How long should a fuel rail hold pressure? (after the initial 20 minutes)
09-29-2000, 09:25 PM
#1
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Car: 1989 Camaro-1LE
Engine: TPI(s)
Transmission: 5 speed (MM5, MK6)
Axle/Gears: 3.45, 3.73
How long should a fuel rail hold pressure? (after the initial 20 minutes)
I know the leak down procedure and such.
How long should a fuel rail hold pressure, like 5psi or better?
1 day? 2 days? Really long?
I know I have leaking injectors, but it's only been 2 days and the fuel rail has zero pressure. I took off the cold start injector and did not even get a drip. Man, my injectors must really be leaking.
Just curious.
Mark.
How long should a fuel rail hold pressure, like 5psi or better?
1 day? 2 days? Really long?
I know I have leaking injectors, but it's only been 2 days and the fuel rail has zero pressure. I took off the cold start injector and did not even get a drip. Man, my injectors must really be leaking.
Just curious.
Mark.
09-30-2000, 02:19 PM
#2
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fuel rail should hole pressure overnight,, so at least 10 hours..
DO THIS : pull your dipstick,, does it smell like gas?, and is the level higher that usual?.. if so then the injectors are leaking.. if not,, then i would assume that the fuel is returning back into the tank,, which could mean bad fuel pump.
is your car running rich???
DO THIS : pull your dipstick,, does it smell like gas?, and is the level higher that usual?.. if so then the injectors are leaking.. if not,, then i would assume that the fuel is returning back into the tank,, which could mean bad fuel pump.
is your car running rich???
09-30-2000, 07:27 PM
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Car: Take
Engine: Your
Transmission: Pick
For the fisrt half hour, your pressure should not drop at all. After that, you may loose a psi or two every hour, and it is normal. I wouldn't be worried if it doesn't hold overnight. But you should have FULL pressure after a half hour.
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ASE Master Tech + L1
Savannah, GA
'87 Trans Am-K&N,Cold air induction, SSM SFC, Boxed LCAs, 8mm Accel wires, Flowmaster, 16" GTA rims.
'97 Bonneville SSE
09-30-2000, 11:17 PM
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10-01-2000, 02:08 PM
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Car: Take
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Transmission: Pick
It may be that the checkvalve in the fuel pump is bad. I wouldn't replace the pump just for that. As long as you aren't having any problems, don't worry about it.
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If you live in Southeastern US, check us out!
South East Thirdgen
"I used to have a handle on life, but then I used it as a plunger and broke it" -The Wave
ASE Master Tech + L1
Savannah, GA
'87 Trans Am-K&N,Cold air induction, SSM SFC, Boxed LCAs, 8mm Accel wires, Flowmaster, 16" GTA rims.
'97 Bonneville SSE
------------------
If you live in Southeastern US, check us out!
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"I used to have a handle on life, but then I used it as a plunger and broke it" -The Wave
ASE Master Tech + L1
Savannah, GA
'87 Trans Am-K&N,Cold air induction, SSM SFC, Boxed LCAs, 8mm Accel wires, Flowmaster, 16" GTA rims.
'97 Bonneville SSE
10-02-2000, 09:49 AM
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Car: '89 Pontiac Firebird
Engine: 5.7L
Transmission: 700R4
Axle/Gears: 10-bolt w/ 4.10 and Eaton Posi
I have a nick in my regulator housing under the regulator and the pressure bleeds off in less than 30 seconds.
The main reason for the system to hold pressure is for an immediate restart of the vehicle right after you shut it off.
I have had no problems with my vehicle... and it has been like that for 2 years now....
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Sportsman II 72 CC heads, Pete Jackson gear drive, Performance Resources chip, Edelbrock 1 5/8" headers and Edelbrock cat back exhaust, hi-flow cats, Trans-go stage 3 shift kit, Vigilante 9.5" 2800 stall convertor, SLP cold air induction, SLP roller camshaft, 24lb ADS injectors, AFPR, 3.45 rear end gears, and other goodies...
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The main reason for the system to hold pressure is for an immediate restart of the vehicle right after you shut it off.
I have had no problems with my vehicle... and it has been like that for 2 years now....
------------------
Sportsman II 72 CC heads, Pete Jackson gear drive, Performance Resources chip, Edelbrock 1 5/8" headers and Edelbrock cat back exhaust, hi-flow cats, Trans-go stage 3 shift kit, Vigilante 9.5" 2800 stall convertor, SLP cold air induction, SLP roller camshaft, 24lb ADS injectors, AFPR, 3.45 rear end gears, and other goodies...
http://members.aol.com/jwnolte/raven.htm
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