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1982 cross fire problems

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Old Jun 2, 2025 | 06:01 PM
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Default 1982 cross fire problems

I have 21k mile survivor that has crossfire injection issues would like to find a establishment that could remedy the problem and a plus world be if that’s could address some minor issues like hatch won’t open etc…..

anyone have a recommendation in the southeast would help.

thx in advance for your help
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Old Jun 2, 2025 | 10:26 PM
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Are you willing to tackle the problems yourself? Tremendous amount of help and info here on the forum.
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Old Jun 3, 2025 | 11:28 AM
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Originally Posted by tcbharley
I have 21k mile survivor that has crossfire injection issues would like to find a establishment that could remedy the problem and a plus world be if that’s could address some minor issues like hatch won’t open etc…..

anyone have a recommendation in the southeast would help.

thx in advance for your help
What issues are you having besides the hatch? Lots of things can be fixed by purchasing the 82 corvette GM service manual.
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Old Jun 6, 2025 | 04:24 PM
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I do not want to work on it myself - main issue is the crossfire injection
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Old Jun 6, 2025 | 05:27 PM
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Originally Posted by tcbharley
I do not want to work on it myself - main issue is the crossfire injection
Then you bought the wrong model C3. Finding a shop to work on a Crossfire will be difficult if not next to impossible. Order a GM service manual and start learning.
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Old Jun 6, 2025 | 05:55 PM
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God helps those who help themselves 🙏
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Old Jun 7, 2025 | 09:18 AM
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What Exactly is a "Cross Fire Injection"? Half carb/fuel injection? Why would you not do away with it for a modern alternative

Only a #'s matching maniac has Any interest in a #'s matching mechanical set up for performance. So it is solely a factory example.
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Old Jun 7, 2025 | 12:12 PM
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Originally Posted by tcbharley
I have 21k mile survivor that has crossfire injection issues would like to find a establishment that could remedy the problem and a plus world be if that’s could address some minor issues like hatch won’t open etc…..

anyone have a recommendation in the southeast would help.

thx in advance for your help
I'm in Mobile. There were 2 Corvette specialty shops down here but both are long gone unfortunately. There's Leo's Corvette in Pensacola but from what I've read they are slammed all the time but you should check anyway. I almost purchased an 82 Collector Edition that has Cross Fire and I knew going in that I would need to learn how to work on it. Finding someone who knows how to repair/tweak/tune Cross Fire is difficult and will only be harder over time. However, if originality is less important than enjoying your cool car, I'm sure you can find mechanics who could convert your engine to a more common manifold and carburetor setup. Otherwise as mentioned you're gonna have to work on it yourself. If you do find someone in Alabama I'm all ears down here. Good luck

By the way if your's has a hatch then it is a Collector Edition as they were the only C3's with a hatch. Or is your's a C4
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Old Jun 8, 2025 | 01:05 AM
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honestly, the crossfire system has been relatively easy to work on.

If you are up for it, let us know. buc has been a huge help and ive learned a lot from the forums. theres maybe a half dozen sensors that affect how the ECU runs the engine. other than that, its the same thing as a carb'd car with the slight added complications of the ECU potentially failing.

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Old Jun 8, 2025 | 06:27 PM
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Unfortunately, there are a number of people on here that do not know anything about CFI and then give the wrong input. There is NOTHING special about CFI, it has two, single injector Rochester TBI units on it, that's it. From the intake down down it is a basic GM 350, again nothing special. It has a Gen II OBD1 ECM, once more nothing special. You should be able to fix or figure out what's going on with the motor with the GM service manual. Is it perfect, No! BUT it is a huge help in understanding how the system works. Once you get how it works and set it up the way it should be, it is a very nice system IMO that's like the Energizer bunny, it keeps going and going. It is reliable if you don't mess with it not knowing what you are doing.

There are a couple of things that these motors are rather sensitive to, fuel pressure and balance which gives these cars a bad name. Get those two right and you are on your way to a nice running motor. Yes, we can talk about all the other things that come into play like the IACs, TPS, CTS etc... But those are no different than any other car sensor on newer models and when they go bad, you replace them. The really bad thing about these cars and the ANY other CFI car is the ECM. The ECMs are 43 years old right now on the 82. Electronics don't last forever and the the ECMs are almost extinct, when they go bad, you could be in trouble. Without a good ECM, the car is a paper weight. There are/were ECMs available that took care of that issue not long ago, but they have dried up since Sept of last year. I'm taking a trip to PA in a couple weeks in hopes of taking care of that issue and we shall see if I can make ECMs once again available for CFI and everybody will be happy again.

Other than that, I would highly suggest you purchase the GM 82 corvette service manual and read it. If you don't want to do that, get your wallet out and find some shop that is willing to work on it and MAY NOT have a clue what to do with the car and charge you a fortune. Lastly, if all else fails, you can sell the car. Sounds harsh, but it is reality. Most people here that know CFI only try to help others that are in need. I wish you good luck with your 82 or quest for a good shop.
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Old Jun 8, 2025 | 07:52 PM
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Originally Posted by Buccaneer
Lastly, if all else fails, you can sell the car.
Or just convert it to a carburetor.
The truth is the OP doesn't want to get dirt under his fingers nails and wants someone else to do the heavy lifting. I looked at some of the OP's other threads and it's mostly made up of buying and selling of cars. So make of it what you think. And remember, you can bring the horse to the water, you know the rest.
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Old Jun 8, 2025 | 10:12 PM
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Originally Posted by Buccaneer
Unfortunately, there are a number of people on here that do not know anything about CFI and then give the wrong input. There is NOTHING special about CFI, it has two, single injector Rochester TBI units on it, that's it. From the intake down down it is a basic GM 350, again nothing special. It has a Gen II OBD1 ECM, once more nothing special. You should be able to fix or figure out what's going on with the motor with the GM service manual. Is it perfect, No! BUT it is a huge help in understanding how the system works. Once you get how it works and set it up the way it should be, it is a very nice system IMO that's like the Energizer bunny, it keeps going and going. It is reliable if you don't mess with it not knowing what you are doing.

There are a couple of things that these motors are rather sensitive to, fuel pressure and balance which gives these cars a bad name. Get those two right and you are on your way to a nice running motor. Yes, we can talk about all the other things that come into play like the IACs, TPS, CTS etc... But those are no different than any other car sensor on newer models and when they go bad, you replace them. The really bad thing about these cars and the ANY other CFI car is the ECM. The ECMs are 43 years old right now on the 82. Electronics don't last forever and the the ECMs are almost extinct, when they go bad, you could be in trouble. Without a good ECM, the car is a paper weight. There are/were ECMs available that took care of that issue not long ago, but they have dried up since Sept of last year. I'm taking a trip to PA in a couple weeks in hopes of taking care of that issue and we shall see if I can make ECMs once again available for CFI and everybody will be happy again.

Other than that, I would highly suggest you purchase the GM 82 corvette service manual and read it. If you don't want to do that, get your wallet out and find some shop that is willing to work on it and MAY NOT have a clue what to do with the car and charge you a fortune. Lastly, if all else fails, you can sell the car. Sounds harsh, but it is reality. Most people here that know CFI only try to help others that are in need. I wish you good luck with your 82 or quest for a good shop.

Price allowing, put me on the list of an available backup ECM. Honestly, Im not trying to make this car fast since I have an LY6/Boosted GS in the works. i love how EASY it is to start, how well it generally runs, and how little I have to mess with carb tuning. I want to keep this car on the TBI as long as I can.
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Old Jun 9, 2025 | 01:13 PM
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Originally Posted by Ahrmike
Price allowing, put me on the list of an available backup ECM. Honestly, Im not trying to make this car fast since I have an LY6/Boosted GS in the works. i love how EASY it is to start, how well it generally runs, and how little I have to mess with carb tuning. I want to keep this car on the TBI as long as I can.
Thanks, but I can not do that. You MUST do it yourself online. GL
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Old Jun 9, 2025 | 06:52 PM
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wow.....so angry. just asked a question......what i want to do or not do is none of your business. maybe i have so many cars i dont have the time. work on your beater and STFU
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Old Jun 9, 2025 | 07:01 PM
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Originally Posted by tcbharley
wow.....so angry. just asked a question......what i want to do or not do is none of your business. maybe i have so many cars i dont have the time. work on your beater and STFU
At least my car runs and STFU to you too.
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Old Jun 9, 2025 | 08:35 PM
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nissan sentras are very reliable - congrats. what a *****.
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Old Jun 9, 2025 | 08:59 PM
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I think the Toyota Camry is a better car
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Old Jun 10, 2025 | 03:59 AM
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Originally Posted by Buccaneer
Thanks, but I can not do that. You MUST do it yourself online. GL

Buc, I was referring to you looking into making the ECMs available - are you planning on just picking up a bunch or spares, or are you looking at getting replacements built?

If there's enough interest, I suppose we could probably get a standalone ECU + a premade harness and some basic tune + self tuning system to run the TBIs...

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Old Jun 10, 2025 | 10:42 AM
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Originally Posted by Ahrmike
Buc, I was referring to you looking into making the ECMs available - are you planning on just picking up a bunch or spares, or are you looking at getting replacements built?

If there's enough interest, I suppose we could probably get a standalone ECU + a premade harness and some basic tune + self tuning system to run the TBIs...
Just to be clear, I'm planning on purchasing the Dynamic EFI business in whole which would include the EBL and other things. I can not put you on any list myself unfortunately. I hope this helps and I will be there in two weeks for a site survey with all parties involved at this time to include former dealers.
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Old Jun 10, 2025 | 08:09 PM
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Originally Posted by Way
What Exactly is a "Cross Fire Injection"? Half carb/fuel injection? Why would you not do away with it for a modern alternative

Only a #'s matching maniac has Any interest in a #'s matching mechanical set up for performance. So it is solely a factory example.
No that is not what crossfire injection is. It is 2 throttle bodies on a cross ram manifold.
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