I need help with FP problem!!

bobtodd · 06-01-2003, 01:37 PM

I have had my car stored over the last sixth months. One of thing frist things I did this spring before starting it up was install a Kirban fuel pressure regulator. Well, I start the car up and the fuel pressure takes forever to get up to where its supposed to be....like it's slowly building up. Also, whenever I rev the car up the fuel pressure gauge needle doesnt move. The gauge basically doesnt move at all when I drive it either. You can see very tiny fluctuations in the needle but nothing big. The guage is an Auto Meter and I just put it on last year. I have no clue what to do. Could something be clogging my fuel up since it had been sitting all winter? I had a half a tank of gas in it through the winter and I added another five gallons of racing fuel in it before I started it up so there is some good gas in it.
The gauge shows that the fuel pressure holds steady after the car is turned off..no leak down.
I changed the fuel filter last summer. Could the fuel pump sock possibly be clogged?
If anyone has had a problem like this please let me know!! I may try putting the stock regulator back on to see if that does anything different. Thanks for the help!

ArtMan · 06-02-2003, 12:04 PM

Are you sure it isn't your fuel pressure gauge?
How does the car run? If your not geeting the right pressure as the guage seems to indicate the engine should show some symptoms.

Dark_5.0 · 06-02-2003, 12:23 PM

It sounds like you dont have a vacuum hose hooked to the regulator to me.

If a vacuum isnt put on the regulator the pressure wont move.

bobtodd · 06-02-2003, 07:15 PM

I'm getting 6 inches of vacuum. All vacuum lines are connected and dont show signs of leaking. The vacuum line is on the regulator. When I pull the line off and on the fuel pressure doesnt change much. The car feels doggy. I dont want to get on it too much because I dont want to run lean at all...the fuel pressure doesnt go up when I gun it.
I am going to try and spray some carb cleaner around the intake and see if that does something.

jimberg · 06-02-2003, 10:35 PM

Use a diagnostic fuel pressure gauge and see what it does. Read the Tuning thread to see how to force the fuel pump to run without starting your engine. You just jumper the fuel pump test lead to ground when the key is in the on position. This is the best way to set your fuel pressure.

06-01-2003, 01:37 PM	#1
bobtodd Registered Member Join Date: Dec 1998 Location: WI, U.S Posts: 255	I need help with FP problem!! I have had my car stored over the last sixth months. One of thing frist things I did this spring before starting it up was install a Kirban fuel pressure regulator. Well, I start the car up and the fuel pressure takes forever to get up to where its supposed to be....like it's slowly building up. Also, whenever I rev the car up the fuel pressure gauge needle doesnt move. The gauge basically doesnt move at all when I drive it either. You can see very tiny fluctuations in the needle but nothing big. The guage is an Auto Meter and I just put it on last year. I have no clue what to do. Could something be clogging my fuel up since it had been sitting all winter? I had a half a tank of gas in it through the winter and I added another five gallons of racing fuel in it before I started it up so there is some good gas in it. The gauge shows that the fuel pressure holds steady after the car is turned off..no leak down. I changed the fuel filter last summer. Could the fuel pump sock possibly be clogged? If anyone has had a problem like this please let me know!! I may try putting the stock regulator back on to see if that does anything different. Thanks for the help! __________________ 91 LX - 10.5:1 pistons, ported 289 heads, Ultradyne 588 cam, Cobra upper/lower, MSD, JBA long tube headers, Flowmaster, Richmond 4:10, roll cage, monster tach...FUN!! 95 SHO - K&N filter

06-02-2003, 12:04 PM	#2
ArtMan Registered Member Join Date: Dec 1998 Location: Scarsdale, NY Posts: 45	Other Approach Are you sure it isn't your fuel pressure gauge? How does the car run? If your not geeting the right pressure as the guage seems to indicate the engine should show some symptoms. __________________ See my stang in the "Users Rides" section. Rice Hater's Club Member #225

06-02-2003, 12:23 PM	#3
Dark_5.0 Registered Member Join Date: Apr 2001 Location: Staging lane Posts: 4,337	It sounds like you dont have a vacuum hose hooked to the regulator to me. If a vacuum isnt put on the regulator the pressure wont move. __________________ 92' LX-Big brakes, Lots and lots of suspension, GT40X heads, Ported cobra intake, stock cam, Vortech SC trim. 00' Lightning-Stock 88'CRX-13 second ego killer

06-02-2003, 07:15 PM	#4
bobtodd Registered Member Join Date: Dec 1998 Location: WI, U.S Posts: 255	I'm getting 6 inches of vacuum. All vacuum lines are connected and dont show signs of leaking. The vacuum line is on the regulator. When I pull the line off and on the fuel pressure doesnt change much. The car feels doggy. I dont want to get on it too much because I dont want to run lean at all...the fuel pressure doesnt go up when I gun it. I am going to try and spray some carb cleaner around the intake and see if that does something. __________________ 91 LX - 10.5:1 pistons, ported 289 heads, Ultradyne 588 cam, Cobra upper/lower, MSD, JBA long tube headers, Flowmaster, Richmond 4:10, roll cage, monster tach...FUN!! 95 SHO - K&N filter

06-02-2003, 10:35 PM	#5
jimberg Registered Member Join Date: Oct 1998 Location: Rogers, MN Posts: 2,089	Use a diagnostic fuel pressure gauge and see what it does. Read the Tuning thread to see how to force the fuel pump to run without starting your engine. You just jumper the fuel pump test lead to ground when the key is in the on position. This is the best way to set your fuel pressure. __________________ 351W 89 Mustang GT Convertible

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