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I took off throttle body on my rodeo and seen fuel spitting out of the port that goes to fuel pressure regulator should this b happening

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  • Cars & Trucks Master
  • 880 Answers

No. check to see if it is crossthreaded or loose. fuel is never vented to the outside.. it is returned to tank via the return hose.

Posted on Mar 30, 2015

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6ya6ya
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Posted on Jan 02, 2017

  • 314 Answers

SOURCE: 2002 chevy Blazer hard starting

This sounds like the fuel pump is shot. The pump has a 'dead' spot and when the engine is started by using 'nasty' starting fluid it will go to the running mode and run fine. Never use starting fluid!!! A bit of gas is best, just use common sence. Frankster016

Posted on Nov 26, 2008

jagjeffery
  • 316 Answers

SOURCE: throttle body injectors not fiering but there is fuel pressure

the injectors are fired thru the engine cotrol module but it gets its signal to fire from the pick-up located inside the distributor if you are loosing injector pulse only the ignition module is bad if you are also loosing spark when you loose injector pulse your pick up is causing the problem if you replace the pick-up i recomend you change the ignition module when doing so because they work together and you have to remove the distributor to change the pick-up

Posted on May 31, 2009

rad64us
  • 45 Answers

SOURCE: Where is the Fuel Pressure Regulator on a 1996

on the fuel injector line

Posted on Jun 30, 2009

herbalgarden
  • 344 Answers

SOURCE: 95 2.5 jeep wrangler stalls consistantly and will

I had the same issue with my 4.0, I went through all the same BS you did and in the end it was a faulty fuel pump. Pricy i know but im sure thats your problem

Posted on Nov 15, 2009

SOURCE: 2000 chevy tahoe z71 5.7 v-8 vortec

I can think of four things. Do each in turn and test the engine after completing each one. If it gets fixed early in the list avoid the items later on. 1) check that your throttle interior is clean 'like new' along with the idle air control valve.
2) Idle Air Control Valve IACV - How to check? Physically remove the IACV but keep the electrical connection to it and loosely blank off the ports to the throttle inlet assembly, exposed by the IACV removal. Turn the engine on and examine the IACV valve movement in response to additional loads (power steering inputs etc). The valve should open and close according to demand causing perceptible change in engine speed with increased power demand being made on the engine.

The electrical connector to the IACV can have 2 or 4 pins:-

2 pins: resistance between pins should about 10 OHMS +/- 3 OHMS. Resistance between either of the pins and the valve body is greater than 10,000 OHMS

4 pins: resistance between diagonally positioned pins should be about 20 OHMS
How to fix? If the motor of the IACV has failed then replace it. If the valve is gummed closed by baked oil and carbon then clean it thoroughly with carburetor choke cleaner spray and a cloth. Similarly if the entry and exit ports on the throttle body to the IACV look blocked again clean them out thoroughly
3) Throttle Position Sensor TPS - How to check? The socket for electrical connection with the TPS has 3 pins, one for 'ground', one for 5 volts 'reference' and a third (generally the middle one) for 'signal' output. Back probe the signal pin in the connector to the TPS. Attach the positive lead of a voltmeter to the probe and measure the voltage output as the throttle plate is rotated. If working correctly the meter should show a voltage consistent with the throttle position from approximately 1 volt when closed and 5 volts when fully open. What is looked for is smooth voltage increase with throttle change. If there are drop outs in the transition or that there is no transition seen the TPS is faulty.

How to fix? If the track is dirty causing drop outs, try cleaning it with residue-free electrical cleaning spray. If the track is worn it is perhaps easiest to replace the complete device. In some instances it may be possible to adjust the location of the central mount of the TPS contact arm along the throttle shaft by a few millimeters and in the process cause a fresh concentric region of



4) Fuel pressure regulator _ Yes I know you have checked it for pressure but at start up when the ignition is at position 2 the fuel pump starts up and pressurizes the fuel rail. As you turn to position 3 "ignition" power is cut to the pump and fuel pressure is maintained by a non-return valve in the pump. If that valve is faulty the fuel pressure in the rail will drop to zero just when you need it and no fuel can be injected. Check the fuel pressure when at position 2 and then switched off; fuel pressure should be maintained for up to 5 minutes with little or no loss. If there is pressure loss then either the non-return valve is faulty or you have leak in the fuel pressure regulator. If it is such a leak, fuel will dribble from the vacuum line connected to it when disconnected.

Posted on Nov 25, 2010

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Spitting back in throttle body?


Should be no fuel until the engine cranks,if fuel comes out with the key on the injector is bad or the ecm is faulty. If there is no fuel untill cranking,
blame the pressure regulator

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How to replace fuel pressure regulator on 1997 jeep grand cherokee


Hi Cassandra:
Check this procedure to removal and installing Fuel Pressure Regulator...

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Fig. 1: TBI fuel pressure regulator

  1. Remove the throttle body assembly from the vehicle as outlined in this section.
WARNING To prevent spring pressure release, hold the regulator housing against the throttle body while removing the mounting screws.
  1. Remove the three retaining screws that hold the pressure regulator to the fuel body.
  2. Disassemble the pressure regulator assembly. Note the location of the components for reassembly. Discard the gasket.

To install:
  1. Install a new gasket and the regulator assembly. Tighten the three retaining screws.
  2. Install the throttle body assembly as outlined in this section.

WARNING The pressure regulator diaphragm MUST be installed with the vent hole aligned with the vent holes in the throttle body and regulator housing!
Hope this helps; also keep in mind that your feedback is important and I'll appreciate your time and consideration if you leave some testimonial comment about this answer.

Thank you for using Fixya, and have a nice day.

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I have a 1996 gmc yukon 4x4 have flood problems I have put in new fuel pump has good fuel pressure changed coolant sensors changed throttle body changed computer plugs wires distributor cap and button coil...


Possibly a busted fuel pressure regulator diaphragm. The regulator is mounted to the end of the fuel rail.
With the engine idling, pull the vacuum line off the regulator port. If gas comes out of the port, replace the regulator.

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1 Answer

Where is the fuel pressure regulator located on a 1996 jeep grand cherokee, laredo, straight 6 cyl.?


it's under the throttle body

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Fig. Fig. 1: TBI fuel pressure regulator

  1. Remove the throttle body assembly from the vehicle as outlined in this section.

WARNING To prevent spring pressure release, hold the regulator housing against the throttle body while removing the mounting screws.
  1. Remove the three retaining screws that hold the pressure regulator to the fuel body.
  2. Disassemble the pressure regulator assembly. Note the location of the components for reassembly. Discard the gasket.
To install:
  1. Install a new gasket and the regulator assembly. Tighten the three retaining screws.
  2. Install the throttle body assembly as outlined in this section.
WARNING The pressure regulator diaphragm MUST be installed with the vent hole aligned with the vent holes in the throttle body and regulator housing!

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I have a 1997 rav4..4cyl stalls when taking off from a stop.i have a scan tool.at idle engine load % is 30-40..tps % 19 no codes.happens more when cold ant turning.it stalled today, and rolling nuetral...


Since you are not getting any codes , I think your problem may be in the fuel system.Have you checked the fuel pressure / regulator? Or any voltage drop in the system.

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TPS throttle positioning sensor......Located on the throttle body and looks like this pic attached Top pic is TPS and Other is the regulator



Fuel pressure reg 4.3L Engines
  1. Properly relieve the fuel system pressure.
  2. Disconnect the negative battery cable.
  3. Remove the upper intake manifold.
  4. Remove the fuel pressure regulator retainer clip.
  5. Twist and pull the fuel pressure regulator in order to remove the regulator from the housing using a shop towel to catch any spilled fuel.
  6. Remove and discard the regulator seal O-ring.
  7. Remove and discard the regulator filter.
  8. Remove and discard the regulator seal O-ring.
  9. Remove and discard the backup ring.
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Jul 12, 2009 | 1991 Isuzu Rodeo

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