MustangWorks.com : Ford Forums - View Single Post - Fuel pressure question

Stang_ROTY · 05-21-2003, 07:06 AM

I think I understand what you're saying. Here's what I noticed yesterday. Prior to the engine starting, the pressure is 43 psi. The minute that I turned over the engine, the pressure dropped to 38 psi (engine was alreadyd hot). SO I can rule out a faulty pump at this point. I did recently change the vac hose that going from the adj. regulator to the manifold vac source...maybe that's the problem? Since the inlet on the regulator is smaller in diameter than the inlet on the manifold I was forced to put an adapter in the middle of two different sized vac hoses. I'm starting to see how this could possible be a problem.....

05-21-2003, 07:06 AM	#3
Stang_ROTY Registered Member Join Date: Feb 2001 Location: Berkshire County - Massachusetts Posts: 735	I think I understand what you're saying. Here's what I noticed yesterday. Prior to the engine starting, the pressure is 43 psi. The minute that I turned over the engine, the pressure dropped to 38 psi (engine was alreadyd hot). SO I can rule out a faulty pump at this point. I did recently change the vac hose that going from the adj. regulator to the manifold vac source...maybe that's the problem? Since the inlet on the regulator is smaller in diameter than the inlet on the manifold I was forced to put an adapter in the middle of two different sized vac hoses. I'm starting to see how this could possible be a problem..... __________________ Red 1993 GT Street Machine Best E.T. - 12.41/Best MPH = 108 Engine is a 1969 351 block w/393 stroker kit. Dynamic Roller Myte C4, 8 pt cage. Edlebrock Performer heads and Victor Jr. EFI, FRPP 30lb injectors & Cartech fuel system. MSD ignition. Sothside Machine bars & Sub-frames, adj. upper's, 3.73's, Koni rear shocks, much more