Question about 1991 Chevrolet Camaro

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My friend is replacing an intake on a 91 camaro, but cant remember where the vacuum line for the fuek pressure regulator goes. where can i get a diagram for her

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Google it on google there's lots of diagrams on there. Then just print it out or write it down.

Posted on Feb 08, 2010

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There is a vacuum line off the intake plenum that goes to a check valve and a return fuel line off the fuel regulator to another check valve. Both connect through a "T" and go to the EVAP can by the f


If you are getting Fuel in the vacuum line, it sounds like you could have a bad fuel pressure regulator. Check the line that comes off the Fuel pressure regulator. use a hand vacuum pump see if fuel is being pulled out of the regulator.Replace regulator if you find fuel
coming from that vacuum port.

Feb 02, 2015 | Cars & Trucks

1 Answer

94 z28 chevy camaro fuel pressure check valve location and is there any other names for this item I recently installed a stock replacement fuel pump in my camaro I run 35psi which is low at idle unplug the...


do you mean the pressure relief valve, this is located normally on the low pressure or return side of your fuel rail, this is designed to maintain fuel pressure in your fuel rail constant, e.g. steady running requires steady pressure, acceleration requires increased pressure controled by engine vacuum, if it was on the supply line you can not regulate the pressure supplied to the injecters. stopped engine requires no pressure so the pump gets turned off with the ignitionf

Nov 27, 2013 | Cars & Trucks

1 Answer

91 626 4cyl non turbo will just shut off at stop when engine warm had code 9 change both temp sensors convertor plugs fire when it dies and smell like fuel now have code 17 any ideas


Code 17 is telling you that computer is not seeing Oxygen sensor changing like it should indicating rich or lean engine running condion. Since you are saying smell like fuel, I would guess at too rich. Is your fuel pressure ok. Pressure should be 27-33 psi with vacuum applied to pressure regulator and 34-40 with no vacuum applied. Also disconnect the vacuum line at the pressure regulator with engine running and check to make sure no fuel is present. Older pressure regulator diaphrams will often rupture which will allow liquid gasoline to be drawn directly into the intake manifold via that vacuum line. This could cause stalling and code 17 as well.

May 25, 2011 | Mazda 626 Cars & Trucks

1 Answer

How to replace fuel pressure regulating valve


1991-94 Models - REMOVAL & INSTALLATION
  1. Remove the air intake tube and resonator assembly.
  2. Properly relieve the fuel system pressure.
  3. Remove the bolts from the fuel line clip.
  4. Using a 15 / 16 in. (24mm) backup wrench to prevent damage to the inlet port and bracket, disconnect the fuel inlet and return lines from the pressure regulator/fuel rail assembly.
If difficulty is encountered accessing the fuel return line nut, loosen and/or remove the fuel supply and rail attachment fasteners.
  1. Disengage the fuel pressure regulator vacuum hose.
zjlimited_1134.jpg

Fig. 6: Disengage the fuel pressure regulator vacuum hose

zjlimited_1135.jpg

Fig. 7: Use a suitable wrench to loosen ...

  1. Remove the regulator assembly attaching screw, then remove the regulator assembly. Plug the regulator port in the fuel rail with a clean rag to prevent system contamination.
zjlimited_1136.jpg

Fig. 8: ... and remove the mounting screw from the pressure regulator/fuel rail assembly

zjlimited_1137.jpg

Fig. 9: Remove the fuel pressure regulator assembly from the fuel rail
  1. Do not remove the O-ring from the retainer in the pressure regulator fuel outlet, unless it is damaged and requires replacing. Always remove and discard the O-ring from the fuel inlet.
To install:
  1. Lubricate the new fuel inlet O-ring and, if necessary, the new outlet O-ring with clean engine oil, then install the O-ring(s) in the pressure regulator assembly.
  2. Position the regulator assembly to the fuel rail. Coat the threads of the attaching bolt with Loctite® 242 or an equivalent threadlock, then install the bolt and tighten to 106 inch lbs. (12 Nm).
  3. Connect the fuel pressure regulator vacuum hose.
  4. Connect the fuel inlet and return lines, then tighten the lines to 133 inch lbs. (15 Nm) using a backup wrench to prevent port damage.
  5. Cycle the ignition switch to prime the fuel system, then start the engine and check for fuel leaks.
  6. Turn the ignition OFF and install the air intake tube and resonator assembly.

Hope this helps (remember to rate and comment this answer).

Apr 29, 2011 | 1993 Saturn SL2

2 Answers

When you turn the key on excessive fuel flows into the air intake. its a 1989 6 cylinder 3.1 fuel injected


You could have either an injector that is stuck open or a fuel pressure regulator that has developed a leak. A leaky injector will usually only leak fuel into one cylinder as it is located just above the intake valve in the lower part of the intake while a leaky fuel pressure regulator will leak fuel into the front end of the intake manifold [behind the throttle plates] and the fuel will acuumulate throughout the upper intake plenum. When a fuel pressure regulator develops a leak the fuel that is escaping from it flows through the small 1/8" diameter plastic vacuum line which goes from the top of the regulator to the intake manifold. Even a trace of fuel in this line means the regulator is bad. I've seen both leak items leak but probably replace 10 regulators leak for every one injector. Good luck, hope you find your problem!

Jul 22, 2010 | 1989 Oldsmobile Cutlass Supreme

1 Answer

87 IROC WITH A ZZ4 OUT OF A 91 Z28... fitted a


Fuel pressure? Do you hear the fuel pump running? Read the codes to see if ECM is still alive. Do you have spark at the plugs? Remember all motors need 3 things to run air, fuel, and fire at the right time.

Mar 16, 2010 | 1987 Chevrolet Camaro

1 Answer

Where is fuel pressure regulatore located


For 2000 Chevrolet Truck Blazer 4WD 4.3L SFI 6cyl
If your engine is a 4.3L V-6 with CPI (central point injection) it is inside the upper intake manifold. The upper intake manifold is bolted on top of the normal intake manifold.

The throttle body is mounted on it and your fuel lines terminate into the center of this.


Removal & Installation
  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:


aaf5240.jpg
Fig. Fuel pressure regulator-4.2L engine
  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.
Hope help with this (remember rated this post).

Feb 26, 2010 | 2000 Chevrolet Blazer

2 Answers

Vacuum lines


Hello, I have the 1993 Ford Festiva shop manual in front of me. The vacuum hose on the Fuel Pressure Regulator goes to the intake manifold. The manual says that the fuel pressure is maintained at a constant 36.3 psi, and when the engine vacuum drops (caused by high fuel demand) it causes the fuel pressure to increase inside the regulator. There should be a vacuum diagram on the bottom side of the hood that will help to show you what vacuum port on the manifold that it attaches to. If the decal is gone, look on the intake manifold for a vacuum port that is open and causing a vacuum leak. I hope this helps.

Oct 15, 2009 | 1993 Ford Festiva

1 Answer

91 toyota pickup 4cl idles rough when warm when brake is pressed


HI, i would advise to check the following areas for faults. replace any part that is fouled or malfunctioning.

1. Check the air filter- This device may be clogged or dirty. replace if visibly fouled.
2. Check the fuel pressure regulator- pull the vacuum hose of the regulator. if there is gas in it, replace the fuel pressure regulator.(if there is no fuel present in the lines, move on to the next check point)
3. Replace the fuel filter and, check the voltage at th fuel pump. you should get 12V at the pump. if its lower than twelve, chekc the ground for corrosion as well as the entire wiring harness as well. all the way to the relay for fualts.
4. Check the Intake Manifold Gasket for worn or damged edges. this ware and tare will cuase leakge. replace this gasket if found to be fouled in any way.
5. Check the freash air intake hose. this hose may be clogged or damaged.
6. Last but not least, check the injectors for leaking seals and, correct pulse as well. replace any injector with a weak pulse or , leaky seal.


Jul 19, 2009 | 1991 Toyota Pickup

2 Answers

Car starts good but has rough idle and dies in a few seconds.


sound like intake leak. get a scanner to see if egr valve not staying open . check map sensor + make sure the vacuum line didnt come off it . check coolant sensor. oxygen sensor .check fuel pressure regulator. check vacuum line that goes to fuel pressur e regulator . make sure there is no gas in it. make sure its getting vacuum. check pvc valve.shake it make sure it rattle .

Mar 09, 2009 | 1992 Toyota Celica

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