How To Test FUEL PRESSURE!!

In this video I show you how I was able to test for fuel pressure on my 2003 Chevrolet Suburban. I was using the Harbor Freight fuel pressure test kit which I thought was decent for the price.

***This channel is for entertainment purposes only! Do not do what I do. Do not take my advice. I am not a professional. The methods I use may be completely wrong and/or dangerous. Please seek professional help with anything and everything and do your own due diligence (research). Working on cars is extremely dangerous. I am not responsible for any loss of life or limb or property. DO YOUR OWN RESEARCH. THIS CHANNEL IS FOR ENTERTAINMENT PURPOSES ONLY!***

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[adrianh.]

I watch this guys channel for entertainment not for educational purposes.

[sheputthelimeinthecoconut]

I used to tell my students “the doors are going to fall off, the headlamp switch will fall back into the dash, and the seat will beak while going down the highway. But your Chevy will always get you home if you have an extra fuel pump or two in the glove box!”





Of course we had similar sayings for ford and dodge

[Geckoste]

Here some specs for fuel pressure from the haynes manual 99-06
Fuel pressure (key on, engine off)
V6 engines 60-66 psi
V8 engines
Vin z (e85) 48-54 psi
All other 55-62

Hope this helps someone :p

[nicks]

My pressure is 43 with key on. Around 45 with engine running. Intermittent crank no start trying to figure it out was leaning towards a fuel pump. Gonna try filter first.

[tellsthetruth]

I actually dont like you keeping your audience guessing. We come to channels like yours because we may have a similar peoblem to resolve, not to guess or wait for another week or two to get the answer of what resolved it. Good luck to you and to those who want to wait for a week or two.

[bigospig]

Woo-Hoo, Jimmy! So glad to see you got this fixed. I look forward to hearing what the problem was. I figured it was a fuel supply issue, but I'm guessing it wasn't the fuel pump since it was apparently working.

[UR]

Strong fuel pump very good fuel pressure at 45 psi . Rev it up little pid it will jump to 49 to 50 or more .45 psi at idle is normal because the fuel pressure regulator doing its job at idle to return more excess fuel in the fuel tank. And congrats

[prancstaman]

I had the lines blow off the pump inside the tank a couple of times. Just enough to lower fuel pressure at first and then completely blow off. Gauge jumping around is normal, a sign of the fuel flowing through the lines. Fuel pressure is set at 45 psi for cruise, the fuel regulator has a vacuum line going to it so when you floor it, vacuum to regulator drops to 0 and in turn raises the fuel pressure about 10 psi because when accelerating the engine needs extra gas coming out of injectors. Easier to do it this way because it takes more doing to lengthen the injector pulse and probably create a stumble. Vacuum line going to the fuel regulator is the same idea as an accelerator pump on a carburetor.

[randybell]

The guage fluctuation is normal. May I suggest you buy a service manual like Chilton or Haynes there is a wealth of information and troubleshooting.

[JOne]

Fuel pressure regulator? Thanks for all your videos. God bless you and your wife.

[MrDennisLB]

I just had to replace the Inertia fuel pump switch on my 2001 Ford. 20 years and the spring inside got weak. Next will be the fuel filter.

[rayrudd]

I had one unit that the rubber splice inside the tank that connects the pump to the fuel line was ruptured

[finecrazygunz]

I HAVE THE SAME PROBLEM. Key foward and zero but i crank and goes up to 50 or so...what can it be? Crank no start. Yours was reading 0 key off or crank.

[HUBBABUBBADOOPYDOOP]

I'm guessing a connection came undone- either the strainer sock or the pump itself. As for the fluttering needle- my '89 Buick OEM setup has a component called a "pulsator dampner" that is inline with the pump. Because it's a "roller cell" design- the pulsator turns the pulses into a steady stream; when the diaphragm goes bad- that's what you get. I plan on replacing my OEM with a Bosch Turbine pump, which is far superior.

[Burdain]

Congrats finally got it up and running again. Will I am 100% sure it's the fuel pump. Because I drive GM trucks and that usually what goes bad. About your fuel pressure doing what you see it's normal, It is because the pressure needs to be at specific amount. And when ever it get over that it returns the fuel through the return line. :)

[ronhowell]

the gas in the tank keeps the fuel pump cool running on a low fuel tank can damage your fuel pump. also a fuel pressure switch can cause it.

[billybrewer]

The gauge shakes when running because the fuel is moving through the fuel rail instead of just sitting there at a constant pressure.

[danhenry]

My 99 Yukon did same thing. Replaced fuel pump and was good to go. 👍

[nickhyslop]

Buy a gauge that you can bleed. Have to be able to bleed the air out of it and the gauge won’t bounce around

[clems]

Did you remove the valve core from the schrader valve first ?