Question about Ford F-150

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My flex fuel Fors f150 7700 series won't stay running when I switch it over to propane

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Presuming you have fuel in the tank, you need to check fuel pressure. Or first physically check you do not have pinched fuel line and fuel filter is new for propane as well as propane pump is working correctly.

Posted on Dec 18, 2014

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Posted on Jan 02, 2017

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randyprevost
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SOURCE: 1993 Excel no start

Please mark this as solved, or explain it properly.

Posted on Nov 02, 2012

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SOURCE: truck won't stay Running replaced fuel pump already has plenty of fuel pressure truck will crank but won't stay running

Check the crank case sensor

Posted on Mar 09, 2013

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1 Answer

Truck runs on propane does not start


Are you familiar with the propane injection system? If so can you tell me what tests you have run so far and what was inspected? Do you have a fuel type selector switch (to choose between Gas and Propane)?When did this problem start and what is the temperature outside? Propane will not convert from liquid to vapor fast enough, if it is too cold outside. Inspect the plumbing between the intake and the regulator. If there is a leak in the plumbing. The diaphragm inside the regulator will not move or open (to let propane flow to the engine). The regulator can malfunction if it becomes clogged with sludge from the propane. They sell a product that can be added to the propane tank. It is used to keep the fuel system clean. Please write back. If you have more details or information I would like to help. Good luck.

Dec 29, 2013 | Cars & Trucks

1 Answer

Starts but won't stay running


Did you changed fuel filter.

May 11, 2013 | Cars & Trucks

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My 94 fors Taurus cuts out while driving and sometimes will not start. It cranks but won't start. We changed the fuel pump, spark plugs and distributor cap, but it is still cutting out while driving...


are there any codes? have you checked the pressure in the fuel line. you may have a bad fuel pressure regulator. or a bad crank position sensor. spray starter in the throttle body and see if it starts

Dec 14, 2012 | Cars & Trucks

1 Answer

1993 Excel no start


Please mark this as solved, or explain it properly.

Sep 27, 2012 | Hyundai Excel Cars & Trucks

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Know 2001Saturn ran out of has, was getting fuel,but it started with starter spray but won't stay running,battery is almost fully dead ,could that be why I am now not getting any fuel


no as long as its running the alternator will suply electric with it running out of fuel the pump and filter would have pulled all the muck from inside the tank put plenty of fuel in maybe quarter of a tanks charge battery after a few days it should be ok but if not get fuel filter changed hope this helps ivan

Sep 26, 2012 | 2001 Saturn L-Series

1 Answer

98 Expedition..5.4L 4WD..coded bank 1 bank 2....O2 sensors..LEAN....replaced both..no change..still same codes..now it won't stay running. Tried to code again..won't run long enough to get a c


Really sounds like a vacuum leak. Lean code could still be accurate. Screaming idle usually means air is getting into engine. Ruptured EGR diaphragm would vent air. Brake booster could vent air. A lot of air will show lean mix.

You may have to use different methods to test vacuum. Some use vacuum gauge to test egr and lines which dead end into solenoids. Other tests use water spray or propane gas to draw in and change rpm. You are at a disadvantage if engine does not run.

Crankshaft sensor helps set fuel volume for given rpm. Might not be counting all the rpm's, but would not account for fast idle.

Aug 06, 2017 | 1998 Ford Expedition

2 Answers

I have a 1994 Ford F150 XLT with duel fuel tanks! I have a full tank in the front tank, but when hit the switch for that tank, the truck goes dead! What is the cause of this?


common on older high mileage fors to either have the switch go out or the intank pump go bad, you cang ground terminal 6 on the underhood diag plug with key on engine off and switch from front to rear or vice versa and listen for fuel pumps to be running, likely one is not

Nov 12, 2010 | 1994 Ford F150 Styleside Supercab

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