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2004 ford f650 7.2 caterpillar wont start after warming up cranks good before warming up

After filling with fuel sometimes it kills on hwy at least once squirt a shot of starting fluid cranks ups up

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Posted on Jan 02, 2017

  • 12 Answers


Maybe you have a faulty fuel pump, but first is there gas in the tank? How do you know? Has your fuel guage failed? If you have added fuel recently, have you traveled far enough to burn all the fuel? You'd be surprised how often I find faulty fuel guages after spending too much time trying to diagnose a no-start suspected fuel delivery problem. If you have ANY doubt, please add 1 gallon of fuel to the tank. Now turn the key to the run position, DO NOT TRY TO START THE ENGINE! The pump should run for about 30 seconds to prime the fuel system. You should be able to hear it running in a quiet environment, but you can stick a funnel in the fuel fill inlet and listen while an assistant turns the key to the run position. (Have them shut the driver's door, the Ford Key in ingition alert chime is so loud it may prevent you from hearing the pump run) If you can hear the pump run, and you get no fuel, it's time to check the in line fuel filter that no one ever seems to get around to changing! BE CAREFUL THOUGH BECAUSE IF THE PUMP RAN, YOU JUST PRESSURIZED THE FUEL SYSTEM, AND HIGH PRESSURE FUEL SPRAY WILL GREET YOU WHEN YOU TRY TO SERVICE THE IN LINE FILTER. Also, if you've never replaced one of these Ford in line fuel filters, you will discover a retainer that will have to be dealt with for filter removal. If yours is an all-steel coupler, you will need a fuel line disconnect tool to disassemble this connection. DO NOT TRY TO DISCONNECT IT WITHOUT THAT TOOL, or you will get to enjoy the fun of replacing the entire line when you damage the coupler. If your coupler is plastic, it also has a removal plastic retainer. Make sure your new filter includes the retainer clips, they are horse-shoe shaped plastic clips. Once you see the replacements, you'll recognize what you should be looking for. Once you verify that you have two new clips, you can break the old ones to remove them, be careful NOT TO DAMAGE the couple on the line. If your pump didn't run, you'll probably need to replace it. If you don't know how to remove and replace a fuel tank, and if you don't possess the proper fuel module retainer wrench, and if you're not sure how many hoses, lines, sensors, or elecrtical connectors need to be removed, now might be a good time to seek professional assistance. BEWARE! Most mechanics won't accept a job you have started, but can not complete! They call those "basket cases" because most people bring in the removed components in some kind of basket. I always charge extra on "Basket Cases" but only if you're persuasive enough to convince me to accept the job! Long story short... Listen for the pump to run during the prime interval, if it doesn't, you can check the fuel pump relay, and the inertial switch. Usually these Ford inertial switches on Tauruses are in the trunk on the Driver's side close to the trunk lid hinge, they will pop-out kind of like a circuit breaker upon an impact with the vehicle. It's there to interrupt the fuel pump in the event of an accident. They can also be tripped by a severe chuck-hole encounter, a tow truck ride, or other various sorts of impacts. Remember, it's not a good idea to try to handle a full fuel tank without the proper equipment and training, it's not much fun with a half full tank either so be extremely careful! DO NOT EVER ATTEMPT TO WORK UNDERNEATH A VEHICLE WITHOUT SAFETY STANDS PROPERLY SUPPORTING THE VEHICLE IN A PROVEN STABLE CONDITION! Once raised and supported you must try to physically knock the vehicle off the stands to prove that it's in a stable condition BEFORE ANYONE EVER GETS UNDERNEATH IT!
This procedure involves life threatening dangers including fire hazards, explosion hazards, and danger associated with being crushed by the vehicle! ONLY PROFESSIONAL PERSONNEL should attempt to perform these dangerous services. If you ignore these warnings, you do so at your own risk!

Posted on Nov 03, 2008

  • 14036 Answers

SOURCE: I have a 97 gmc sierra w/ 5.7 l engine that won't start

replace fuel filter.check fuel pressure.

Posted on Jul 18, 2009

  • 1 Answer

SOURCE: BMW E46 320d SE 2002 Poor starting from cold, OK when warm.

rub your **** on the key fob

Posted on Jul 22, 2009

  • 432 Answers

SOURCE: 1996 Chevy 5.7 1500 van will not start

Dont ever spray strting fluid in a gas engine you can ruin the rings.MAF is probably bad.

Posted on Sep 24, 2009

  • 1 Answer

SOURCE: honda fourtrax

Where is the cdi box located??

Posted on Oct 27, 2009

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