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What are the signs of the fuel pump going out ?


No pressure measured on a gauge at the engine
Low pressure at the engine
Low volume from pump
Too much current draw from fuel pump motor
Bad pattern on oscilloscope of motor running
Pump seizes mechanically or electrically when driving,
then works again
Low fuel level & you ruin fuel pump
Check valve in pump drains down pressure
and hard to start after sitting

Feb 13, 2013 | 1990 Toyota Pickup

1 Answer

Ac pump stops


freon charge amount is low. as it is running it will trip the low pressure switch turning it off then when pressure equalizes back into the low side the switch enguages the pump again,then repeat. to fix add freon or get ac system serviced.

Jun 07, 2012 | 1997 Chevrolet Tahoe

2 Answers

1998 Mazda 626 will start great many times then suddenly won't start --- will have to turn the key multiple times for 2 to 5 minutes and then it will start again. A common time this will happen will...


Ah, you give many very good clues, all of which point to a problem with the fuel pump.
The cold/wet scenario - moisture getting into the contacts, possibly on/in the starter or fuel pump,
but the low fuel scenario points to the fuel pump. The fuel pump must work a little harder to pump
fuel when the level is low - it works harder to pressurize the fuel rail, and harder to supply fuel for
starting. A fuel pump that's starting to think about failing will struggle under these conditions.

May 29, 2011 | 1998 Mazda 626

1 Answer

Will not start put fuel in carb and started and turned off fuel pump is good think it might be pcm


CHECK FUEL PUMP PRESSURE. SHOULD BE 41 - 47 PSI. IF FUEL PRESSURE REAL LOW CHANGE FUEL FILTER.STILL LOW FUEL PUMP FAULTY. IF FUEL PUMP NOT RUNNING CHECK FUEL PUMP FUSE OR RELAY.IF ALL IS GOOD FUEL PUMP BAD. HAVE VECHICLE SCANNED WITH A SCANNER BEFORE BUYING NEW PARTS. LOOK FOR FUEL PUMP FAULT CODES AND PCM FAULT CODES.

Dec 26, 2010 | 1999 Oldsmobile Alero

1 Answer

85 Yota pick-up, Ultra High and Low Idle, now no start


mcdevito75 here, Could be a dirty fuel fliter, remove fuel inlet toarb, crank engine but don"t start, container of 1 pint of gas should pump out from detached carb. fuel inlet, if not replace fuel pump. Very high idle and very low idle could also be a major vacumn leak, check all vacumn hoses, also check intake manifold, spray soapy water around intake manifold try to start, if you see water sucked in or engine now starts, there"s your problem, a vacumn leak.

May 04, 2010 | 1985 Toyota Pickup

1 Answer

2004 dodge p0628 code does not start


those year trucks have bad lift pumps on the diesel engine. it is located near the fuel filter. they are also known for starving the injecter pump for lubrication oil due to the pumps low capacity. it is now recomended that an in the tank pump change over kit be installed

Mar 23, 2010 | 2004 Dodge Ram 3500 Truck

1 Answer

2001 f350 diesel craks but wont start


SOUND LIKE THE ELECTRIC LOW PRESSURE FUEL PUMP CHECK FUSE TO SEE IF PUMP GETTING POWER. IF NOT REPLACE FUSE AND CHECK THE WIRE TO PUMP.IF PUMP IS GETTING POWER..REPLACE FUEL FILTER FIRST.IF IT DONT HELP.COULD BE THE ELECTRIC LOW PRESSURE PUMP. FAULTY. IT PUMPS DIESEL FUEL IT INTO INJECTION PUMP TO BE PRESSURIZED TIMED AND INJECT.SEE IF LOW PRESSURE PUMP DONT WORK THE WHOLE ENGINE WONT RUN.THE INJECTION PUMP NEED FUEL FROM LOW PRESSURE ELECTRIC PUMP TO RUN ENGINE.

Aug 11, 2009 | 2001 Ford F350 Super Duty SuperCab

1 Answer

F350 T/D 4WD CRANKS BUT WON'T START


are the batteries fully charged? Low voltage will keep vehicle from starting the fuel pump is on the frame rail below the drivers door you can check the voltage at the pump it could also be fuel pump relay

Mar 01, 2009 | 2002 Ford F350 Super Duty DRW Reg. Cab

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