|View single post by edward_davis|
|Posted: 07-01-2006 07:04 pm||
|I have to agree with Mark's assessment. I had a similar problem that was a result of my old pump alternately having no pressure and too much pressure. I bought one of the new Facet pumps, a black Posi-flo pump rated for the lowest pressure, 1.5-4 psi. This pump is a lot quieter than the older brass-cube pumps; it only makes noise when it's priming, after I initially turn on the ignition. You can get this sort of pump at most auto parts stores, and they're relatively inexpensive.
The new pump made too much pressure anyway, so I installed an adjustible pressure regulator in the trunk. I agree with Mike, it would have been better to install it in the engine compartment; I had to use my pressure gauge to fine-tune the pressure regulator so that the pressure at the carbs was the appropriate amount, 2.5 psi. I actually had to set the regulator slightly higher than 2.5 for there to be enough pressure at the carbs - at 2.5 psi, the carbs were sucked dry by the engine.
My fuel system also has the bypass that Mark describes, but it wasn't enough to keep the carbs from flooding. Since I have an aftermarket aluminium tank, I'm not sure that it has the correct restrictor. I put my pressure regulator after the bypass and everyting works fine.
Here's a picture of my setup on JHPPG:
Here's the website for the Facet pumps:
I don't have any association with those folks, of course; I just got their pump to work in my car.
Be sure to check your oil for gasoline contamination after having the flooding problem.
Last edited on 07-01-2006 07:05 pm by edward_davis