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What line goes to air pressure button and what goes to fuel line

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Fuel line diagram


you may have the wrong line.. its probably a vent hose..not a supply line..take the hose loose and blow air pressure into the tank.. if no gas comes out, its a vent line..

Dec 25, 2013 | Ford Mustang Cars & Trucks

1 Answer

Replaced fuel pump and cant get fuel lines to prime


There is no priming to do

If the injectors are working, any air
in the lines comes out into the cylinders,
then the fuel & your good to go

The fuel pump will push out any air with the fuel

Does the pump come on for 3 seconds with key on?

Do you have fuel pressure on a gauge at the motor?
You can push the button on the gauge to bleed off your air

Jan 23, 2013 | 1999 Toyota RAV4

3 Answers

1994 jaguar xj6 replaced fuel pump,distributor cap and rotor.Will start sometimes but runs rough then stalls.There is no fuel pressure or should I say maybe 15 when it is suppose to have 80.Have to keep...


Fuel pressure at idle with the vacuum line attached to the pressure regulator 34 to 38 psi. with the vacuum hose connected the pressure should be 42 to 45. Try to collapse or block the return line and see if the pressure goes up.Also closely inspect the MAF air duct for torns and false air

Sep 12, 2011 | Jaguar XJ6 Cars & Trucks

1 Answer

1986 Jaguar XJ6 Won't start. rolls over but that is it. replaced fuel pump relay and fuel pump. seems to have fuel at pump inlet, nothing comes out the outlet. I am lost. car ran out of gas before this...


if your fuel pump and relay are new, how about your fuel filter, if your fuel pump is working but no fuel turns out, check fuel pump polarity, if ok, there will be a clogging in fuel lines, take a high pressure air and plug it to fuel outlet in fuel lines test port, allow air to go back up to fuel tank and observe if the air goes, if not, check or change fuel line, if the air goes to tank, direct your fuel relay pin 30 and 87 and check if the fuel runs to the injectors, if not, change a good fuel pump

Jun 27, 2010 | 1990 Jaguar XJ6

1 Answer

Diesel engine, grey market kubota, the turqouise


yes there is a low pressure pump and a high pressure(incjector pump) if your no getting fuel to engine check for low pressure pump to be working may also have air in system which is very hard to get out and a diesel wont run untill most or all air is gone

Sep 05, 2009 | 1984 Dodge Caravan

1 Answer

My saab 1994 900 s has no power to fuel pump


Fuel pump runs or not ? If runs and no presure at out put line than either the pump is toast or the filter (before the pump) is plugged or plane Jane no fuel or a pin hole in the suction line (draws air instead of fuel), if the fuel pump does not run, than check the fuse and the connector at the pump to ensure power goes to the pump.

Aug 22, 2009 | 1994 Saab 900

2 Answers

How do you prime the fuel system when its ran out of fuel cummins


LOCATE LOOSEN THE LOW PRESSURE BLEED BOLT.THEN OPERATE THE RUBBER PUSH BUTTON PRIMER ON THE TRANSFER PUMP.DO THIS UNTIL THE FUEL EXISTING THE BLEED SCREW IS FREE OF AIR.IF PRIMER BUTTON FEELS AS IF IT IS NOT PUMPING ROTATE CRANK THE ENGINE APPROXIMATELY 90 DEGREES THEN CONTINUE PUMPING AS DESCRIBE.THEN TIGHTEN THE LOW PRESSURE BLEED SCREW TO 72 INCH POUNDS.

Aug 20, 2009 | Dodge Ram 2500 Cars & Trucks

2 Answers

2000 blazer 4.3 hard to start (fuel problem)


Do you have the fuel tester hooked the in the overgrown air valve on the fuel rail in the back of the engine? Or do you have the fuel line unhooked in the back and hooked to the pressure pump? You want the fuel pressure to be in that 60 lb range so if you are hooked into the pressure valve on the fuel rail allowing fuel to go through, then I am betting it is the fuel pressure regulator. To get to that, you have to take the throttle body off and take the plastic plenum that covers the injector packs. On the back of the mount where your six pack of injectors are sits the pressure regulator. If it is faulty then it is dumping fuel instead of holding the pressure like it should.
Get a Chilton or Clymer manual and it shows you in pretty good detail how to fix it. I've done it to my 98 S10 with the same engine.

If you unhooked the fuel line so you are losing pressure from the line back to the pump then I would say your pump is letting fuel back to the tank when it shuts off. My money is on the first possibility though.

Good luck

Mar 28, 2009 | 2000 Chevrolet Blazer

1 Answer

Olds alero 2.4 idle fuel pressure


most likely idle air control sensor or low engine coolant I know sounds funny but IAC uses coolant to regulate idle. Idle air control valve or throttle body positioning sensor.

Dec 10, 2008 | 1999 Oldsmobile Alero

1 Answer

Fuel lines


You have the lines crossed. One is pressure from the tank, and the other is the return for the unused fuel to return to the tank. Newer models do not have this, but yours does.
Switch the lines.

Aug 14, 2008 | 1990 Toyota 4Runner

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