Question about 1993 Honda Accord

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Want to check fuel pressure but cant find valve was told fuel pump is bad. is pump in tank??

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Hi!!

Yes, the fuel pump is located insde the fuel tank.you check the fuel pressure at the service port located on the fuel injectors rail. it has a cap and looks just like the valve where you put air in your tires. If you don't have a fuel pump pressure testerr, borrow one from AutoZone.

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Posted on Jul 29, 2010

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Posted on Jan 02, 2017

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After adding gas to my Toyota Corolla 2002 LE the engine dies when I start the first time. I start again and it is cranking and after few sec it starts again...it's getting worse


It sounds like the fuel pump is going bad. If you had a fuel pressure tester you could check dead head pressure with the vehicle off and in the run position. A good operating pressure is about 41psi estimation. If you see the pressure drop right away and does not hold the pressure then the check ball or fuel pressure regulator is bad and you need to check those. Im giving proper diagonis procedures before buying somethimg you dont need. You can check a fuel pressure regulator with applying a vacuum to the valve and if the valve diaphragm holds pressure then it is good. Then all you have left is a bad checkball inside the fuel pump assembly. Unfortunately, if the ball valve is bad the whole fuelpump needs replaced. If you replace the assembly replace the filters too. A good tip to save the life of fuelpumps is to never allow the tank to run below a quarter tank because the fuel acts as a cooling system for the pump.

Oct 08, 2015 | 2003 Toyota Corolla

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Have water in fuel Suzuki xl7 how do I drain the tank


no year, huh? some years have a check valve , there,....
this forum is for usa cars, is car USA car?
the tanks just dont like siphoning. (check valve)
the FSM covers this , in the fuel section under bad pump.
1998 to 2006, ill guess, 06

i have the FSM and does not cover. bad fuel, no drain plug.

it shows how to get fuel lower, in filler neck
the tank has check valve at it its metal neck.
so inserting a hose in filler, will hit this check valve.
and all you get out , is 1/2 fuel.
id use the tank out procedure.
then empty all fuel, after step 5.
quote:
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  2. Relieve fuel pressure in fuel feed line.
  3. Due to absence of fuel tank drain plug, drain fuel tank by pumping fuel out through fuel tank filler.
  4. Use hand operated pump device to drain fuel tank.
  5. Remove fuel tank.

tip tank to drain the remainder. out

here is one more way. (IDEA!)
do 1-4
then tip car to left. Jacks then stands at frame.
then remove the filler hose on tank
remove that pesky check valve. from neck last.

and pump out the rest.

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first check fuel pressure with a mechanical fuel gauge that attaches to fuel line schrader valve. around T.B.I. if no pressure with key on check fuel pump relay for correct operation, and also the oil pressure switch has the fuel circuit to it so possible oil pressure switch also. fuel pump has a check valve to keep fuel from going back to tank, so when u turn key on fuel pressure should go up within 1-2 seconds on gauge. if fuel pressure goes down quickly, possible bad fuel check valve, change fuel pump and fuel pump check valve (located right above fuel pump inside tank)

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The fuel pump on a 92 f 150 when I SWITCH OVER TO THE FRONT TANK ITS PUMPS ITSELF INTO THE OTHER TANK WHILE DRIVING .SO IS THERE A SWITCH VALVE BAD OR IS IT ONE OF THE PUMPS OUT? I was told by a shade...


U need to change the pressure operated fuel switching valve, one of the pop-it valves is leaking, it is located on the frame rail just aft of the driver seat

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Low fuel pressure 95 volvo 940 turbo


fuel pump check valve doesn't cause pressure loss, just hard starting cold, the check valve is part of the fuel pump, so to replace the valve u must replace the pump. do not use anything but the orig style pump, here is the part number from THE OE PUMP MAKER AT www.rockauto.com
DELPHI Part # FE0071 PRICE $124.99

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Fuel tanks not switching


the valve is on the inside of the frame rail drivers side about middle of truck.

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Intermintant nonstarting


If my memory i correct you have a fuel pump in the tank to a low pressure line that goes to the injection pump.  Beware, if this is your setup, the fuel rail after the injection pump carries high pressure fuel (around 100 PSI), so be very careful here.  

Since you have checked spark and suspect fuel, get a haynes manual for about $20 (parts store, amazon, haynes.com) and go through thier diagnosis/trouble shooting for fuel system.  Since you understand basis diagnosis, this manual will fast track you on how to best test your exact setup, by people that have taken it apart.

The following info is how I think that system works on a late 90's accord, but they will tell you exactly and concisely ... and save you hours of time.
The fuel pump in the tank probably has a check valve that holds fuel in the low presure line to the injection pump, so that gravity/syphon doesn't pull fuel back into the tank.  These check valves can go bad or get foreign matter in them and intermittently get stuck open.  Before the engine starts, the pump in the tank may get turned on, but frequently this is on a short timer.  If the valve didn't keep fuel in the loine, the timer will run out before the fuel gets pushed back up to the injection pump.  When you turn the key to the on position, listen for a quiet little motor whirring ... if it's there it will probably only be on for a few seconds, then stop,  If this is the case you can attempt to get pressure to the injection pump by turning the key on, then when the pump stops, turn off ... and repeat this 3-4 times. With luck after a few times you won't hear the pump come on ... and it will now start.

This is all based on a 98 Passport (Honda badged Izuzu), but many cars have this setup.  The dealer told be a number of things injectors bad/dirty, wrong spark plug#$@%! but never checked pressure on the fuel rail.   When things are working right, the high pressure fuel rail should hold close to the 100 PSI or so operating pressure indefinately.  This is easily tested by a mechanic by pluggin a pressure guage into the high pressure side, and going back after an hour to see if the pressure held or is dropping;

good luck












is worth about $3-4, but that you cannot get

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1 Answer

Fuel pump and pressure


fuel pump is the unit which **** fuel from the fuel tank to the fuel filter.and keeps fuel on the line ,
inside the fuel pump there is valves which produce pressure to **** fuel from tank.if the valves worn

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