Amanda Everhart Posted on Apr 05, 2014

Have a gauge hooked up to low pressure fuel pump and it shows it works but high presssure one doesnt

Have a gauge hooked to low pressure fuel pump & its working high pressure pump no turning fuel loose to engine,has oil pressure what electrical will shut it off,ignition works, not it, what is it?

1 Answer

mantlemaker

Contributor 15 Answers
Posted on Jun 24, 2014

mantlemaker

Contributor

Joined: Sep 18, 2009

Answers

Questions

Helped

2496

Points

Check to see you have oil up to full on dipstick . The high pressure pump picks up oil at the top level so if oil starts to get to low engine will stop before engine damage . The high pressure pump is what makes the injectors fire . Also check the wires that go thru valve cover some times they burn up and you can smell the burn thru the oil filler cap .

5 Related Answers

Anonymous

1990 Answers
Posted on Jan 22, 2009

SOURCE: Oil Pressure Gauge/Engine rattle 2000 Ford Explorer 4.0 6cyc 4wd

Your Oil Pump is Out and will need to be Replaced. This is not a Job that you would want to attempt on your Own unless you have been a Mechanic. Trust Me. Been an ASE Certified Mechanic for 35 Years.

Anonymous

21 Answers
Posted on Apr 13, 2009

SOURCE: Fuel gauge not working

Normally I'd say the float/sending unit in the gas tank is the culprit, however the fact that your service engine light is involved requires further investigation, You need to hook up an obd2 reader to the interface mounted under your dashboard and see what it has to say, there might be a simple error code preventing your gauge from functioning. Many auto parts stores will do this for you for free...

Roger Foster

701 Answers
Posted on Jun 16, 2009

SOURCE: oil pressure gauge shows low / high / middle changed sensor did

Hello mb4494: My name is Roger and I will help you. If by changing the oil pressure sending unit the problem did not change. I would perform a oil pressure test. This is done by removing the oil pressure sensor and inserting a oil pressure gauge. This can be done by yourself or by a repair shop. This needs to be done on a cold engine. Start the engine and observe the oil pressure cold.as the engine warms up observe the pressure. The pressure will drop off as the engine warms up.Should the oil pressure drop below 10 to 12 PSI. then you have internal engine trouble. More then likely a bearing problem. Try dropping the truck into gear and see what the pressure drops off to. Again if the pressure drops below 10 to 12 PSI. you have a problem. I would also check to make sure you have the correct oil switch. a truck with a oil light uses a oil pressure switch. with a gauge you would use a oil pressure sending unit. Sorry for the long reply but want to make sure you check the pressure correctly. Please rate the quality of the answer as this is how we know the answer was correct. Thank You for using Fix Ya. Roger

Ned C Cook

3433 Answers
Posted on Jun 20, 2009

SOURCE: High temp oil light coming on and off, oil pressure gauge reading

Add the quart of oil. Oil also acts as a coolant.

Anonymous

18 Answers
Posted on Jan 07, 2010

SOURCE: oil pressure gauge was flextuating now has gone to

It sounds like your oil pump is going out. I have a 98 ford explore and I went through the same thing about a year ago. I changed the oil pump cleaned the screen and have been good everysince.

Add Your Answer

Upload

Upload an image from your computer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

Loading...

Include an image. It's worth a thousand words.

prev next

Related Questions:

1helpful

1answer

2003 Sonata 2.7-b. When I start it idles for 15 seconds and then cuts off.If I try to excelerate it choke and cut off.Ignition ON the fuel pump works and the fuel gushes out the fuel rail. 430kkm.

Connect a pressure gauge in the fuel line Check pressure and flow , if pressure is low check , leaks, pressure relief valve or regulator, fuel pump. If pressure is high and flow is low replace fuel filter, the fuel pressure must hold with the engine stopped , if not replace non return valve or fuel pump.

Read full answer

May 04, 2018 • Cars & Trucks

1helpful

1answer

Holden Cruze Diesel low fuel pressure. High pressure pump replaced. Low pressure pump working fine Very little fuel coming out of high pressure pump outlet

!st of all unless you have the experience and the correct tools do not play with the high pressure side of the fuel system. The pressure that is created on the high side is such that will cause serious damage or fatility "Seriously". The system needs to be sealed for the pressure to occure if air is in system" no" presssure.
If lift pump is working(can you hear it?) Is it exiting fuel filter and arriving at inlet of high presure pump at correct pressure. (if not replace filter Use Genuine part. If still no good lift pump or power and earth suspect check. Any engine check lights on? if so use a code reader.(im assuming no light as you haven't mentioned it). If all is good to high pressure pump then you are looking from pump onward. Is this an issue that has just occured or have you purchased vehicle in this condition. Any unusal noises The high pressure pump is driven by camshaft is it actually turning the pump I have come across fractured cams or drives. if ok advise holden to check from here on there may be an electrical issue or injection issue possibly allowing air in system or shutting the pump down. You can check the whole sytem for visible leaks and vacuume connections. good luck.

Read full answer

Mar 03, 2017 • Holden Cars & Trucks

0helpful

1answer

Truck will not start. engine only turns over.

Verify that you have spark at all of the plug locations. If you do then you have a fuel issue. Check fuel pump to be working, fuel pressure at the rail. With those three things you should learn what is causing it not to turn over.

Read full answer

Jan 27, 2016 • GMC Yukon Cars & Trucks

0helpful

1answer

What causes low fuel pressure from high pressure pump on Chevrolet captiva.the electric low pressure pump has got sufficient pressure.

the pressure at that line will build to over 25000 psi in an instant but to get that pressure you have to block off the fuel flow so if you just undid the pipe and expected it to squirt through the front of the car then you will be mistaken( DON'T PUT YOUR FINGER OVER THAT PIPE ON YOU WILL LOOSE YOUR HAND )
To check that pressure there is a special high pressure gauge that specialist diesel shops use and it is not for people with limited experience to mess with
Take it to a diesel shop for a pressure test
Common rail diesel pumps will not tolerate anything in the fuel and are prone to failure so a proper pressure test will show if it is the pump or the injectors

Read full answer

Dec 24, 2015 • Chevrolet Cars & Trucks

0helpful

1answer

When the oil pressure is low on a Chevy trailblazer can it stop the fuel pump form working? How do I know if my oil pressure is low? Help me please

Yes the pump can be affected by low oil pressure.
I am assuming you don't have a gauge.
If the oil pressure is low, the engine should be making noise. If the sending unit is faulty, it could be causing the problem even if oil pressure is normal.
You can jumper the fuel pump relay to check the pump, and you can either replace the oil pressure switch or hook up a gauge to check oil pressure.

Read full answer

Nov 09, 2015 • Cars & Trucks

0helpful

1answer

Forester ac compressor cycles every few seconds but pressure on lp side shows high in gauge

Is it possible you hooked up to the factory service port on the high side instead of the low side port ?
Can you hook up a set of gauges to both high and low ports ?

Read full answer

Jul 27, 2012 • Cars & Trucks

0helpful

2answers

I have a 1987 bronco 2, the fuel gauge isnt working at all it says i am empty all the time. what shoudl i do to fix it?

This problem in a Ford is caused by a defective fuel gauge sending unit inside the fuel tank, the tank must be removed to replace the sending unit.

Read full answer

Jan 21, 2011 • 1987 Ford Bronco II

0helpful

2answers

Ive had my fuel pump replaced. Now, after driving for 10 minutes, the engine loses power and stepping on the gas makes it worse. Tech hooked up a fuel pressure gauge and noticed engine fuel pressure is...

if power fine and no fluctuation than the pump itself is problem or problem with filter new doesnt mean cant be faulty also listen to pump if hum goes high /low than pump is surging and is faulty if pump stays steady and pressure test is steady when teted before fuel filter than problem with filter or line

Read full answer

Jun 10, 2010 • 1997 Buick LeSabre

1helpful

2answers

I would like to check the presure on 2007 F350 6.0 heui pump. how can i go about it. l'll be using a presure gauge, but i don't know where to install it, also where is the heui pump located? i would also...

glow plug relay should be on the front are rear of intake.you have a mechanical low pressure pump on the passenger side low near the front. or a electric low pressure pump on the starter side. your truck should have the low pressure electric pump. to check fuel pressure you disconnect the out let line to do a out put test.on the electric low pressure pump.put out let line in a container.crank engine for 20 to 30 sec.you should have a good flow of fuel no dribbles.if dribble replace low pressure electric pump.the mechanical low pressure pump out put test you disconnect fuel line from the fuel filter inlet line.disconnect wire at fuel injection pump electric shut off solenoid .place the fuel line in a container. crank engine for 20 sec. fuel flow looks good.pump is good .if dribbles.replace mechanical low pressure pump.to check glow plug relay you need a .diesel repair ford manual to show you where to put a test light to check the relay.WEAR SAFETY GLASSES WHEN WORKING ON DIESEL ENGINES.DONT DISCONNECT THE INJECTION PUMP LINES WHILE ENGINES IS RUNNING.THE FUEL PRESSURE IS SO HIGH SPRAY IN YOUR EYE CAN CAUSE BLINDNESS.GET IN SKIN OR SORE CAUSE BLOOD POISON. CAN ALSO CAUSE A FIRE BE VERY CAREFUL.

Read full answer

Apr 16, 2009 • 2003 Ford F350 Super Duty DRW SuperCab

2helpful

1answer

Vw polo 1995 has problem starting. when running its fine but think fuel starvation could be the problem as when key is turned engine only seems to bump the car when accelorator in epressed any ideas....

Several things to attack here... use a gauge to check fuel pressure at the injector manifold... should be 80 psi i believe... also check the fuel pump relay it may not be working right in the "start" position... (yes it's actually two relays in one... one for "start" and one for "run"... test this by attaching a light or meter at the pump terminals (under the car, right rear) if it doesn't light right up (or show battery voltage) when key is turned the problem is definitely electrical... if pressure is low, first replace the filters, if still low then suspect the pump(s). oh did I mention there are two pumps? One is called the transfer pump (in the tank) the other is the high pressure pump. Rule out the high pressure pump before suspecting the transfer pump.
Hope this helps...;-)

Read full answer

Apr 09, 2009 • 1997 Volkswagen Jetta

Not finding what you are looking for?

View Most Popular

1996 F350 Crew Cab

Cars & Trucks

2003 Sonata 2.7-b. When I start it idles for 15 seconds and then cuts off.If I try to excelerate it choke and cut off.Ignition ON the fuel pump works and the fuel gushes out the fuel rail. 430kkm.

Cars & Trucks

260 views

Ask a Question

Usually answered in minutes!

Check Out the Latest Top Trucks Report!

View all Fixya Reports

Are you a Ford Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Have a manual for 1996 Ford F350 Crew Cab? Or just drag it here!

Related Topics:

Have a gauge hooked up to low pressure fuel pump and it shows it works but high presssure one doesnt