1982 Oil Pressure Switch
Thread Starter
Cruising
Joined: May 2010
Posts: 11
Likes: 0
From: Augusta Michigan
1982 Oil Pressure Switch
Having problems getting a recently purchased 1982 coupe running. The car was wrecked in 2008 and has been sitting since then, engine turns over, starts on ether and I can hear the fuel pump cycle on and off as it should when the ignition is turned on. Everything seems to point to the oil pressure switch, so my question is, do I need to change it or can it be reset? Can I bypass it to test the theory?
Drifting
Joined: Aug 2009
Posts: 1,346
Likes: 160
From: new iberia la
temporarily bypass it, see if thats the problem, if it is, replace it... ..its just a safety feature, in case of accident, with the key on, the electric pump will not continue to run and pump gas to a fire if theres no oil pressure
Melting Slicks
Joined: Jul 2005
Posts: 2,740
Likes: 3
From: Aurora Ontario
Try just unplugging it.
Jim
Melting Slicks
Joined: Jul 2005
Posts: 2,740
Likes: 3
From: Aurora Ontario
Melting Slicks
Joined: Jul 2005
Posts: 2,740
Likes: 3
From: Aurora Ontario
Check the basics first. Is the ECM fuse good (located beside the battery)?
Are the fuses in the panel all good? Check the logical ones, ignition and Injector fuses,.
Make sure everything is connected at the distributor.
Are the fuses in the panel all good? Check the logical ones, ignition and Injector fuses,.
Make sure everything is connected at the distributor.
Last edited by jdp6000; Jan 13, 2013 at 01:36 PM.
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Melting Slicks
Joined: Jul 2005
Posts: 2,740
Likes: 3
From: Aurora Ontario
When you turn the key to on you should hear the fuel pump for a second or two followed by a funny noise from the injectors. It's the prime pulse. You don't need to crank the car for this to happen, just turn the key to on.
Racer
Joined: Sep 2009
Posts: 437
Likes: 3
From: Alvin Texas
The start sequence is something like this, turn on key you should hear the pump run for a second or two, you should dear a buzz from the injectors. You can actually see gas being emitted from them.
Fuel filter ??? these things are finicky about fuel pressure and any loss of it can cause a start/ run issue. Do you have a GM factory service manual? if not get one. It has the best diagnosis instruction of any.
Go and replace the filter, it doesn't cost much and probably needs it anyway.
Fuel filter ??? these things are finicky about fuel pressure and any loss of it can cause a start/ run issue. Do you have a GM factory service manual? if not get one. It has the best diagnosis instruction of any.
Go and replace the filter, it doesn't cost much and probably needs it anyway.
Thread Starter
Cruising
Joined: May 2010
Posts: 11
Likes: 0
From: Augusta Michigan
well, checked the ECM fuses, both at the battery and in the panel, both good, cleaned them up and pot them back in, checked fuel injection fuses in panel, same thing, still just cranks. Did not hear a buzz from the injectors after cleaning everything up. One more thought, the throttle mechanics were pretty stuck when I began, had to lube them pretty much to get things working, still does not seem like the pedal is coming all the way up, would this make a difference?
Melting Slicks
Joined: Jul 2005
Posts: 2,740
Likes: 3
From: Aurora Ontario
well, checked the ECM fuses, both at the battery and in the panel, both good, cleaned them up and pot them back in, checked fuel injection fuses in panel, same thing, still just cranks. Did not hear a buzz from the injectors after cleaning everything up. One more thought, the throttle mechanics were pretty stuck when I began, had to lube them pretty much to get things working, still does not seem like the pedal is coming all the way up, would this make a difference?
I guess you need to narrow this one down. The question is whether its the fuel pump or something else.
Find out if the injectors are firing. Put a test light on the plug to the injectors and see if it flashes as you crank.