Symptoms of a Bad High Pressure Fuel Pump (HPFP)

The symptoms of a failing or bad high pressure fuel pump (HPFP) and how to tell if it has gone bad.

What is a High Pressure Fuel Pump?
An HPFP is an advanced mechanical fuel pump that injects highly pressurized fuel directly into the cylinders of gasoline direct injection (GDI) engines.
This has many benefits, such as better emissions, improved fuel economy, and more power.

A GDI System Has Two Fuel Pumps:
An in-tank pump that’s pumping fuel to the engine. (40–75 PSI)
A high-pressure GDI fuel pump that’s creating high fuel pressure. (Pressures can go as high as 2,500 PSI)

Symptoms of a Failing High Pressure Fuel Pump (HPFP)
Rattling Noise in the Engine Compartment
Check Engine Light on (Fuel Pressure or Misfire Code)
Hard Start
Stalling
Hesitation When Accelerating Between 2000 RPM to 4000 RPM
Poor Gas Mileage
Low Power
Rough Idle

By using this information user assumes all risk of use.

[dustinnelson]

Also if you have a bad high pressure fuel pump you’ll smell gas when doing an oil change or on your dipstick

[GeeTrieste]

This helped a little, but I was looking for a HPFP for a direct injection diesel engine.

[kPanosk]

Hey! So good video. Not big, on point and clear explanations. I have a BMW 116i 2007 e87. (N45 B16 A). I had previously changed O2 sensor and MAF sensor, exhaust sensor, as I had codes for them. The codes disappeared and left a code for exhaust vanos. So I decided to change both of them as well as the exhaust sensor. But after I changed those, the car has very rough idle, shaking engine and misfirings. Codes for cylinder 4, camshaft sensor exhaust and vanos exhaust (both are new). I had an idea that might be fuel injectors and as I open the valve to depressurise the petrol in rail there were no pressure. Is there possibility to be the fuel pamp(s)? Please help

P.S. To mention that the car experiences symptoms you describe in video (hesitation, check engine oil, rattling noise, stalling) except rough idle and shaking engine. The last appeared after the vanos changed.

[mduduzibhembe]

Vehicle stalls, invariably, after finishing slopes. Even small slopes. It will stall if you press hard on the gas. Reluctance to move from standstill. Black exhaust fumes. 1AZ engine. Toyota Noah. What could that be?

Thank you for this video.

[collieacewhite]

My car never had a sound coming from it. It was quiet, now I hear noise coming from under the hood. It’s a 2010 Lexus gs350 now it sounds like a sports car when I press the gas. I hear the noise under the hood not from the back of the car. What’s wrong with my car? Can you help. Please explain.

[mabasoemanuel]

I have a hard start when warm, smoke and performance is less. can it be the high pressure pump. M57 engine 530d

[beamerandthebeast]

I wonder.. while driving.. would you have misfires, loud gunshot pops and bang only on acceleration, under heavy load, heavy misfire then code, but on deceleration, sounds normal?

Idle also a little choppy, but engine otherwise runs kinda smooth..?

I replaced injectors, coils, plugs, checked fuses, tested my low pressure fuel pump, and i have this spare fuel pump, but its used so it may work? Lol find out tomorrow..

Shats your opinion??

[SuperPeoplevoice]

2021 noise coming from underneath the hood .
Can you please upload of the how the fymuel pump noise is like.
Thank you

[albertohart]

very good video, would have anything to say about replacing the HPFP to make more power in a car? I think mine could be faulty and im considering replacing it

[abdulrahmanalsoweyah]

if I have issue with this pump .. its will effect on AFM system ? the car is tahoe 2016

[AnthonyjrMalic]

What would be the pressure of the in tank fuel Pump and the pressure of the high pressure fuel pump for a diesel engine for a pick up truck??? Thank you

[dominiczamora]

I have a Ford 150 3.5 eco boost. Crank no start. Original code was a P0087, i pulled the the pressure line off to see if fuel was coming out of pump in tank, and only a trickle came out when cycling key. I replaced the pump inside the tank, and truck still wont start. Now i have a p00c6 code. Should i replace the high pressure fuel pump next? Resistance readings on sensor on high pressure fuel pump are within specs.

[mcarter]

is the fuel pump connected to the fuel rail pressure sensor

[onrokutan]

Does that also cuz code P02D0 cylinder 3 Fuel Injector Offset Learning at Min Limit has been detected ?

[lonzoreese]

I had a new one put on but it still make noise but not dat loud but it still have dat noise

[TebogoPhalalo]

I have a 2004 Toyota avensis which won't start unless I pour little bit of fuel in the air filter what could be the cause

[modishajobo]

Hi guys can a bad hpfp seal and cam follower cause fuel to leak in oil?? Because I smell gas from my dip stick but oil levels are normal and I have a oil low pressure signal...kindly point me in the right direction guys....oh its a Mk5 gti

[deontayespight]

I got real question to ask how can I get the sewer out the hole on the high fuel pump what if the sewer broke inside of the hole how can I get tha out of there

[alexxpalacios]

What about if my car is overheating? That’s another symptom?

[Kandy]

So my mechanic had unscrewed the bolt on the hpfp and had me turn key and gas was leaking from the hpfp..and he said that if my fuel filter or fuel pump assembly was bad then gas would not reach to the hpfp...Is that true?