?? regarding 1992 corvette

ss3011 · 08-11-2016, 10:43 PM

Just an idea . Can you install a fuel pressure gauge on the fuel rail and monitor the pressure when it has it's problem ?

Woodfin · 08-12-2016, 04:51 AM

Suggestions, look closely at the secondary wire between coil and distributor. Look at coil terminal for corrosion or carbon tracking.

Swap the ecu relay with the relay from another component that uses the same relay.

Another possibility is the primary connector at the ignition coil. It is a known issue for the primary connector to break internally. A replacement "pigtail" is available.

Bob Don · 08-12-2016, 07:49 AM

Check all your sensors. I had a mid '80s vette with a bad temperature sensor. It kept telling the computer the engine was cold and the computer would send too much fuel, causing similar symptoms as you described.

FED 387 · 08-12-2016, 08:08 AM

thanx for the answers we will check them out get back to all with our results--FED 387

Woodfin · 08-12-2016, 10:01 AM

another thought, use a fully capable scan tool that will show all live data, pending codes and history codes

cad · 08-12-2016, 10:04 AM

Quote:

Originally Posted by Bob Don

Check all your sensors. I had a mid '80s vette with a bad temperature sensor. It kept telling the computer the engine was cold and the computer would send too much fuel, causing similar symptoms as you described.

I second this. My father in law has replaced more temp sensors than he can remember. Cheap and affects how it idles/runs/mileage, etc.

Ed Wright · 08-12-2016, 01:58 PM

The high tension coil wire is a common problem with the LT1 cars. I used to keep one on the shelf when I had my shop open. Check the coolant temp on your scan tool. An open in the sensor, or connector indicates -40 deg. That should be black smoke on start up. Same as the choke shut tight on a carb.

merrill 2733 · 08-12-2016, 09:29 PM

You might want to check the fuel injectors, that era was bad about heat on them. Original injecters had issues, cold run & start perfect till you get underhood temp. To them, hope it helps.......good luck!!!!!!!

08-11-2016, 10:43 PM	#1
ss3011 Senior Member Join Date: Feb 2002 Location: Southeast Michigan Posts: 909 Likes: 70 Liked 239 Times in 114 Posts	Re: ?? regarding 1992 corvette Just an idea . Can you install a fuel pressure gauge on the fuel rail and monitor the pressure when it has it's problem ?

08-12-2016, 04:51 AM	#2
Woodfin Senior Member Join Date: Sep 2006 Location: Kilgore TX Posts: 540 Likes: 8 Liked 288 Times in 109 Posts	Re: ?? regarding 1992 corvette Suggestions, look closely at the secondary wire between coil and distributor. Look at coil terminal for corrosion or carbon tracking. Swap the ecu relay with the relay from another component that uses the same relay. Another possibility is the primary connector at the ignition coil. It is a known issue for the primary connector to break internally. A replacement "pigtail" is available.

08-12-2016, 07:49 AM	#3
Bob Don VIP Member Join Date: Oct 2002 Location: Greater Boston Posts: 1,496 Likes: 1,134 Liked 903 Times in 192 Posts	Re: ?? regarding 1992 corvette Check all your sensors. I had a mid '80s vette with a bad temperature sensor. It kept telling the computer the engine was cold and the computer would send too much fuel, causing similar symptoms as you described. __________________ Bob Don 128 SS

08-12-2016, 08:08 AM	#4
FED 387 VIP Member Join Date: Jun 2006 Posts: 3,422 Likes: 531 Liked 333 Times in 180 Posts	Re: ?? regarding 1992 corvette thanx for the answers we will check them out get back to all with our results--FED 387

08-12-2016, 10:01 AM	#5
Woodfin Senior Member Join Date: Sep 2006 Location: Kilgore TX Posts: 540 Likes: 8 Liked 288 Times in 109 Posts	Re: ?? regarding 1992 corvette another thought, use a fully capable scan tool that will show all live data, pending codes and history codes

08-12-2016, 01:58 PM	#7
Ed Wright Veteran Member Join Date: Mar 2005 Location: Sand Springs, OK Posts: 8,132 Likes: 896 Liked 390 Times in 170 Posts	Re: ?? regarding 1992 corvette The high tension coil wire is a common problem with the LT1 cars. I used to keep one on the shelf when I had my shop open. Check the coolant temp on your scan tool. An open in the sensor, or connector indicates -40 deg. That should be black smoke on start up. Same as the choke shut tight on a carb. __________________ Ed Wright 4156 SS/JA

08-12-2016, 09:29 PM	#8
merrill 2733 Junior Member Join Date: Dec 2010 Posts: 41 Likes: 0 Liked 7 Times in 6 Posts	Re: ?? regarding 1992 corvette You might want to check the fuel injectors, that era was bad about heat on them. Original injecters had issues, cold run & start perfect till you get underhood temp. To them, hope it helps.......good luck!!!!!!!