 Red71Shark
Moderator & "3rd Year" Silver Supporting Member
Posts: 2464
Age: 72
Loc: Perpetually lost...
Reg: 06-01-99
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08-30-24 02:49 PM - Post#2873271
I have a 1996 Corvette. A couple of days ago my fuel pump took a dump. Also took the small 10A fuse with it. I've replaced the pump and fuse and the car started right up. I put the car in the garage overnight and went to start it today and no fuel pressure. I disconnected the connector that supplies voltage to the pump. As it should, it has 12v for 2 seconds when the key is turned on. I then took a 9v battery and connected it to the pump side of the connector and the pump ran. The male terminals of the voltage side of the connector look greenish - sort of like weathered copper. I've ordered a connector cleaning kit that should be here tomorrow. My question is this; am I correct to think that my problem is with the connection between the male and female sides of the connector? Thanks!!
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 Magnetocheck
"2nd Year" Silver Supporting Member
Posts: 505
Age: 69
Loc: Charlotte, NC, USA
Reg: 09-05-22
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08-31-24 05:36 AM - Post#2873276
In response to Red71Shark
Did it blow the fuse again? That generally requires a short to ground or some other high-amp draw. in this case probably in the pump itself. If it blew a second time, you need to do some digging. Corrosion on the connectors should be cleaned up but by itself won’t blow a fuse.
Bob
'65 Impala SS 396 Convertible
Member, National Impala Association |
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Red71Shark
Moderator & "3rd Year" Silver Supporting Member
Posts: 2464
Age: 72
Loc: Perpetually lost...
Reg: 06-01-99
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08-31-24 09:26 AM - Post#2873279
In response to Magnetocheck
Thanks for the reply! Fuse did not blow this time, just the first time when the original pump failed. I can get the pump to run by sending voltage through the pump side of the connector (female side). I can also get 12v at the voltage side of the connector (male side) when first turning on the ignition. It's just that the pump doesn't run when I connect the male side of the connector to the female side of the connector...
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bobb
Super Senior Member
Posts: 6760
Loc: paradise
Reg: 09-05-03
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08-31-24 09:54 AM - Post#2873282
In response to Red71Shark
that green crust is bad. scrape it all off and put some grease on it.... also it may have gotten into the wire itself. you may want to replace the pigtail.
| 70 L camino, grampa engine, g-force 5 spd, road rage suspension. Pray first before all else fails. |
Edited by bobb on 08-31-24 09:55 AM. Reason for edit: No reason given.
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Red71Shark
Moderator & "3rd Year" Silver Supporting Member
Posts: 2464
Age: 72
Loc: Perpetually lost...
Reg: 06-01-99
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08-31-24 09:59 AM - Post#2873284
In response to bobb
OK thanks!
My dream ride is a '69 El Camino SS 427 4-speed in black. (Did they even make any of those combinations???)
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Magnetocheck
"2nd Year" Silver Supporting Member
Posts: 505
Age: 69
Loc: Charlotte, NC, USA
Reg: 09-05-22
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08-31-24 03:33 PM - Post#2873297
In response to Red71Shark
Sounds a little weird. I would agree with Bobb, maybe just replace the pigtail if you can't clean it up, or if you can't find a good replacement, just solder the 12V hot wire to the terminal and put some shrink wrap tubing on it for now until you find a replacement. BTW, do you have a good ground? 'Vettes are notorious for grounding issues with all that fiberglass. I would think it's ok, but I'm not familiar with your F/P wiring in this case.
BTW, As far as I know, Chevy never made a 1969 427-4 speed ElCo. You would have to "settle" for a 396 but you could paint it any color you want! 
Bob
'65 Impala SS 396 Convertible
Member, National Impala Association |
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Red71Shark
Moderator & "3rd Year" Silver Supporting Member
Posts: 2464
Age: 72
Loc: Perpetually lost...
Reg: 06-01-99
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09-01-24 07:56 AM - Post#2873318
In response to Magnetocheck
The ground comes from the harness and it's zero ohms to ground so that's good. (Although I do know firsthand the gremlins of the Corvette grounds!!) I think I'm at the point of replacing the pigtail with a new connector.
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bobb
Super Senior Member
Posts: 6760
Loc: paradise
Reg: 09-05-03
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09-01-24 10:41 AM - Post#2873331
In response to Red71Shark
i have a 69 front clip. couldnt find a decent 69 in 88 so i ended up with what i have. i think you could have ordered anything you wanted back then. do not trust voltage or ohm readings. one strand of wire can give you a positive reading. only load testing or voltage drops will tell the truth. quick and dirty load test, use a headlight bulb.
| 70 L camino, grampa engine, g-force 5 spd, road rage suspension. Pray first before all else fails. |
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Red71Shark
Moderator & "3rd Year" Silver Supporting Member
Posts: 2464
Age: 72
Loc: Perpetually lost...
Reg: 06-01-99
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09-02-24 12:31 PM - Post#2873377
In response to bobb
I eventually bit the bullet and spliced in a new connector. Same issue!! So I got to thinking about what else I changed during the process and as a precaution, I also went to NAPA and got a new fuel pump relay and put it in. So, I decided today to put the original fuel pump relay back in and now she fires up! I never thought a new relay would immediately fail after one startup!! Anyway, thanks you guys for all your help and suggestions.
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Magnetocheck
"2nd Year" Silver Supporting Member
Posts: 505
Age: 69
Loc: Charlotte, NC, USA
Reg: 09-05-22
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09-03-24 03:36 AM - Post#2873399
In response to Red71Shark
Glad you figured it out! This problem with bad replacement parts is pretty common these days, as the quality available just is not what it was.
Bob
'65 Impala SS 396 Convertible
Member, National Impala Association |
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Red71Shark
Moderator & "3rd Year" Silver Supporting Member
Posts: 2464
Age: 72
Loc: Perpetually lost...
Reg: 06-01-99
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09-03-24 05:45 AM - Post#2873405
In response to Magnetocheck
Now that pretty much everything is made in China, quality is in the toilet... Thanks again for your help with this!
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