C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

1985 corvette help pls

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Old 01-20-2019, 03:08 PM
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Mason123
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Default 1985 corvette help pls

Why are the 84-86’s so broken LOL

anyways I have an 85’. Lots of problems.

first changed the battery, then the fuel pump, then the relays, then the fuses.

about to change the coil and distributor cap/rotor.

anyways here’s the question.

no powers going to the fuel pump. I tested the pump, it’s working, and I jumped the pump from the relay, so the electrical problem is somewhere from the battery to the relay. Which wires do I check and where are they? It’s nowhere from the pump to the relay, but idk. Somethings up. Help. Please. Thanks.

i just wanna drive
Old 01-20-2019, 03:28 PM
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playsdixie
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try putting 12v to pin G on your ALDL....should start the pump.....ignition turns pump on for 2 sec.....after 4 lbs oil pressure, oil switch powers it.....should hear a "click" from the relay when you turn on key.....it only stays on for 2 seconds....hope this helps....
Old 01-20-2019, 03:35 PM
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Benny42
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Your ECM should run the pump for a couple of seconds when you turn the key on. Then the ECM looks for pulses from the distributor to
turn the pump back on. If you don't get the key-on pump cycle, the fuses, fuel pump, and ECM are the usual suspects. Pull a spark plug
wire and put a paper clip in it to check for spark. It sounds like an ECM issue but it could be distributor.
Old 01-20-2019, 03:47 PM
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xrav22
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Mabey this helps from my 85, be sure to check all the wiring to make sure the cover hasn't shrunk down and the connectors are clean. I spliced all new connectors in a while back, anyway the important ones. Good Luck


page 1 fuel

page 2 fuel
Old 01-20-2019, 04:43 PM
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Moved-To-TN
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Please don't say they are always broken I have only had my 85 for 2 weeks LOL other than a couple little things going on That I have asked questions about (NO response yet) I am keeping my fingers crossed. Good luck with yours.
Old 01-20-2019, 07:23 PM
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playsdixie
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Originally Posted by Moved-To-TN
Please don't say they are always broken I have only had my 85 for 2 weeks LOL other than a couple little things going on That I have asked questions about (NO response yet) I am keeping my fingers crossed. Good luck with yours.
85's a great year....but without turning some wrenches, they're not daily drivers anymore.....
Old 01-20-2019, 07:34 PM
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Moved-To-TN
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I will get her done just sorting out a few bugs and neglected maintenance

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