Fuel Pressure or lack of.........
11-02-2011, 11:14 AM
#1
Racer
Thread Starter
Fuel Pressure or lack of.........
i installed a fuel pressure gauge about a week ago and i noticed that my pressure does not hold over night by the next morning it is at 0 again. is this normal or should it be holding pressure i have changed the pump, filter, regulator and injector seals so if it is supposed to hold pressure i have a feeling its my fuel lines that should be changed out be for i go up in a fiery blaze
any info is good info
any info is good info
11-02-2011, 11:22 AM
#2
Got Nothin'
Rennlist Member
Rennlist Member
How does it start in the morning?
I believe there should be some pressure. You could have a leaky injector, not just the seals, but the injector itself.
I believe there should be some pressure. You could have a leaky injector, not just the seals, but the injector itself.
11-02-2011, 06:51 PM
#3
Racer
Join Date: Oct 2010
Location: Easton, MD
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When I did my recent tests neither the manual nor Clarks addresses anything more than the 20 minute leakdown. Mine passed the 20 minute test but by the looks of it the pressure would surely be 0 by morning. I also found 2-3 leaky injectors and I'm replacing all 4 this week. I'll test it again afterwards and leave it overnight just to give you some idea. Otherwise, if yours starts fine and passes the 20 minute test, I wouldn't spend a lot of time wracking your brain to figure it out.
11-02-2011, 09:14 PM
#4
Rennlist Member
It is correct. The pressure slowly goes down to zero after you turn the car off.
When running mine stays around 40 but after shutdown it is very slow but in the morning it will be at zero.
When running mine stays around 40 but after shutdown it is very slow but in the morning it will be at zero.
11-02-2011, 10:22 PM
#5
Racer
Thread Starter
ill do the 20min. test, plus ill pull my plugs and make sure they look even.......if all is well then i just learned something new about the car..... i have turbo injectors that i need to make piggyback for before i can use them
11-03-2011, 08:47 AM
#7
Racer
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Reading them might not point to bad fuel injectors. An injector has to be pretty bad to soil a plug, but just a little drippy to cause leakdown and rough idle. What I'm saying is that I had a good leakdown, plugs looked good, 2 injectors were dripping when I pulled the rail to change o-rings.
If you're happy with the idle/running and pass the leakdown, move on as ArticSteve put it!
If you're happy with the idle/running and pass the leakdown, move on as ArticSteve put it!
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11-03-2011, 06:39 PM
#8
Racer
Thread Starter
idle seems fine but the new cam makes it alittle harder to tell
screw it no biggy i need to start working on my other baby. i left her aside for over a year now, damn DMV/870 carb
screw it no biggy i need to start working on my other baby. i left her aside for over a year now, damn DMV/870 carb