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Fuel pressure regulator?

Tiny
DJWALSH65
  • MEMBER
  • 2000 GMC SIERRA
  • V8
  • 4WD
  • AUTOMATIC
  • 180,000 MILES
A couple days ago the engine quit while driving, just like it ran out of gas except it had 1/2 a tank. I can hear the fuel pump come on. I changed the fuel filter and I need to change the fuel pressure regulator. Where do I look next?
Tuesday, May 10th, 2011 AT 4:53 PM

11 Replies

Tiny
IMPALASS
  • MECHANIC
  • 3,112 POSTS
Hello

According to the attached information as you see, there is no vacuum hose connected because it sits in vacuum. You can see the hose hook up on the attached diagrams. Also, I attached the directions and it states the same.


https://www.2carpros.com/forum/automotive_pictures/248015_58885441_1.jpg




https://www.2carpros.com/forum/automotive_pictures/248015_2_18.gif




https://www.2carpros.com/forum/automotive_pictures/248015_3_15.jpg



REMOVAL PROCEDURE

Disconnect the negative battery cable.
Relieve fuel system pressure. Refer to Fuel Pressure Release Procedure .
Remove the upper manifold assembly. Refer to Engine Mechanical .
DISASSEMBLE PROCEDURE

Disassemble the fuel pressure regulator snap ring retainer.
Disassemble the regulator assembly and the O-rings.
Discard the O-rings. NOTE : If the fuel pressure regulator is to be reinstalled, inspect the filter screen (if equipped) for contamination. If contaminated, remove. Discard the filter screen.
ASSEMBLE PROCEDURE

Lubricate the new O-rings with clean engine oil.
Install as an assembly, backup O-ring, large O-ring, filter and small O-ring.
Assemble the regulator with vacuum tube pointing down and snap ring retainer.
INSTALLATION PROCEDURE

Install the upper manifold assembly. Refer to Engine Mechanical .
Disconnect the negative battery cable.

This guide can help as well

https://www.2carpros.com/articles/how-to-check-fuel-system-pressure-and-regulator

Please run down this guide and report back.
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Tuesday, August 13th, 2019 AT 11:07 AM (Merged)
Tiny
RANEJERES
  • MEMBER
  • 1 POST
  • 1999 GMC SIERRA
  • 5.3L
  • V8
  • 2WD
  • AUTOMATIC
  • 200,000 MILES
I changed the regulator and I can not get the clamp locked into place. There is a filter looking cylinder in there, Is that supposed to be inside or do I need to remove it?
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Tuesday, August 13th, 2019 AT 11:09 AM (Merged)
Tiny
HMAC300
  • MECHANIC
  • 48,601 POSTS
See pictures for instructions you should remove the old filter and replace with a new one and lube o rings with oil prior to install. Then push regulator into clamp in place.
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Tuesday, August 13th, 2019 AT 11:09 AM (Merged)
Tiny
JUSTER
  • MEMBER
  • 2 POSTS
  • 1998 GMC SIERRA
  • V8
  • 4WD
  • AUTOMATIC
  • 157,000 MILES
I have just replaced my transmission and it the truck ran great until I took it on a long trip. During acceleration it would start to stall if you pressed the gas pedal. It would idle perfect, but if you tried to speed up it would bog down. I replaced the fuel pump and filter about 7 months ago and luckily it was still on warranty. I heard the fuel pump start to whine really loud so I figured I had a fuel pump/filter problem. If I were to turn the truck off and turn the key several times to prime the pump and build up pressure it would drive for about 30 minutes until it lost pressure (I guess). I have done several things since and I am very frustrated. First of all I did what any novice would try. I changed the fuel filter first, replaced the fuel pump and drove for about two hours and then the symptoms came back. Did some research and figured it was the fuel pressure regulator. I took a look at the fuel injectors and figured while I had the intake manifold off I might as well change out the Injectors. Invested in the new MFI injector system. I figured I replaced everything that could possibly be the problem and the truck seemed to run fine so I thought I would take a trip. Got about 1 hour out and the same problem presented itself. There is one more thing - My gas gauge flickers and has ever since I put on the first fuel pump. WHAT AM I MISSING? Please help.
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Tuesday, August 13th, 2019 AT 11:09 AM (Merged)
Tiny
JDL
  • MECHANIC
  • 16,098 POSTS
Welcome to the forum. Did you ever use a gage and check fuel pressure? Maybe it wasn't a fuel issue? When it stalls, if it won't restart for a few minutes, have helper crank it, while you check for spark at the plugs. Any trouble-codes?
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Tuesday, August 13th, 2019 AT 11:09 AM (Merged)
Tiny
JUSTER
  • MEMBER
  • 2 POSTS
Got Spark, the truck starts and idles great. No check engine light and all my codes have cleared. I will have to take it to the auto hobby shop and borrow thier pressure tester. I also thought it might be the fuel relay or maybe just the wiring to the pump. I was going to check the voltage to the pump on idle. Anyone know what the pressure and/or voltage/amperage should be? Is the catalytic converter a possibility?
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Tuesday, August 13th, 2019 AT 11:09 AM (Merged)
Tiny
JDL
  • MECHANIC
  • 16,098 POSTS
Fuel pressure shows to be 60--66 psi, key on engine off. As far as voltage, take a reading across the battery posts, engine running. The reading at the fuel pump connector, for the pump motor, should be close to the same. A clogged exhaust could cause some problems?
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Tuesday, August 13th, 2019 AT 11:09 AM (Merged)
Tiny
JESSESANDBERG
  • MEMBER
  • 40 POSTS
  • 1996 GMC SIERRA
  • 200,000 MILES
Driving home one day and the vehicle just shut down, did not cough or spudder or give any signs of problems, just shut down, engine will try to crank over but will not start, theres air and spark and seems to not have enough fuel pressure, changed fuel filter, fuel pump, was going to try the fuel pressure regulator, and ignition control module, is there any other things I could try, and what may be the problem? The engine was running fine hours before.
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Tuesday, August 13th, 2019 AT 11:10 AM (Merged)
Tiny
DRCRANKNWRENCH
  • MECHANIC
  • 3,380 POSTS
Have the fuel pressure checked to make sure it is within spec.
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Tuesday, August 13th, 2019 AT 11:10 AM (Merged)
Tiny
JESSESANDBERG
  • MEMBER
  • 40 POSTS
If its not to spec what could I do to get it back to proper pressure?
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Tuesday, August 13th, 2019 AT 11:10 AM (Merged)
Tiny
DRCRANKNWRENCH
  • MECHANIC
  • 3,380 POSTS
I would think the fuel pressure regulator is about all that is left. If it is in spec you might have a dirty fuel system and need to run some good cleaner. BG44K is about the only one that really works. You have to go to a car dealership to get it at the parts counter and its $20 a can, but well worth it. I usually suggest 2 cans if you never ran a cleaner and expect it to act funny as deposits are removed during cleaning.
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Tuesday, August 13th, 2019 AT 11:10 AM (Merged)

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