Question about 1993 Chevrolet S-10 Blazer

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Start hard runs rich

Where is the fuel pressure regulator on a 1993 s10 blazer?

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Hi all the injectors and reg is inside the intake and are good about going bad. the top of the intake got to come off.

Posted on Jul 27, 2009

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My 1993 chevy s10 blazer 4.3 has trouble starting in the morning, i live in fl so its not cold, i replaced the pump and plugs still hard to start and acts like its flooded


Your truck requires 60psi or more of fuel pressure to start.
Have you had the pressure checked before and after replacing the pump, and did you replace the fuel filter too ?
Could also be a fuel pressure regulator issue.

Jul 01, 2012 | Cars & Trucks

1 Answer

1995 chevy s10 blazer not holding fuel preasure when not running


The pressure regulator is in the intake manifold when they go bad it either give low pressure or leak out affecting engine performance by burning rich(black smoke)

Mar 01, 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

My 1993 s10 blazer is hard to start, cold starts runs for 15 seconds then dies and wont start after that! have fuel pressure and can hear pump run. good spark what could it be?


Check the fuel pump relay its inside the glove box the one on the left side of 3 relays . The fuel pump will still work on this vehicle ever if the relay is bad . The system is backed up by the oil pressure sending uint and that will supply power to the pump it just takes it some time for the engine to build up enogh oil pressure to trip the switch so it takes a long time to start and you may think of replaceing the unit as well that could be intermitant also check your fuel filter its under the drivers side door mounted to the frame

Feb 05, 2011 | 1993 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 a1993 S10 blazer done tune but still run,s rough and smoke,s blueest,gray and smells like heavy gas.212,000 miles.What could be the problem.


If you have a 4.3L engine, check injector assembly sit inside intake manifold, I have seen many times where the fuel lines or fuel pressure regulator go bad and will cause a rich fuel mixture, remove intake disconnect ignition coil with intake off turn key just to on and check for leaks, more then likely your problem.

Jan 15, 2010 | 1993 Chevrolet S-10 Blazer

2 Answers

I HAVE A 1993 CHEVY S10 BLAZER RUNS GREAT BUT NOW IT IS RUNNING RICH THE ENGINE IS NOT BURNING THE FUEL RIGHT I GOT SPARK JUST TO MUCH FUEL THE EXSHAUST IS BLOWING WHITE SMOKE AND SMELLS LIKE FUEL BAD,I...


unplug thr coolant sensor ifitsone with the plastic top try to move it with your fingers if it turns slightly ittl be bad,
even thou to besure do a voltage check,a feuel presure test can't huurt,last but not least an injector balance test

Dec 12, 2009 | 1993 Chevrolet S-10 Blazer

1 Answer

Blazer rumbling,choking,missing in engine


Check the fuel pressure regulator. generally "failure" position is full open which will richen up the fuel mixture. also check vacuum line to the regulator for cracks and good connection.

Jun 06, 2009 | 1995 Chevrolet Blazer

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