Why do I have high fuel pressure...

[patrickt]

Originally Posted by steve meltzer

Any other thoughts? thanx steve

How is your gauge plumbed in to your fuel system? Meaning, is it all mechanical and you have an actual fuel line running to your dash gauge, or is there a pressure sensor there on the engine, either mechanical or electrical, etc. It can make a big difference because of the heat. For instance, my liquid filled pressure gauge, sitting about six inches away from the carb inlet, registers zero psi when the underhood temperature gets hot. Almost all do, unless they have a pressure release mechanism.

[steve meltzer]

All mechanical...at the end of the fuel log/rail there's liquid filled line that goes to the gauge.
(autometer). sa

[patrickt]

Originally Posted by steve meltzer

All mechanical...at the end of the fuel log/rail there's liquid filled line that goes to the gauge.
(autometer). sa

Do you feel like buying a new $100 mechanical fuel pump and just rolling the dice to see if the new pump makes everything better (without the need to turn on your electric pump)? I think that's probably what I would do. I just don't like leaving a part on the car that is not up to snuff. I don't know if it could actually leak much (either externally or internally) -- I drove a car for two years decades ago that dripped a drop of gas out of the fuel pump diaphragm every five or six seconds and nothing ever happened, other than poor gas mileage.

[steve meltzer]

When all's said and done, it would cost about $100 to buy the blocking plate and find the right aeroquip or equivalent way to connect the two fuel lines. What pump would you buy? Might even be easier, in some ways, to replace the mechanical pump than to figure out the re-plumb. thanx steve

[patrickt]

Originally Posted by steve meltzer

When all's said and done, it would cost about $100 to buy the blocking plate and find the right aeroquip or equivalent way to connect the two fuel lines. What pump would you buy? Might even be easier, in some ways, to replace the mechanical pump than to figure out the re-plumb. thanx steve

When I threw out a hundred bucks, I was thinking of this tried and true pump: https://www.summitracing.com/parts/CRT-M6905/ But, others might have other suggestions. And you should also expect somebody to complain about you having a fuel line running in to the dash without an isolator. I've never touched an isolator, so I won't comment on it.

[steve meltzer]

Thanx for the link. I have an isolator between the fuel log and the gauge. I'd be afeared to run gasoline into the cockpit...hate for my cigar to light it up. s

[steve meltzer]

Got out to the car this PM and despite kicking on the e-pump the pressure never got to be more than 3-4 PSI, the car started but died about 100' later. Couldn't restart and pressure remained at 3 with or without the e-pump. Cranked OK, but would never fire. I needed to get home, so my wife took me, leaving the car parked at work. Tomorrow I'll see if I have spark or fuel or whatever I can determine. Could the mechanical pump fail in such away that the e-pump can't bring fuel to the rail? Or, is this just another problem before I start cussing, swearing and throwing dangerous objects? thanx s