I have a 2002 mercury grand marquis and lately it has been not starting in the morning or when it does it spits and sputters and dies and then wont start. It usually takes about ten times to turn it over. I replaced the fuel pressure realy and it stopped doing it. Now 8 months later its doing it again. I replaced the same realy again but it only worked for about 3 weeks. I can here the fuel pump not kicking on every time. Not sure what the problem is

SOURCE: 1993 Mercury Grand Marquis

starter cylinoid

Marvin

• 85242 Answers
• Posted on Sep 04, 2008

SOURCE: 1989 mercury Grand Marquis fuel system

The fuel pump relay is under the hood in the MAXI fuse box, it is a black box with a huge wiring bundle comming out of it.

SOURCE: 2001 Mercury Grand Marquis hesitation and jolting from 35-45 mph

Sure, the more the throttle and the longer its open the more gas is being injected so if the spark is not there it will spotter. I think you have nothing to loose with an ignition tune-up. It'll be more economical than taking it to a mechanic and still ending up with the same problem. You should change the fuel filter also it could be clogged and there is'nt enough fuel delivered at these speeds. You can also try a fuel injector cleaning solution the kind you pour in the gas tank. This might work for you.

SOURCE: Fuel issue on 2001 Grand Marquis

most cars have an oil pressure sensor that is tied into the fuel system that will shut off fuel pump if oil pressure is low. Ford is famous for having a yellow fuel pump cut off switch that activates in a collision - you need to locate and check this 1st

Testimonial: "Oil pressure during cranking? This come off the sender switch? How to bypass to "test" if engine will start? "

SOURCE: I have a 96 Mercury

I have a 96 Grand Marquis with a similar problem. Also on the highway it would just conk out on me suddenly, almost felt like I was hitting the brakes, then it would pick up again. Eventually got to the point where it was stalling out on the highway and at red lights. One day it wouldn't start. Mechanic said the fuel filter was clogged solid. It has run well but every once in awhile still stalls out on me. From talking with other Grand Marquis owners and the mechanic the Mass Air Flow sensor may be to blame. He wanted to charge me $400 but I found the part online for about $85.