C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

""Fuel Filter & Injectors""

Thread Tools
 
Search this Thread
 
Old Aug 10, 2004 | 08:19 PM
  #1  
chillcat's Avatar
chillcat
Thread Starter
Drifting
 
Joined: Apr 2004
Posts: 1,453
Likes: 0
From: crystalriver Florida
Default ""Fuel Filter & Injectors""

I have a simple question, where is the fuel filter located at on my 85? And another question is, is it easy to change out the fuel injectors. I had my entire intake polished and it didn't look like an easy job, how do those injectors come out, do they just pop in with suction or are they held down by the fuel rail ? One more question--I possibly have to replace the injectors--what size should I go with to match my new performance--heres what I have, Ram Air(front plate), hypertechthermo master chip, no smog pump, no cat, headers, helix 1inch spacer between throttlebody. Just a stock throttle. Thanks
Reply
Old Aug 10, 2004 | 11:49 PM
  #2  
96zride's Avatar
96zride
Burning Brakes
 
Joined: May 2004
Posts: 816
Likes: 0
From: Bremerton Wa
St. Jude Donor '04 &'05
Default

On my 91 the fuel filter is on the passenger side in front the door follow the fuel line, it will bend up and you will see it on the frame rail there will be a heat shield around it. There should be 2 10mm bolts holding the shield. I think the fuel filter nuts were 17 mm but don't qoute me on that. I would think injectors are not that hard. I think you might have to pull the upper plenum and runners to get the fuel rails out.
Reply
Old Aug 10, 2004 | 11:56 PM
  #3  
jabez's Avatar
jabez
Race Director
15 Year Member
 
Joined: Apr 2004
Posts: 17,066
Likes: 3
From: Milpitas ca
Default

http://www.witchhunter.com/lt1injectorreplace2.htm

This might help a bit
Reply
Old Aug 11, 2004 | 12:13 AM
  #4  
John A. Marker's Avatar
John A. Marker
Le Mans Master
15 Year Member
 
Joined: Mar 2004
Posts: 5,107
Likes: 171
From: Dublin CA
Default

As 96zride indicated, the filter is on the passanger side bolted to the frame rail with one bolt (I believe) in the strap which holds the filter in place. I replace mine every 10,000 miles. To do this jack up the car and place on stands. Start the car and pull the fuel pump fuse (panel is on right side of dash when you open right door). The engine will stall out from lack of fuel. This releases the pressure in the system. Unscrew the fittings to the fuel filter and pull the filter. There may be some fuel loss even with the pressure released. Make sure you install the filterthe correct way, filter is usually marked with an arrow showing direction of fuel flow. Tighten everything back up. Install the fuse. Start the engine and check for any leaks. Your done!

The injectors for a 85 stock is 24 pound. I replaced mine recently with Accel without a problem. You should check Summit or Jegs for costs on the Accel if that is the direction you want to go. The Ford injectors are rated lower than actual. So a 24# will actually flow higher....not sure if you are looking at 2-4 pounds more. Suggest that you install an adjustable fuel pressure regulator when you change injectors. **JUST BE SURE to label every hose and wire when you start to take things down. A few pictures help also. This is not a difficult job to replace the injectors. They push into the hole in the intake and are held in place with a "O" ring. Be sure to put oil on the ring to help it slide in place. The injectors are held into the fuel rail with a "C" clip that rotatesto lock or unlock the injector in place. There is also a "O" ring on the upper part of the injector that slips into the fuel rail. Put it all back together, start engine and check for fuel leaks. You will probably want to reset idle. I found that my idle jumped 200 RPM with the new injectors since I was getting better fuel flow. MPG also increased. Just take your time and all will be okay.
Reply
Old Aug 11, 2004 | 02:01 AM
  #5  
mikey whipreck's Avatar
mikey whipreck
Melting Slicks
15 Year Member
 
Joined: Jun 2004
Posts: 3,032
Likes: 4
Default

I have an 85- you dont even need to jack the car up, you should be able to get to it fine, I did. Just make sure all the power is off, and that you have released the fuel pressure. your filter is located on the passenger side just behind the wheel, and to the right of the starter.
Reply
Old Aug 11, 2004 | 02:49 AM
  #6  
JrRifleCoach's Avatar
JrRifleCoach
Team Owner
20 Year Member
Veteran: Navy
St. Jude 20 Year Donor
Liked
 
Joined: Sep 2003
Posts: 20,179
Likes: 673
From: Freedom is never more than one generation away from extinction.
St. Jude '03 thru '24
Default

Originally Posted by mikey whipreck
I have an 85- you dont even need to jack the car up, you should be able to get to it fine, I did.
So did you install a liftkit or sumthin?
Reply
Old Aug 11, 2004 | 07:54 AM
  #7  
Steel Blue 91's Avatar
Steel Blue 91
Le Mans Master
15 Year Member
Veteran: Air Force
 
Joined: Jul 2002
Posts: 5,818
Likes: 2
From: Alive and well in Burlington NC
Default

One other item on the filter change. It's a good idea to remove the gas cap after the engine dies from fuel starvation. That will release the last of the pressure.
Reply
Old Aug 11, 2004 | 06:37 PM
  #8  
chillcat's Avatar
chillcat
Thread Starter
Drifting
 
Joined: Apr 2004
Posts: 1,453
Likes: 0
From: crystalriver Florida
Default

Ok cool...thanks guys, this don't sound tough at all...I have the greenwood parts, so jacking it up is out of the question, I'll have to figure out how to lift it a different way....
Reply

Get notified of new replies

To ""Fuel Filter & Injectors""

Corvette Stories

The Best of Corvette for Corvette Enthusiasts

story-0

10 Ugly Corvettes That We Still Kinda Love

 Joe Kucinski
story-1

Top 10 Most Expensive Corvettes Ever Sold on Bring A Trailer

 Brett Foote
story-2

10 Things Every Corvette Owner Needs (2026 Edition)

 Michael S. Palmer
story-3

8 Most "Only Corvette Owners Understand" Quirks and Problems

 Pouria Savadkouei
story-4

10 Reasons the C6 Z06 is Still A Performance Benchmark After 20 Years

 Joe Kucinski
story-5

How Much Horsepower Every Corvette Engine "LOST" in 1972

 Joe Kucinski
story-6

Top 10 DOs and DON'Ts for Protecting Your Convertible Top!

 Michael S. Palmer
story-7

Top 10 Most Explosive Corvettes Ever Made: Power-to-Weight Ratio Ranked!

 Joe Kucinski
story-8

150 hp to 1,250 hp: Every Corvette Generation Compared by the Specs That Matter

 Joe Kucinski
story-9

8 Coolest Corvette Pace Cars (and Replicas) of All Time

 Verdad Gallardo




All times are GMT -4. The time now is 12:53 PM.

story-0
10 Ugly Corvettes That We Still Kinda Love

Slideshow: 10 ugly Corvettes that we still kinda love.

By Joe Kucinski | 2026-06-03 10:34:17


VIEW MORE
story-1
Top 10 Most Expensive Corvettes Ever Sold on Bring A Trailer

A lot of money has changed hands at the online auction house over the years.

By Brett Foote | 2026-06-03 10:21:50


VIEW MORE
story-2
10 Things Every Corvette Owner Needs (2026 Edition)

Slideshow: 10 great gifts Corvette enthusiasts actually want for Father's Day!

By Michael S. Palmer | 2026-06-03 15:43:40


VIEW MORE
story-3
8 Most "Only Corvette Owners Understand" Quirks and Problems

Slideshow: These are the quirks, annoyances, and oddly lovable problems that every Corvette owner eventually learns to live with.

By Pouria Savadkouei | 2026-05-28 09:31:39


VIEW MORE
story-4
10 Reasons the C6 Z06 is Still A Performance Benchmark After 20 Years

Slideshow: 10 reasons why the C6 Z06 is still a performance benchmark after 20 years.

By Joe Kucinski | 2026-05-27 17:20:09


VIEW MORE
story-5
How Much Horsepower Every Corvette Engine "LOST" in 1972

Slideshow: How much horsepower every Corvette engine lost in 1972.

By Joe Kucinski | 2026-05-27 16:54:53


VIEW MORE
story-6
Top 10 DOs and DON'Ts for Protecting Your Convertible Top!

Slideshow: How to Protect A Convertible Top: 10 DOs & DON'Ts

By Michael S. Palmer | 2026-04-03 00:00:00


VIEW MORE
story-7
Top 10 Most Explosive Corvettes Ever Made: Power-to-Weight Ratio Ranked!

Slideshow: The 10 most explosive Corvettes ever built based on power-to-weight ratio.

By Joe Kucinski | 2026-05-20 07:23:03


VIEW MORE
story-8
150 hp to 1,250 hp: Every Corvette Generation Compared by the Specs That Matter

Slideshow: From C1 to C8 we compare every Corvette generation by the numbers.

By Joe Kucinski | 2026-05-12 16:54:12


VIEW MORE
story-9
8 Coolest Corvette Pace Cars (and Replicas) of All Time

Slideshow: Some Corvette pace cars became collectible legends, while others perfectly captured the look and attitude of their era.

By Verdad Gallardo | 2026-05-11 09:50:51


VIEW MORE