Question about 1990 Chevrolet Corvette

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Fuel pressure regulator can it stop your car from starting

Car sat for years with engine sitting on ground wire harness chopped up , put engine back in, replaced wire harness ,new gas, new fuel filter , new fuel pump, replaced fuel lines, has injector pulse , spark to plugs , new cap and rotor , replaced all sensors , still will not start .

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  • 25 Answers

Fuel lines hook up backwards problem solved...

Posted on Jan 23, 2013

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Posted on Jan 02, 2017

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SOURCE: 90 k1500 tbi no fuel from injectors

from the sounds of it its going to be one of 3 things 1) the injector is bad or 2) there is no power getting to the injector 3) bad relay switch.

1) to find out if the injector is good. pull the injector out and with some wire ground one side and touch the other side to your battery, every time you tap the wire to the bat you should here the injector click..

2) if injector is good get a test light and test to see if power is coming out of the wires that go to injector( on some vehicles you have to have the motor turning over befor power is sent through wire, so have someone turn the key while you check the wires with test light)

Posted on Aug 15, 2009

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SOURCE: no start

could be a couple of things, have you run low, or run out of fuel lately, if so there is a good chance that you picked up trash from the bottom of the tank and clogged your injectors, or your fuel pressure regulator, if you are getting the correct amount of fuel pressers at the fuel rail then i would recommend popping an injector out and have someone turn the key on, if you aren't getting a good healthy mist out of the injector, then chances are they are clogged, and depending on how clogged they are you may need to replace them, i worked as a chevy mechanic for many years, and saw problems like this all the time, the placement of the pumps in the tank was not the best design, so when the tank gets below the 1/4 mark the pump is more likely to pick up trash from the tank, also the pump is liquid cooled and needs to be submerged, and below a 1/4 it is out of the fuel, this makes the pump run hotter and causes premature failure.

Posted on Nov 10, 2008

  • 114 Answers

SOURCE: 1985chevy blazer t10 will not start

Check to make sure you're getting power to the coil when the key is turned. You may need a new ignition switch.

Posted on Apr 22, 2010

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SOURCE: hesitates & starts hard after it is warmed up 1992 5.7 gmc truck

You might try checking the timming if it is out depending on the milage you might need to replace the timing chain and guides good luck

Posted on Dec 11, 2008

  • 2 Answers

SOURCE: I HAVE A 1993 CHEVY S10 BLAZER RUNS GREAT BUT NOW

I pretty much had this same problem what your problem is going to be is more than likely you have a pin hole leek in one of the fuel lines inside the plenum .

Posted on Jan 11, 2010

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What is particularly disturbing is the question of: How are you going about "put[ting] more fuel into the fuel filter"?

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Overreving with no power and excessive gas consumption air filter cleaned map sensor replaced fuel pump and filter


usually caused by busted diaphram in fuel pressure regulator allowing fuel to be drawn thru regulator directly to intake manifold. Pull vacuum line off regulator, plug line with golf tee, start car and watch to see if gas comes out of regulator. If yes, turn off car, replace regulator. The regulator sits near the fuel rail on the top of the engine as shown below. I will paste replacement instructions below from autozone.com in case you need to replace the regulator. Please let me know if you have any questions.
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Removal & Installation

4.2L Engine

  1. Relieve the fuel system pressure.
  2. Remove the air cleaner outlet resonator.
  3. Disconnect the engine wiring harness from the retaining clips at the front of the engine.
  4. Disconnect the fuel pressure regulator vacuum line.
  5. Clean any dirt from the fuel pressure regulator and the surrounding area.
  6. Disconnect the fuel return pipe.
  7. Remove the fuel return pipe retainer.
  8. Remove the fuel pressure regulator retainer.
  9. Remove the fuel pressure regulator.
  10. Inspect the regulator filter screen for contamination. If contaminated, replace the fuel pressure regulator.

To install:
  1. Install the regulator filter.
  2. Install the new O-ring on the fuel pressure regulator.
  3. Lubricate the fuel pressure regulator O-ring with clean engine oil.
  4. Push the fuel pressure regulator into the regulator housing on the fuel rail.
  5. Install the fuel pressure regulator retainer. Tighten the regulator retainer screw to 71 inch lbs. (8 Nm).
  6. Install the fuel return pipe retainer. Tighten the return pipe retainer screw to 71 inch lbs. (8 Nm).
  7. Connect the fuel return pipe.
  8. Connect the fuel pressure regulator vacuum line.
  9. Connect the negative battery cable.
  10. Inspect for leaks:
    1. Turn ON the ignition for 2 seconds.
    2. Turn OFF the ignition for 10 seconds.
    3. Turn ON the ignition.
    4. Inspect for fuel leaks.

  11. Install the engine wiring harness into the retaining clips at the front of the engine.
  12. Install the air intake resonator.

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Hi,
Is it getting gas and fire?
If so and you don't have fresh gas in the tank, I would suspect some bad gas after sitting for 7 years.
Hope this helps. Good luck!

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The ground wire for the fuel pump is separate from the wire harness and may need to be re-grounded. (Common thing to happen) The only other thing you can do is try replacing the the fuel pump relay or the fuel pump it self if it's weak. Believe the fuel pressure for your TBI system is 13 to 14.5 PSI to have your engine run 100%.
Good luck and recheck you wire harness and ground lead wire. Thank you for using Fixya

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if you put some start stuff like you say and start if our gas pressure good the injector dont open first do you have a check engine light when you put the key on if no check computer fuses (ECM) check it out pierre

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