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'82 crossfire electric fuel pump problem
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Joined: Apr 2008
Posts: 92
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From: Carol Stream Illinois
'82 crossfire electric fuel pump problem
Just converted my '82 crossfire to carbureted using new edelbrock heads, intake, cam, distributor and carburetor. Everything with the swap went fine and I'm ready to fire it up. The problem I'm having, is I'm not getting power to my stock electric fuel pump. I've purchased a wiring schematic from Lectric, Inc., but I can't make heads or tails of it. Can anyone help? I know for certain that the fuel pump relay goes thru the ecm, but can't figure it out! I even went to the extent of plugging all of the old wire harnesses back to the firewall, but that didn't work either. Any advice from someone who has done this before would be greatly appriciated.
Melting Slicks
Joined: Jul 2005
Posts: 2,740
Likes: 3
From: Aurora Ontario
Just a guess. Did you leave the oil pressure sensor in place. Thats the bell shaped thing to the driver side of the distributor and down a little lower. Fuel pump will shut off if its not working.
I believe the only thing you should have disconnected is the harness that goes to the injectors,iac's and tps.
There is a test. Can remember off hand. It has to do with running battery power to the pin for the fuel pump on the connector under the ashtray.I can't remember which pin. I'll have to look it up tomorrow.
There is also a fuel pump relay in the storage compartment behind the passenger seat. Have you touched that?
Jim
I believe the only thing you should have disconnected is the harness that goes to the injectors,iac's and tps.
There is a test. Can remember off hand. It has to do with running battery power to the pin for the fuel pump on the connector under the ashtray.I can't remember which pin. I'll have to look it up tomorrow.
There is also a fuel pump relay in the storage compartment behind the passenger seat. Have you touched that?
Jim
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Joined: Apr 2008
Posts: 92
Likes: 1
From: Carol Stream Illinois
I haven't touched the relay behind the seat or the oil pressure safety switch. I obviously had all the oil drained from the engine for about a month while I made the swap, but since that I've filled it with oil again, but it hasn't been started since. As far as the fuel pump relay, do you have a wiring diagram? Any info you have with that test would be great. Thanks!!!
Melting Slicks
Joined: Jul 2005
Posts: 2,740
Likes: 3
From: Aurora Ontario
I haven't touched the relay behind the seat or the oil pressure safety switch. I obviously had all the oil drained from the engine for about a month while I made the swap, but since that I've filled it with oil again, but it hasn't been started since. As far as the fuel pump relay, do you have a wiring diagram? Any info you have with that test would be great. Thanks!!!
CKT 120 is the tan/white wire that runs from the relay to the fuel pump fuse and also branches off to the oil pressure switch.
I'm still looking for CKT150. Just an after thought...not sure its the cause but did you connect the ground on the passenger side valve cover? It comes off those wires that went to the EGR solenoid?there should be the following wires on the relay. Orange goes to battery. Red goes to diagnostic check on terminal under ashtray. Green/white goes to fuel pump relay drive on ECM. Black goes to ground. Tan/white goes to oil pressure switch.
Will it even kick over when you turn the key? You never said. Can you let me know? if it doesn't kick over the problem could be something else. i.e the alarm.
Jim
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Thread Starter
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Joined: Apr 2008
Posts: 92
Likes: 1
From: Carol Stream Illinois
Thanks for all your help! I found the oil pressure switch "open". Will replace it and go from there. By the way, where are those schematics from? Way better than anything I was able to find!!! Thanks again, Steve.
Melting Slicks
Joined: Jul 2005
Posts: 2,740
Likes: 3
From: Aurora Ontario
They are out of the 1982 Corvette Shop Manual. I scanned them and posted.
If you need any more diagrams shoot me a message.
Jim
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Joined: Mar 2008
Posts: 716
Likes: 1
From: Albuquerque New Mexico
Nothin worse than a nagging elec. issue when you're ready to fire her up for the 1st time. Let us know how it all turns out. I'm looking at swapping my Crossfire with a setup similar to what you described. Can't wait. Enjoy!
