Fuel Pressure Regulator
Thread Starter
Advanced
Joined: May 2009
Posts: 58
Likes: 0
From: Pomona New York
Fuel Pressure Regulator
Hey guys, I need some help with what tools I need to replace the diaphragm on the fuel pressure regulator. Its a 86 TPI it smells of gas so i think it time to change it. Also what size do I need to take the plenum bolts off also.
thanks for the help
thanks for the help
Racer
Joined: Jan 2007
Posts: 274
Likes: 0
From: Muskogee OK
I just replaced mine Tuesday...not too difficult.
The plenum bolts on my '90 are a T-40.
The regulator has tamper resistant T-10 bolts, so you'll either need the special torx tool, or use a small punch to knock out the pins.
Relieve the fuel pressure and disconnect the battery.
The plenum bolts on my '90 are a T-40.
The regulator has tamper resistant T-10 bolts, so you'll either need the special torx tool, or use a small punch to knock out the pins.
Relieve the fuel pressure and disconnect the battery.
Thread Starter
Advanced
Joined: May 2009
Posts: 58
Likes: 0
From: Pomona New York
Thanks, replaced it in a few min but the car still doesn't start. I'm at a loss right now I really don't know what else to do beside replace the injectors. Any other ideas.
Thanks.
Thanks.
Burning Brakes
Joined: Feb 2009
Posts: 785
Likes: 3
From: Richmond Virginia
did the "no start" occur after any work/repairs or just out of the blue ? do you have spark at the plugs ? Do you have fuel pressure when cranking? do you have compression ? Need more info in order to be able to make a good WAG lol 
Thread Starter
Advanced
Joined: May 2009
Posts: 58
Likes: 0
From: Pomona New York
Ok so the car sat for a while so I changed the cap rotor wires fuel filter and fuel pump and now the fuel preasure reg. Prior to changing all of that the car only started when tb cleaner was put in. But then crapped out shorty after. When I crank it I smell fuel.
So that's the story.
So that's the story.
Burning Brakes
Joined: Feb 2009
Posts: 785
Likes: 3
From: Richmond Virginia
Ok so the car sat for a while so I changed the cap rotor wires fuel filter and fuel pump and now the fuel preasure reg. Prior to changing all of that the car only started when tb cleaner was put in. But then crapped out shorty after. When I crank it I smell fuel.
So that's the story.
So that's the story.
Thread Starter
Advanced
Joined: May 2009
Posts: 58
Likes: 0
From: Pomona New York
Stupid question but even if it smells like gas you think i should take it all out and start fresh
I check the injectors with the light and there good but i havent checked the pressure yet.
I check the injectors with the light and there good but i havent checked the pressure yet.
Burning Brakes
Joined: Feb 2009
Posts: 785
Likes: 3
From: Richmond Virginia
Not a stupid question...but I would check pressure first..when you say that it sat for awhile are we talking a month..6 months or years? If it's been setting a very long time... IMO old stale gas has a nasty/stale smell unlike what you smell at gas station filling up. If it's been sitting long enough i'd replace the fuel before replacing the injectors. I'd also suggest before replacing the injectors that you check the resistance of each injector with a VOM.....each should be around 16 ohms.
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
10 Reasons the C6 Z06 is Still A Performance Benchmark After 20 Years
Joe Kucinski
How Much Horsepower Every Corvette Engine "LOST" in 1972
Joe Kucinski
Top 10 DOs and DON'Ts for Protecting Your Convertible Top!
Michael S. Palmer
Top 10 Most Explosive Corvettes Ever Made: Power-to-Weight Ratio Ranked!
Joe Kucinski
150 hp to 1,250 hp: Every Corvette Generation Compared by the Specs That Matter
Joe Kucinski
8 Coolest Corvette Pace Cars (and Replicas) of All Time
Verdad Gallardo
Top 10 Corvette Engines RANKED by Peak Torque (70+ Years of Muscle!)
Joe Kucinski
Corvette ZR1X Will Be Pacing the Indy 500, And Could Probably Race, Too!
Verdad Gallardo
Top 10 Corvettes Coming to Mecum Indy 2026!
Brett Foote
Le Mans Master
Joined: Jul 2007
Posts: 5,043
Likes: 8
From: Tampa Florida
Thread Starter
Advanced
Joined: May 2009
Posts: 58
Likes: 0
From: Pomona New York
So, I took some gas out of the tank, prior to that the Pump works the fuel filter works and all the relays are working. the fuel that i took out of the tank separated and was not looking to good, i think thats the problem bad fuel. the other problem is that the tank is almost full.
So i have to drain the tank and put some good gas in the car and I hope it fires up
So i have to drain the tank and put some good gas in the car and I hope it fires up
Thread Starter
Advanced
Joined: May 2009
Posts: 58
Likes: 0
From: Pomona New York
So I changed the gas hooked everything back up and still no start, if I dont have fuel pressure does that mean i have to change out the Injectors, Summer is here and i cant wait to drive.....thanks for the help
Drifting
Joined: Jun 2002
Posts: 1,945
Likes: 41
From: Corinth TX
I would venture to say that if you have no fuel pressure you have a bad fuel pump. And if you have as much water/stuff in the gas that you looked at, you might want to pull the injectors while you are at it since you have no fuel pressure anyways.
Last edited by NocarbutaVetteforme; Jun 27, 2009 at 10:03 PM.
Racer
Joined: Jan 2007
Posts: 274
Likes: 0
From: Muskogee OK
You might check your relay before dropping change on a pump.
Correct me if I'm wrong, but can't you run the fuel pump on an '86 by jumping A to G on the ALDL? If this is correct, try this and see if you have pressure.
Correct me if I'm wrong, but can't you run the fuel pump on an '86 by jumping A to G on the ALDL? If this is correct, try this and see if you have pressure.
Thread Starter
Advanced
Joined: May 2009
Posts: 58
Likes: 0
From: Pomona New York
I just replaced the fuel pump 2 weeks ago and it does turn on for 2or3 second when key is turned. So I guess I have to yank the injectors. Any sugestions where to buy.
Thanks for the advise
Thanks for the advise
Drifting
Joined: Jun 2002
Posts: 1,945
Likes: 41
From: Corinth TX
I would say that 2 of the best places to get your injectors are from:
1. http://fuelinjectorconnection.com/shop/
2. racetronix
Both are very good sources for injectors. I am a firm believer in Racetronix fuel pumps. Mine works great.
1. http://fuelinjectorconnection.com/shop/
2. racetronix
Both are very good sources for injectors. I am a firm believer in Racetronix fuel pumps. Mine works great.
