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T.B.I. Pressure Regulator
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MechanicMike
Novice
Nov 17, 2011, 4:24 PM
Post #1 of 16
(3932 views)
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T.B.I. Pressure Regulator
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1988 Chevy S-10 Blazer 4x4, 2.8 engine:
How do I change the fuel pressure regulator on the T.B.I. Carbuerator?
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Hammer Time
Ultimate Carjunky
/ Moderator
Nov 17, 2011, 5:01 PM
Post #2 of 16
(3905 views)
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Re: T.B.I. Pressure Regulator
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It's not a carburetor, it's a throttle body housing and the regulator is built into it.
It is sold as part of the fuel meter cover and has to be replaced as a unit.
NOTE: The fuel meter cover assembly contains the fuel pressure regulator assembly. The regulator has been adjusted at the factory and should only be serviced as a complete assembly
WARNING: DO NOT remove the four screws securing the pressure regulator to the fuel meter cover. The fuel pressure regulator includes a large spring under heavy compression which, if accidently released, could cause personal injury. Disassembly might also be result in a fuel leak between the diaphragm and the regulator container.
REMOVAL:
- Disconnect electrical connectors to fuel injectors. (Squeeze plastic tabs and pull straight up).
- Remove long and short meter cover screw assemblies.
- Remove fuel meter cover assembly. NOTE: DO NOT immerse the fuel meter cover (with pressure regulator) in cleaner, as damage to the regulator and gasket could occur.
- Remove fuel meter outlet gasket and pressure regulator seal. Discard old gaskets and seal.
INSPECTION:
- Inspect for dirt, foreign material and casting warpage.
INSTALLATION:
- Install a new pressure regulator seal, fuel meter outlet passage gasket, and cover gasket.
- Install fuel meter cover assembly.
- Install attaching screw assemblies, precoated with appropriate locking compound to threads. (Short screws are next to injectors.) Tighten screw assemblies to 3.0 Nm (28.0 lb-in).
- Reconnect electrical connectors to fuel injectors.
- With engine OFF, and ignition ON, check for leaks around gaskets and fuel line couplings.
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We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.
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MechanicMike
Novice
Nov 17, 2011, 5:22 PM
Post #3 of 16
(3894 views)
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Re: T.B.I. Pressure Regulator
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So to replace the Pressure Regulator, you have to replace the fuel meter cover as an assembly/unit? How much is that part? Car Quest has a rebuild kit for $70 and Napa for $42 & $56... Your telling me it's set at the factory as an assembly. What does it take to rebuild it? If the spring is under heavy load... I have every tool/press imaginable. I just need a spec. and diagram etc. Thanks so much for your help.
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Hammer Time
Ultimate Carjunky
/ Moderator
Nov 17, 2011, 5:32 PM
Post #4 of 16
(3887 views)
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Re: T.B.I. Pressure Regulator
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A rebuild kit is not but gaskets and seals. it doesn't include a regulator.
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We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.
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MechanicMike
Novice
Nov 17, 2011, 5:37 PM
Post #5 of 16
(3883 views)
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Re: T.B.I. Pressure Regulator
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Do they sell a regulator? Do I have to buy the whole assembly? I know how it is when ya call for parts, but you would know best! What am I looking for?
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MechanicMike
Novice
Nov 17, 2011, 5:39 PM
Post #6 of 16
(3880 views)
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Re: T.B.I. Pressure Regulator
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What would you do?
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Hammer Time
Ultimate Carjunky
/ Moderator
Nov 17, 2011, 5:40 PM
Post #7 of 16
(3875 views)
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Re: T.B.I. Pressure Regulator
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I have already given you answers and detailed instructions.
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We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.
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MechanicMike
Novice
Nov 17, 2011, 5:47 PM
Post #8 of 16
(3866 views)
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Re: T.B.I. Pressure Regulator
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I'm unclear if the gasket and seal kit will resolve the pressure regulator problem. Will it?
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MechanicMike
Novice
Nov 17, 2011, 7:14 PM
Post #10 of 16
(3853 views)
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Re: T.B.I. Pressure Regulator
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Yeah, I've read them and ya' didn't answer the question at all.
So the diaphram that comes with the kit, operates the Pressure Regulator? Correct?
How often is the regulator a part that's replaced?
The Regulator is an un-servicable part and never needs to be replaced?
By using this "KIT", Will that fix the regulator situation?
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Hammer Time
Ultimate Carjunky
/ Moderator
Nov 17, 2011, 7:19 PM
Post #11 of 16
(3848 views)
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Re: T.B.I. Pressure Regulator
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I can't answer all your questions. I'm sitting at a computer miles away. I don't know what's wrong with your car or why you are even contemplating changing a regulator. I haven't seen the kit you are pricing so I can't tell you what they are going to give you with it. You asked how to change a regulator and that's what I gave you.
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We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.
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MechanicMike
Novice
Nov 17, 2011, 7:35 PM
Post #12 of 16
(3843 views)
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Re: T.B.I. Pressure Regulator
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Well now I feel stupid. Hmm Sorry man.
Fuel Pressure is dropping off under load
Engine Cuts out
New pump and filter.
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Hammer Time
Ultimate Carjunky
/ Moderator
Nov 17, 2011, 7:42 PM
Post #13 of 16
(3836 views)
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Re: T.B.I. Pressure Regulator
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You're assuming something that you haven't troubleshooted yet. You need to use a fuel pressure gauge to find out what is going on. Regulators can fail in different ways. They can leak fuel internally or they can bypass at too low of a pressure. With a scan tool you can monitor what the fuel adaptives are doing, whether they are moving lean or moving rich and that will give you a good idea on what to blame. You can restrict ti return line to see if that causes an increase in fuel pressure to know the pump and filter is good.
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.
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MechanicMike
Novice
Nov 17, 2011, 7:53 PM
Post #14 of 16
(3832 views)
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Re: T.B.I. Pressure Regulator
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Fuel pressure is at 12-13 psi but it drops off when I'm cruising and under load. I have a glass filter and can see the fuel filter is full. Scan tool is obsolete. I found a website with an ALDL link jumper wire I can make and they have software for my laptop, to view what your talking about, I believe.
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MechanicMike
Novice
Nov 17, 2011, 7:55 PM
Post #15 of 16
(3827 views)
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Re: T.B.I. Pressure Regulator
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I'd rather listen to a pro like you then the bone heads tellin me to buy the kit and change the diaphram in the regulator system.
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samg.
User
Nov 19, 2011, 11:53 AM
Post #16 of 16
(3802 views)
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Re: T.B.I. Pressure Regulator
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It really sounds like you're in over your head bro. You could throw pumps, sensors, treatments etc at it, but those won't fix a bad ground, ya know?
Take it somewhere with the CORRECT equipment, if after the diag you feel you can do the repair, have at it.
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