Question about 1994 Chevrolet S-10 Blazer

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Where is the oil pressure/fuel pump switch located on a 1994 chevy blazer s10

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I will assume this is a 4.3 engine, the oil pressure /fuel switch is located on the rear of the engine next to distributor, what is the problem?

Posted on Dec 08, 2012

  • Sabrina D'amour Dec 09, 2012

    yes it is a 4.3 vortec. the engine will turn over but not start. I have started from the rear and trial and error. the fuel pump is good, new filter, checked injectors. I know I need new plugs, and distributer but just before it stopped running it had really low oil pressure when idling so am just checking all my options.

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Posted on Jan 02, 2017

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SOURCE: 1991 chevy S10 blazer fluctuating oil pressure

I assume from the year it has high mileage. With mileage comes wear in these engine's bearings allowing oil pressure to drop because of the excess clearance between cam and bearings, also the crank and bearings. When the engine is hot and idling the oil is thinner and goes by the bearings quicker. If you have good oil pressure while driving, I'd leave it alone, maybe use a thicker oil or some lucas additive. My 89 does the same thing sometimes in the summer, but don't remember it doing it this summer. I use Mobil-1 and an AC Delco filter.

Posted on Oct 17, 2009

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Chiefnadc
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SOURCE: location of oil pressure switch in a chevy blazer

should be close to the oil filter or where the oil lines going to the filter attach to the engine block

Posted on Jun 19, 2009

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SOURCE: 1987 chevy s10 2.5l tbi will not start. changed

That eliminates the crankshaft and camshaft position sensors. Have you checked the fuel injector itself for an open winding or stuck valve plunger? There should not be a steady 12 volts to the injector--if good injector, it would be spraying fuel steadily into the throttle body. But at least the engine should try to run if poorly. Take the injector out, dry it off with air, and intermittently apply 12 volts to one terminal while grounding the other. You should hear a click from inside every time you touch 12 volts. If not, replace it. If it does, it may be plugged with debris. Try blowing through it in reverse with compressed air.

Posted on Jul 17, 2009

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SOURCE: 93 chevy s10 blazer fuel pump replacement

Check the magnets on the distributor. Mine did all these symptoms and turned out the magnets had depolarized. Replace them or at least check for magnetic pull. Wierd but true.

Posted on Dec 26, 2009

  • 1 Answer

SOURCE: where is the oil sending unit located on a Chevy S10 Pickup.

MY S-10 IS LEAKING OIL. I WANT TO KNOW WHERE THE OIL SENDING UNIT IS.

Posted on Sep 13, 2010

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1 Answer

1991 chevy S10 blazer fluctuating oil pressure


I assume from the year it has high mileage. With mileage comes wear in these engine's bearings allowing oil pressure to drop because of the excess clearance between cam and bearings, also the crank and bearings. When the engine is hot and idling the oil is thinner and goes by the bearings quicker. If you have good oil pressure while driving, I'd leave it alone, maybe use a thicker oil or some lucas additive. My 89 does the same thing sometimes in the summer, but don't remember it doing it this summer. I use Mobil-1 and an AC Delco filter.

Oct 17, 2009 | 1991 Chevrolet S-10 Blazer

2 Answers

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Sep 05, 2009 | 1994 Chevrolet S-10 Blazer

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Turn signal relay switch, 94 s10 chevy blazer


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May 27, 2009 | 1994 Chevrolet S-10 Blazer

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Have you check fuel pressure at idle should be 29-30psi. Leave guage on and start it and press the gas peddle it should jump to 40psi if not then the fuel pump is weak or is going to fail. Does the Blazer have high mile? if so its probably the fuel pump.

Apr 21, 2009 | 1994 Chevrolet S-10 Blazer

1 Answer

Fuel Pressure Relay location


Hello, There is no fuel pressure relay. If you mean fuel pump relay, you can find this by opening hood, look towards driver's area, on the firewall just below the cowl vents you should see a relay with 5 wires going to it.
CYA, Gator241

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93 chevy s10 blazer fuel pump replacement


try yhe pickup coil or ignition module wich are both located on the distributor or the igniton coil.im going through the same thing.all i have left to try is the ignition module.if i get it ill be sure to let you know

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1 Answer

Where is fuel relay


The fuel pump relay is only for the fuel pump priming when you turn on the key. After the vehicle starts the oil pressure switch takes over and runs the pump. If the pump is shutting off after the motor is running the oil pressure swith is probably bad. Let me know if i can help you further.

Dec 27, 2008 | 1994 Chevrolet S-10 Blazer

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