Lurius

iTrader: (7)

Well, I havent seen this happen ever before..

This is SFI fuel hose, included in my kit(granitelli brand, but w/ walbro fuel pump). Same kit many companies online sell.




So, anyone seen this happen before? I havent heard of it =(

-Lurius

PS: Im going to replace it with a new hose from autozone/pepboys/oreilly's/wherever I end up gettign a ride to.

superchargedbandit

I Have Never.

wait4me

iTrader: (10)

does it say high pressure fuel line on it? I would say they just sent the pump out with low pressure fuel line.

thelostartof

i have seen it in more than a few cars

most of the walbro kits out there these days the 9" or so of fuel line included is NOT up to par for use in tank as we had to pull a pump 4 times before we gave up and just got some fuel line that we KNEW was rated right. the shop that sold us the walbro's and extra hose said it was rated for in tank use and safe but we found it fell apart after 3 days of being soaked in fuel

andereck

You need to look for SAE J30R10 rated hose for in-tank efi applications. If you have say R90 hose it can deteriorate when submerged in fuel.

Breaking Stuff

iTrader: (11)

Is this on an outdated kit or something? Thats just plain stupid that they would sell something like that. I was looking in to a walboro, but now Im thinking maybe not.

wait4me

iTrader: (10)

there are 2 different types of fuel hose though that can be submerged though. One is for HIGH pressure, and one is for low pressure. Just because it says fuel on it dont mean it can handle 70+ psi.

Lurius

iTrader: (7)

Geez. I just called up 5 different shops and nobody carries SAE J30R10 in stock.. Soonest I can have it is tomorrow at 9am for 21.90 a foot! Only sold by the foot. I ordered it, gotta get this done right.

Thanks for the info guys, I had just gone and bought more r9 hose before I read this lol. Guess I wont be using it!

-Lurius

andereck

The R10 hose is designed for efi pressures.

Country Boy

iTrader: (24)

Ive had it happen. I used the little S hose that came with my Walboro pump and it blew up. I used Fuel Injection hose from autozone and went 40k and never had a problem.

Lurius

iTrader: (7)

Fixed it today, started up just fine. lets hope the r10 holds up!

-Lurius

adz

What are some symptoms of low fuel pressure on an LS motor? Jessie, you tuned my computer and I got my motor running the other day. It's a '99 LQ4 in a '73 blazer. It ran great the first few times I started it up. I let it warm up for at least 10 minutes and then revved it up a little. It sounded great, ran smooth and quiet. Then I took it out for a test drive and it was gutless. It almost immediately started running like it was running a cylinder or two short (vibration, no power, etc.). Then I slowly let it accelerate, and it would just hit a flat spot at about 1/2 throttle. I turned it around and took it back. By the time I got it back it was running even rougher, and when I'd give it a little bit of gas it'd knock (like a pinging).

I freaked, but now that I've given it some thought I think it must not be getting enough fuel, or fuel pressure.

I installed a tank with fuel pump from a 96+ tahoe that I found at a local wrecking yard. I guess my next step is to check fuel pressure, but can someone tell me if I'm barking up the wrong tree?

wait4me

iTrader: (10)

Fuel is for sure the problem sounds like. 58psi is target.

Nasty N8

iTrader: (33)

Ya stock 96 Tahoe pressure is only 43psi you need a pump capable of 58psi and more volume. What are you using for lines and a regulator?

Nate

Blown383

iTrader: (2)

I had the same thing happen to me when I bought EFI hose from Autozone...it was like $5.00 a foot. I would suggest either going with stainless braided line or transfering the OEM plastic crinkle hose over.

-B

1QUIKWS6

iTrader: (61)

It appears from your pics that you have the incorrect type of hose for a hi pressure, submerged application. The correct hose is either the J30R10 as stated above, or the stock style plastic corrugated hose.

Any other hose, even the J30R9 are not designed for submerged applications and will turn to mush over a short period of time.

Of course, you will have to destroy the stock style hose to get it off - so re-using that is out of the question.

I have purchased both the J30R10 and corrugated hose online. Prices are as follows:

J30R10 5/16" 6" long piece - $1.50/ea
Stock Style Corrugated Flex Hose - $2.50/ea

I PM'd you the link...

-Jay-

hellbents10

iTrader: (10)

I have seen it before. Also the 96' tahoes with the 5.7l run at 58psi too. They need to open the poppets, 43 will not do it.

Deerhunter-Z28

wow, crazy

Dirty 30

iTrader: (96)

I know this is an old thread, but I've been searching everywhere and can't find the stock style corrugated flex hose. Help please

Dirty 30

iTrader: (96)

auto performance engineering

Finally found it close to me!