank mode, sometimes those distributor rotors burn through the center and the spark goes to the distributor shaft instead of the plug wire , if no spark at the wire then remove distributor rotor and inspecting the back side of the rotor for a big black burn spot
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Thread Starter
Heel & Toe
Joined: May 2024
Posts: 15
Likes: 0
Thread Starter
Heel & Toe
Joined: May 2024
Posts: 15
Likes: 0
would this be something that causes to car to spontaneously stop working
Thread Starter
Heel & Toe
Joined: May 2024
Posts: 15
Likes: 0
The first thing you absolutely need for any CFI car is the 82 GM service manual that you can find usually on eBay. It has everything you need to find, fix and maintain your CFI system. Follow the troubleshooting charts and you will find the issue and it does sound like an ignition issue. GL
Thread Starter
Heel & Toe
Joined: May 2024
Posts: 15
Likes: 0
i went to autozone and picked up a new ignition coil, then cleaned the distributor contacts with electronic cleaner and a dremel. The car started with a misfire so i shut it off and traced my plug wires to their correct positions and now it wont start again
Safety Car
Joined: May 2001
Posts: 4,757
Likes: 1,647
From: Fairfax Virginia
Listen to Tom, he is a resident expert on the subject of Crossfires. Follow the advice and get the GM Factory Service Manual (only) and start troubleshooting as the FSM's have the very best information for this type of issue.
I have seen plenty of Ignition Coils that worked fine one day and died the next. Either parked or being used. Then start on the distributor, coil, wires and plugs. Do what was suggested above and use that FSM to tell which way to go. If you start throwing parts it could/will get very expensive.
Listen to Tom!
RockAuto sells the FSM's and other manuals on DVD for a lot less than the hardcovers. Those are also available but are costly. Personally I could not maintain my 1988 C4 and it's L98 without that FSM, it is 2 big manuals that cover Mechanical and Electrical system with incredible troubleshooting.
I have seen plenty of Ignition Coils that worked fine one day and died the next. Either parked or being used. Then start on the distributor, coil, wires and plugs. Do what was suggested above and use that FSM to tell which way to go. If you start throwing parts it could/will get very expensive.
Listen to Tom!
RockAuto sells the FSM's and other manuals on DVD for a lot less than the hardcovers. Those are also available but are costly. Personally I could not maintain my 1988 C4 and it's L98 without that FSM, it is 2 big manuals that cover Mechanical and Electrical system with incredible troubleshooting.
Drifting
Joined: Dec 2016
Posts: 1,387
Likes: 220
When it started and had a misfire, did it sound like it was missing on a single cylinder or just randomly misfiring? if random misfires, you could check your timing...