Question about 1994 Cadillac DeVille

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Fuel is not going through - 1994 Cadillac DeVille

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Hard to tell your problem but i assume that you can't gety fuel to engine.Either the fuel filter is plugged or the pump is not running,if you can't hear the pump run then check the fuse and the relay for the pump and if they are good you need to replace the fuel pump.

Posted on Nov 19, 2009

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Hi jeff Armer it is me again with the 2008 tahoe what cause the fuel pump module to go bad i change a fuel pump i buy it from pit boys that pump can cause the fuel pump module to go bad?


What Causes Fuel Pumps to Fail - AGCO Automotive ...

www.agcoauto.com/content/news/p2_articleid/195
The pump is the heart of the fuel pump module and does the work of moving ... Abad fuel pump could cause any or all of the symptoms below: ... This is unfortunate as fuel quality is a real problem and a clogged filter may mean a new fuel pump. ... Fuel with ethanol will go through phase separation if it remains too long in ...

Sep 23, 2015 | Cars & Trucks

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Gas gauge hand goes up and down


FUEL GAUGE GOING UP AND DOWN SOME TIMES FUEL MOVES AROUND IN FUEL CAUSE FUEL GAUGE TO GO UP AND DOWN.I HAVE SEEN FUEL LEVEL SENDING UNIT HAS POOR GROUND OR SHORTING OUT.A BAD FUEL PUMP CAUSING POWER SURGE BECAUSE PUMP BEARING BAD THAT WILL CAUSE FUEL GAUGE GO UP AND DOWN.

Apr 11, 2011 | 1999 Oldsmobile Alero

1 Answer

I have a 2000 f250 5.4 it will turn over but not start.i have power coming from battery checked senors 5 an 7 are the ones that ive found to be the promblem i have only 18 pounds of fuel pressure fuel pump...


i got new pcm to ???? Was it programmed ? Dealer ! checked senors 5 an 7 are the ones that ive found to be the promblem ?????????? What are sensors 5 & 7 ? 2000 PCED On Board Diagnostics II SECTION 5: Pinpoint Tests Procedure revision date: 01/07/2003 A: No Start A: Introduction A1 CHECK PASSIVE ANTI-THEFT SYSTEM (SECURILOCK)
    Note: This vehicle may have an anti-theft system, which may be activated, causing the no start condition. Verify by viewing anti-theft indicator light on instrument panel or a Diagnostic Trouble Code (DTC P1260) may be present.
  • Verify anti-theft system.
Is the system activated?
Yes No REFER to Electrical Anti-Theft, Section 419-01 in the Workshop Manual for diagnosis and testing. GO to A2 . A2 ATTEMPT TO CRANK ENGINE
    NOTE: Verify inertia fuel shutoff (IFS) switch is set (button pushed in). Refer to Owner Guide for location. Does engine crank?
    Yes No GO to A3 . REFER to the Starting Systems, Section 303-06 in the Workshop Manual. A3 IDENTIFY TYPE OF NO START
      NOTE: The purpose of this Test Step is to identify intermittent No Starts in order to guide the technician to the proper repair procedure. Does the vehicle start now?
      Yes No Vehicle is an intermittent No Start. GO to Z2 . Natural gas vehicles:

      KEY OFF. GO to HA47 .

      All others:

      KEY OFF. GO to A4 . A4 CHECK VREF VOLTAGE TO THROTTLE POSITION (TP) SENSOR
      • Disconnect TP sensor.
      • Key on, engine off.
      • Measure voltage between VREF and SIG RTN circuit at the TP sensor harness connector. GO to Pinpoint Test DH to refer to the schematic.
      Is voltage between 4.0 and 6.0 volts?
      Yes No KEY OFF. RECONNECT TP sensor. GO to A5 . KEY OFF. GO to C1 . A5 CHECK FEPS CIRCUIT FOR SHORT TO POWER IN HARNESS
      • Key on, engine off.
      • Measure voltage between Pin 13 at the data link connector and battery negative post.
      • (Refer to the Wiring Diagrams for connector location.)
      Is voltage greater than 9.0 volts?
      Yes No REPAIR short to power. For coil-on-plug vehicles:

      KEY OFF. GO to A17 .

      All others:

      KEY OFF. GO to A6 . A6 CHECK PIP IN THE PCM
        Note: The scan tool must be connected to a reliable power source that is powered with the key in the START position (such as directly to the vehicle battery). Also verify that the vehicle battery is fully charged.
      • Access PIP PID.
      • While viewing the PIP PID, crank engine.
      Is the PIP PID switching on and off?
      Yes No KEY OFF.

      For 2L engines : GO to JD1 .

      For all others : GO to JB1 .

      If OK: Natural Gas Vehicles : GO to A9 .

      If returning from another pinpoint test or all others:

      GO to A7 . KEY OFF. GO to JD1 . A7 CHECK FUEL PRESSURE
        WARNING: BEFORE SERVICING OR REPLACING ANY COMPONENTS IN THE FUEL SYSTEM, REDUCE THE POSSIBILITY OF INJURY OR FIRE BY FOLLOWING DIRECTIONS IN PINPOINT TEST HC WARNING, CAUTION, AND HANDLING.
      • Release the fuel pressure.
      • Install fuel pressure tester.
      • Scan Tool connected.
      • Key on, engine off.
      • Enter Output Test Mode (refer to Section 2 ) and run the fuel pump to obtain maximum fuel pressure.
      Is fuel pressure at the specified pressure (use the fuel pressure chart in Pinpoint Test HC)?
      Yes No GO to A8 . KEY OFF. GO to HC1 . A8 CHECK FUEL PRESSURE LEAKDOWN
      • GO to Pinpoint Test HC and observe WARNING, CAUTION AND HANDLING.
      • Fuel pressure tester installed.
      • Scan Tool connected.
      • Key on, engine off.
      • Access Output Test Mode and run fuel pump to obtain maximum fuel pressure.
      • Exit Output Test Mode.
      • Verify fuel pressure remains within 34 kPa (5 psi) of the maximum pressure for 1 minute after turning pump off.
      Does fuel pressure remain within 34 kPa (5 psi)?
      Yes No KEY OFF. GO to A9 . KEY OFF. GO to HC1 . A9 CHECK FUEL INJECTORS FOR VPWR
        Note: Check at least two fuel injectors, one on each bank. A no start condition can exist only if greater than 50% of the fuel injectors are without VPWR.
      • Disconnect any two fuel injectors.
      • Key on.
      • Measure VPWR circuit voltage at fuel injector harness connector.
      Is voltage greater than 10.5 volts?
      Yes No Natural Gas Vehicles:

      GO to A15 .

      KEY OFF. GO to A10 . REPAIR VPWR circuit. A10 CHECK FUEL INJECTORS ABILITY TO DELIVER FUEL
      • Connect fuel pressure gauge to Schrader valve.
      • Cycle key several times.
      • Locate and disconnect the inertia fuel shutoff (IFS) switch.
      • Monitor pressure gauge while cranking the engine for at least five seconds.
      Is there a pressure drop greater than 34 kPa (5 psi) while cranking the engine?
      Yes No The electronic engine control system is not the cause of the no start. RETURN to Section 3 , Symptom Chart for further diagnosis. REPLACE PCM (refer to Section 2, Flash Electrically Erasable Programmable Read Only Memory (EEPROM) ). A15 CHECK FUEL PRESSURE ON NATURAL GAS VEHICLES
      • Connect scan tool to DLC.
      • Access FRP PID (fuel pressure).
      • Record fuel pressure.
      • Connect fuel pressure gauge to Schrader valve.
      • Key on, engine off.
      • Record fuel pressure.
      Is fuel pressure between 552 and 827 kPa (80 and 120 psi) on the Scan Tool and fuel pressure gauge?
      Yes No KEY OFF. GO to A16 . KEY OFF. GO to Fuel Systems, GO to HB1 . A16 CHECK INJECTOR SIGNAL FROM NGV MODULE
        Note: This test requires a standard 12 volt test lamp. A properly operating system will show a dim glow.
      • Connect test lamp between the injector signal circuit and VPWR circuit pin at the injector harness.
      • Crank engine.
      Does test lamp have a dim glow while cranking?
      Yes No REPLACE PCM (refer to Section 2, Flash Electrically Erasable Programmable Read Only Memory (EEPROM) ). GO to A6 . No light or continuously bright light.GO to HA47 . A17 CHECK PCM DRIVER TO COILS
      • Connect incandescent test lamp between B+ and each coil driver circuit at the harness connector.
      • Crank engine.
      Does lamp blink consistently and brightly (one blink per engine revolution)?
      Yes No KEY OFF. GO to A7 . KEY OFF. GO to JD1 .

Jun 04, 2017 | 2001 Ford F250 Super Duty Super Cab

1 Answer

Hesitating when going a constant speed.. seems to be worse when fuel tank is below 1/2 and going up hill


may need to replace fuel filter.or could be an idle control sensor going bad. try running lucas fuel treatment through it 1st, it may only be a fuel injector clogging up, are you burning ethanol gas? i would go with fueling with good gas and adding the lucas fuel treatment !st before you do anything else. if that does'nt work then replace the fuel filter, if not that then i would replace the idle control sensor.hope this is some help to you!!

Nov 11, 2010 | 2001 Dodge Ram 2500 Truck

1 Answer

I have a maserti biturbo and i was wonering which way the fuel flows wether it would go through air conditioner pipe to the fuel pressure regulator and then into the injectors or does it go the other way...


I've never heard of fuel going thru the A/C lines! But normally it is fuel tank, fuel pump, fuel filter, injectors, pressure regulator back to fuel tank. This is how it works on my Porsche, Jaguar and Alfa Romeo. Good luck!

Mar 10, 2010 | 1985 Maserati Biturbo

2 Answers

Car will not start no fuel going througth


CHECK FUEL PUMP FUSE + RELAY.IF BOTH GOOD SOUND LIKE FUEL PUMP.BUT SCAN IT FIRST TO MAKE PCM IS WORKING.BECAUSE IT CONTROL FUEL PUMP.

Feb 01, 2010 | 2001 Ford Focus

1 Answer

2001 dodge durango 4.7 fuel pressure flutters during idle


IF FUEL FILTER HAS BEEN REPLACED.FUEL PRESSURE REGULATOR IS GOING BAD OR NOT GETTING VACUUM.CHECK VACUUM LINE GOING TO FUEL PRESSURE REGULATOR.MAKE SURE ITS GETTING VACUUM.IF YOU SEE GAS IN VACUUM LINE TO REGULATOR.REPLACE FUEL PRESSURE REGULATOR.IF ALL IS GOOD FUEL PUMP GOING BAD.

Jan 24, 2010 | 2001 Dodge Durango

1 Answer

I dont know where cirtain hoses go, i have a 1994 Ford probe with a mazda mx-6 motor, where does the hose from the fuel filter go? Does it go to the carb, and if yes. where?


94 ford probe does not have carb. it is fuel injection. that hose from fuel filter goes to the fuel rail on engine. if it is a vacuum hose it should go to the fuel regulator also on fuel rail.hope this helps

Nov 07, 2009 | 1993 Mazda MX-3

1 Answer

Re fuel gage.


the fuel tank sending unit is defective in your van, this has nothing to do with the fuel pump going out, this was a 100% incorrect statement by the shop that said this, but do understand that if you pull the fuel tank to repair the defective sender for the gas guage u might as well replace the fuel pump which also is in the fuel tank, they (the pump) are are getting worn out at about the miles you have on this car.

Jul 01, 2009 | 2003 Pontiac Montana

1 Answer

No fuel pressure on 2.9 litre ford ranger


is the pumps running have you checked fuel comes out of it? if it does you will have to move on further along fuel line check next connection (fuel filter maybe) check there is stuff coming through there. Next goto other side of filter check there. Just go along the fuel line checking for fuel pressure. if there is fuel going all the way to the rail check the pressure regulator it may be stuck open therefore the gas would be getting pumped to the rail and going straight back to the tank i.e. no pressure.

Nov 28, 2008 | 1987 Ford Ranger

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