Fuel Pressure Question
Pro
Joined: Nov 2005
Posts: 602
Likes: 0
From: North Bay Ontario
Leaks at the engine foul the plus; effect A/F ratio, confuses the 02s.
Rather than guess or rely on opinions, ECKLERS Page 94 long hose FP Gauge $49.99 and see for yourself. www.ecklers.com 1-800-327-4868.
Testing always best.
Jake
Rather than guess or rely on opinions, ECKLERS Page 94 long hose FP Gauge $49.99 and see for yourself. www.ecklers.com 1-800-327-4868.
Testing always best.
Jake
Thread Starter
Tech Contributor
Joined: Oct 2008
Posts: 3,729
Likes: 190
From: Custer, WI
Ordered an adjustable regulator and diaphragm from TPiS. They are out of diaphragms but are expecting more to come in on Wednesday, which means I won't get it until Friday.
Wonderful.
Wonderful.
Le Mans Master
Joined: Feb 2000
Posts: 9,715
Likes: 27
From: Kempner Texas
Ahh...perhaps I wasn't clear - I've done all the diagnositics as per the FSM using a fuel pressure guage and pinching the lines - the FP loss is definitely located at the FPR. I have a brand new diaphram installed and pinching the return line at the tank results in pressure holding steady.
Jake
Race Director
Joined: Jun 2004
Posts: 13,960
Likes: 707
From: WI
When it's not there Friday, call and it might get shipped then. They are difficult to do business with. Several times this has happened to me. They will say it will ship that day and it doesn't then takes two weeks to get here when I'm one day shipping. They don't call you back either. Clay said "I'll definitely call you back", but of course he did not. I won't order from them anymore.
Thread Starter
Tech Contributor
Joined: Oct 2008
Posts: 3,729
Likes: 190
From: Custer, WI
When it's not there Friday, call and it might get shipped then. They are difficult to do business with. Several times this has happened to me. They will say it will ship that day and it doesn't then takes two weeks to get here when I'm one day shipping. They don't call you back either. Clay said "I'll definitely call you back", but of course he did not. I won't order from them anymore.
I hope they don't pull that crap with me. At least they called me and told me that they were out of diaphragms instead of just not shipping it for a while.
Intermediate
Joined: Jan 2013
Posts: 45
Likes: 0
fuel pressure for 1987 corvette
When I bought my 1987 corvette I noticed it had a Jet adjustable fuel pressure regulator. When fuel pressure was checked with gauge it bounced between 60 and 40 pounds at idle. Is this a problem or is this normal with an adjustable fuel pressure regulator? Thanks
Last edited by kocoach; Mar 22, 2013 at 01:06 AM. Reason: wasn't complete
Drifting
Joined: Nov 2009
Posts: 1,341
Likes: 2
From: Perth Western Australia
St. Jude Donor '10
Should be steady at 40 I would have thought.
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Instructor
Joined: Sep 2012
Posts: 218
Likes: 1
From: Salem New Hampshire
Just what should be the acceptable fuel pressure be for a 1985 corvette 350ci t p I ?
I have been told that 50 lbs is the accepted range and have had issues with a lower 35 lbs of pressure eg stalling at slower speeds after running for 30-45 minutes of higher speeds...what do you think?
I have been told that 50 lbs is the accepted range and have had issues with a lower 35 lbs of pressure eg stalling at slower speeds after running for 30-45 minutes of higher speeds...what do you think?
Melting Slicks
Joined: Feb 2005
Posts: 2,057
Likes: 5
From: Bay Shore, NY
Just what should be the acceptable fuel pressure be for a 1985 corvette 350ci t p I ?
I have been told that 50 lbs is the accepted range and have had issues with a lower 35 lbs of pressure eg stalling at slower speeds after running for 30-45 minutes of higher speeds...what do you think?
I have been told that 50 lbs is the accepted range and have had issues with a lower 35 lbs of pressure eg stalling at slower speeds after running for 30-45 minutes of higher speeds...what do you think?
Racer
Joined: Nov 2008
Posts: 321
Likes: 2
From: Auburndale FL
I am having similar issue on my 87. I have two new fpr's and both seem to allow fuel to leak to the top. I am curious should we be using silicon sealant with these as I think the fuel is leaking up the screws to the top of the diaphragm and ending up in the intake via the vacuum line?
Anybody have concerns with using silicon to seal the mating surface to the diaphragm?
Thanks in advance.
Anybody have concerns with using silicon to seal the mating surface to the diaphragm?
Thanks in advance.
Burning Brakes
Joined: May 2013
Posts: 768
Likes: 24
From: Valrico Florida
Melting Slicks
Joined: Feb 2005
Posts: 2,057
Likes: 5
From: Bay Shore, NY
Connect a fuel pressure gauge to the schraeder valve in the fuel rail. Turn the key to run and pressurize the system. No need to start the car. Check the reading on the gauge and see if it stays steady or starts to bleed down. If it seems to be staying steady, leave it connected for a bit and see if the pressure bleeds off. I've left the gauge on overnight after replacing the fuel pump to verify that my fuel pressure problem was solved. It will naturally bleed off but it should take more than an hour, at least that's how it is with my car.
Instructor
Joined: Sep 2012
Posts: 218
Likes: 1
From: Salem New Hampshire
A friend on mine was saying that I should check my vacuum line pressure..it seems to have problems once the car has run a while and maybe a line might have a leak only after of expanding and not holding the vacuum...what is your take on this?
Mike
Mike
