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I am thinking the "in tank" fuel pump regulator may be bad. I am not sure how to test it...and i also can't seem to find anyone who can find me a part number without wanting to sell me a whole fuel pump assembly.
Does anyone know a GM part number for the little black plastic fuel pump regulator with the brass nipple/line ....or know of where to get a replacement from?
If this does not fix the problem i am having with a fuel pump (Racetronix) that is running noisy at all times with no obvious restrictions...i am at a loss.
The Walbro pumps are inherently noisy, I don't think your pump sounds out of the norm, but some Walbro's are noisier than others, and then get real noisy if the are starved of fuel or hot or getting ready to die. Your filter sock could be clogged making the pump work harder which could make it louder than normal. Did you install the pump with a sleeve around it to lessen structure-born noise? Are you seeing any performance issues, or is it just 'noisy'?
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The sock that came with the racetronix pump looks good, no apparent obstructions. I will try and find a place to find a new sock and see if that makes any difference, though my Racetronix one only has less than 1000kms on it.
Does anyone have a pic of a shield or bucket for the 98's specifically?
I haven't been able to test out if there are performance issues, as there is an ECU limiter of 3500rpms in my neutral and 2nd gear. Couple that with the fact i'm on a base STS tune for my new LS2 motor, and my turbo is bleeding off boost at 4 psi.
01ssreda4 - i am a fish out of water with this problem. I have very basic mechanical skills and i'm learning as i go, and thanks to everyone who helps out on these forums, as i have learned a ton!
In the city where i live, there is a garage that specializes in fuel systems, and yet when i took it to them, they told me that my fuel lines and brass t connecter after the fuel filter couldn't possibly be stock as the 90 degree bended fuel line has a weird flare fitting on it.
Turns out that all my componentry is stock under the car (except for the racetronix pump and associated wiring)...which has me concerned now because they couldn't help me out. Why i am concerned is that i have just had professionally trained individuals looking at my car and they didn't know what they were looking at.
We don't have a large aftermarket group of mechanics/technicians that can help out with stuff like this (i am now learning) and i am now stuck.
So bear with me and my hope is that with a bit of time and suggestions, i'll get this problem licked.
It's going to be loud. If your saying that the pump stays on when you have it koeo. I think it's only supposed to prime for 3 mins then completely stop running. Or are you concerned about fuel pressure?
You have a turbo, so you should have a boost referenced regulator. I'm sure you don't since you are talking about the stock tee fitting.
here are some pics if you scroll down showing my boost referenced regulator and my big fuel filter on the front of the fuel rail .
Serious lines serious fuel system. Lonnies all the way. I dont' think a single racetronix is going to cut it anyway FASTRNU not for long with what you have happening now the bigger turbo,408.
So maybe just man up..JOKING and get a nice dual setup from lonnie. no factory reg, no wimpy filter ,big lines,etc. Do it once do it right you have gone this far. Might as well go the rest of the way. And as said boost referenced reg is what you want in a turbo car. not factory reg. But guess have seen that setup with just racetronix used at lower boosts and you are at lower boost at 4psi thats baby boost. Still think you must have boost leak should hit gate in higher gears for sure. Like third. You said the limiter is in neutral and second so go into third and if its still at 4psi you have boost leak somewhere or dud turbo. Or maybe terrible backpressure but the sts has no muffler right. Too restricted an exhaust will severely limit boost. Buddy with sts had clogged cat and it totally killed his power he lost over 100 hp or more. We took out cat and the thing was rocketship again. Are you running cats ,are they clogged>? high mileage.
I wish you could hear my setup and maybe you can if you come thru Kelowna and I have car here. I really don't think my pump is that loud. But i also have mega stereo in the car.
Cutout is not on there right now either between stereo ,cutout , turbo and blow off noises not likely to hear fuel pump.