1982 Collectors Edition Corvette
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3rd Gear
Joined: Dec 2017
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1982 Collectors Edition Corvette
My fuel pump relay is under the hood next to the map sensor is there also in the battery compartment my injectors are not spraying I have changed everything fuel pump,ecm,filter,fuel relay only getting 6 volts to fuel pump wire
Last edited by Johnny Lindsay; Dec 1, 2017 at 06:04 PM.
Racer
Joined: Nov 2017
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The relay next to your MAP sensor is your horn relay. Your fuel pump relay is in front of the battery next to the ECM and it's a royal pain to get it out The ECM supplies power to the fuel pump relay when you start cranking the engine. Once oil pressure exceeds 7 to 8 psi the oil pressure sender supplies the power to the relay. Take the plugin off the oil pressure sender and plug it back on a few times because it might have a bad connection. The fuel pump relay will begin failing at around 85,000 to 90,000 miles and you can repair it by dragging a folded strip of 600 grit wet-or-dry sandpaper through the points (they're very tiny). It's best to put the relay on the top of your battery so you can get to it easy and carry a spare with you at all times. When it's sitting on the top of your battery you can change it in 30 seconds. Also make sure you replace the 7 mm MAP hose with a piece of 1/4" fuel hose because the OEM MAP hose doesn't have any internal reinforcement and will split open where it connects to the throttle body....
Racer
Joined: Jul 2008
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From: Cypress (Houston) TX
I have the exact same problem and I've done the same repairs/replacements you did, except I'm getting 12V at my pump. My fuel pump relay is in the right side storage compartment area but I have not owned the car since conception so it could have been moved. Sure would appreciate you filling me in on how you resolved your problem if and when you do. Good luck and thank in advance for any insight you can provide. Hugh
Safety Car
Joined: Nov 2005
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From: Arizona - If you don’t know CFI, STOP proliferating the myths around it...
Do you have a GM Service Manual? If not, get one. If you do, take a look at the fuel/injector troubleshooting section, it's pretty good.
Thread Starter
3rd Gear
Joined: Dec 2017
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I have the exact same problem and I've done the same repairs/replacements you did, except I'm getting 12V at my pump. My fuel pump relay is in the right side storage compartment area but I have not owned the car since conception so it could have been moved. Sure would appreciate you filling me in on how you resolved your problem if and when you do. Good luck and thank in advance for any insight you can provide. Hugh
Thread Starter
3rd Gear
Joined: Dec 2017
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I think the black box behind the passenger seat is the anti theft control I have two of every thing ecm etc. change them all and every fuse in the car I have a manual read cover to cover I’ve got 4 people wanting to trade or buy my car it was running fine till I fixed the horns???
