p0089

[Devair28]

This code has been haunting me for some time now. First off under hard acceleration i hear a loud ticking noise from what sounds like the fuel pressure regulator. Anyone have the same problem?

I am at probably around 330 340 horse to the wheels.
Hahn IC
Exhaust with no cat
piping
tune up to 22psi boost
Intake

[JesseB]

Might be the high pressure fuel pump

[JesseB]

Could also be faulty injectors or skewed pressure sensor (from what I've read on the forum)

[AggreSol]

Also could be the fuel rail pressure sensor, as what I've read on the sky roadster forum

[Devair28]

Ok sounds good i already order the sensor for it but should that really cut out the ticking at full throttle you think?

[2KWK4U]

this thread might help:

P0089 with no other DTC's - Replaced fuel pressure sensor to no avail

good luck

[rob the elder]

Originally Posted by 2KWK4U this thread might help: P0089 with no other DTC's - Replaced fuel pressure sensor to no avail good luck

Serously, Moscow???

[Devair28]

Hey 2k4kU4 i read and was doing your was of fixing it but when i pulled the fuel pump fuse the car still started... i did it again and it started bogging down. I then tried to relieve pressure and got all the gas out but when i was about to do the sensor gas came out... what did i do wrong or what should i do from there?

[Devair28]

nvm i did everything. Engine light went off but the ticking at full throttle is still there. Wat could this be and does anyone else have this problem?

[2KWK4U]

Yep, Rob... Moscow. Didn't bring the car with me, though. It wouldn't do so well here.

Devair, your ticking is only there at full throttle? It must be really loud for you to be able to hear it at full-tilt. Do you have a scanner or any other way to monitor fuel pressure in real time? I would suspect that the ticking you are hearing is the high-pressure fuel pump (HPFP).

What year is your car? If it's not an '09, it may have the paper fuel pump sound insulator instead of the thicker rubberized one.

What may be happening, though, is that your HPFP is on its way out. It's a cam-driven mechanical pump, and if memory serves when they fail it's a lever inside that snaps. Been awhile since I read into it, though.

I don't know that changing my fuel rail pressure sensor was ever called for or if it resolved my issue (rather, the issue went away on its own and didn't come back before I put the car into storage a few months later).

[Devair28]

Yes the ticking get load but you know how our direct injectors sound? that muffled tick? it somewhat sounds like that but loader ar full throttle. its an 08

[Devair28]

If there any after market fuel pumps? that do well?

[rob the elder]

We had the HPFP fail on the Dragon. It was covered under warranty. $575 parts and labor.

The challenge is that we are talking about HIGH PRESSURE fuel lines that need to be opened up and then bled after the fact. Personally I am not interested in dealing with the safety issues enough to save a few bucks.

[Devair28]

I just need to know what is making the noise then i could replace it but there is so many mixed things. And GM want 120 got just see whats wrong with it...

[Devair28]

One other thing. Sometimes when i guess the hard has ran for a bit it goes away. The ticking does not start at full throttle.

On a side note. What is the max boost our stock pistons can handle?