It was taking 2 or 3 trys to start and it would barely move on a cold start (I had to pump the gas peddle to get it going) unless it warmed up for 5+ mins.I changed the fuel filter and now it starts 1st try and runs a little better on cold starts but when I drive 75mph up a steep long hill(normally the car flys up hill) it sudenly looses power. If I floor it the car lunges and still looses power and speed drops to 45-60mph before I get power back then it takes off. Is it my fuel pump going out or something else? Thank you
loosing fuel pressure when I dont let the car warm up or when I go up hill at 60+ mph on 1994 Ford Crown Victoria
by Visitor in Orem, UT on January 03, 2011
ANSWER by delane 72 garage and body shop on January 03, 2011
ck fuel pressure with a gage
ANSWER by Brian Glastetter on January 03, 2011
Typically, we do not see Ford fuel pumps doing what you describe- they usually do not start if they are failing. Of course, driving it under a load with a fuel pressure gauge is one of the first things we would do, but I would venture that you are experiencing a lean fuel mixture most probably due to a intermitting failing sensor such as the mass air flow sensor. Do not throw parts at it. Have a shop diagnose it if you do not have the equipment. Guessing usually proves to be more expensive than a proper diagnosis.
ANSWER by backyard tech on January 03, 2011
You have a bad fuel pump. If you do manage to check fuel pressure, Make sure you have volume also.
ANSWER by DaveJHM on January 03, 2011
I agree with b-glaste, but I also think you could have a bleed down problem at times causing poor pressure consistency. We're talking a 1994 unit here, all bets are off when it comes to fuel pump quality in the Trotman - Nasser era... I'm thinking to check for an exhaust restriction, perhaps intermittent, also. Do the fuel pressure test first, then check for an exhaust restriction. Best of luck.