Question about 1994 Chevrolet S-10 Blazer

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I need info on how to replace the fuel pressure regulator on my 1994 chevy s10 blazer 4.3 vortec

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  • mike loshbough
    mike loshbough May 11, 2010

    it is under your intake plenum and it comes with the injectors also called a spider injector.

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Replace with Standard Part # FS503 about $300...complete new unit with all you need but plunium gasket worked wonders for my blazer now gets about 19 mpg

Posted on Mar 05, 2009

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1 Answer

93 s10 blazer with 4.3 liter vortec won't stay


You first need to run a fault code test on this engine, to do that go here.

Oct 10, 2012 | Cars & Trucks

1 Answer

1994 Chevy Blazer S10 : Running to rich..keeps flooding. Have already replaced fuel pressure regulator and computer.


One or more of your injectors are open and dumping gas in the cylinders, have them tested?

Apr 08, 2011 | Chevrolet Blazer Cars & Trucks

1 Answer

I need a diagram for a "94 chevy s10 fuel regulator. We need to replace a fuel regulator and do not know where to look.


if you have the 4.3 then you will need to take off your upper manifold/throttle body which is the big piece that your vortec plate is on, then you will find it with your spider assembly fuel injection it is the part that the electric and injectors go to. have fun

Sep 01, 2010 | 1994 Chevrolet S-10 Blazer

1 Answer

95 S10 blazer 4.3 vortec skipping code po172 and po300 possible solutions


P0172 system too rich bank 1. P0300 random multiple misfire. All are a common symptom of either bad fuel pressure regulator or leaking injector. Need to pull off intake plenum (upper) You should visibly see a clean side or part of intake manifold (lack of carbon buildup) Reconnect fuel lines. Energize fuel pump (turn on key to run) Most likely you will see fuel dripping out of rear (fuel pressure regulator) or nylon lines to each cylinder (fuel injectors). Once you see which is leaking will need to replace. Once they are repaired will need to clean or replace spark plugs & change oil & filter.

Jun 26, 2010 | 1995 Chevrolet Blazer

3 Answers

I have a 92 chevy s10 blazer 4x4 4.3 vortec W i just replaced the fuel pump and fuel filter.. it will start sometimes mainly after it sits overnight but when you drive it you can only drive for about 10...


I had this problem.I removed the fuel pressure regulator and it was full of carbon.Remove it very carefully as to not damage any seals.Remove as much carbon as you can and reinstall.This should solve your problem.

Nov 30, 2009 | 1992 Chevrolet S-10 Blazer

2 Answers

1994 chevy s10 blazer turns over, won't start


try replacing the fuel regulator,or is the oil cap on tight?the fuel regulator works on base vacumm

Sep 05, 2009 | 1994 Chevrolet S-10 Blazer

1 Answer

S10 Blazer 4.3 to a 350 FI


If you live in a state with smog license requirements your wasting your time, the engine has to meet EPA requirements for the year vehicle was manufactured your car is considered a clunker good luck getting it smogged. And it is no big deal to change. 350 is almost identical to 4.3 just some variations.

Aug 20, 2009 | 1994 Chevrolet S-10 Blazer

1 Answer

Fuel presure but no start


its the fuel pressure regulator!!!!!!!!!!

Jun 11, 2009 | 2000 Chevrolet Blazer

3 Answers

I have a chevy blazer 94 S10 still quit on the road.


How is it running before it quits onyou. This could be the culprit of an egr valve. How many miles on thevehicle. The egr seems to die on a certain mileage pattern. Also youcould start by cleaning the egr valve before replacing it. This couldvery well help the situation, but this is just a guess. Hope thishelps!!

Apr 30, 2009 | 1994 Chevrolet S-10 Blazer

1 Answer

1999 chevy blazer wont start


THE FUEL PUMP IS BAD.

if your losing fuel pressure after the pump runs the drain back valve in the pump has failed.

and i doubt that you are seeing enough fuel pressure to run a vortec engine.

low fuel pressure equals a non running vortec

Apr 11, 2009 | 1999 Chevrolet Blazer

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