Shops or LS Guru's - Question
 

Question for you guys:

Has anyone ran into a issue like this:

I'll take a ride in my car through my neighborhood and the car stalls/shuts off sometimes after a mild curve or left or right hand turn. Also sometimes after a curve, I'll hit the gas to make it up to a stop sign and the car shuts off?

The car does it at any fuel level in the tank. Car has a L92 FI set up.

I've sent the tank back to Ricks and they made a adjustment, but it's still happening.

Any suggestions?

Are you sure it is a fuel issue? do you have a gauge showing the pressure drop?

no. I'm assuming.

I know I can't fully fill the tank up at one stop. Gas spits back out at me if I try and fill at full pressure from the pump. I have to nurse it.

Does your fuel pressure regulator have a vacuum line? If that hooked up and working?

Did it work fine when first complete and then break or has it done this all along since it was new?

my buddy said no vacuum on the regulator. Car seemed fine when I got it, I drove it for a few days straight and my daily was in the shop.

Do you have a vent hooked up to the tank (like a II Much or Finch style setup)?

Could be a venting issue. Try a drive around the block without the gas cap on it.

Yes, I am running a II Much vent

Did that at the recommendation of Rick's Tanks, issue still happened. I am also using a stock '55 gas cap. Rick's said that was fine.

I would try and see what the fuel pressure is doing when it happens. Maybe you have a pump going out.

Thanks :thumbsup:

Anything else I should be looking at or trying? :poke:

After the engine shuts off, does the car start back up easily? Do you have to wait any length of time before restarting?

Car fires right back up. I come to a stop, turn the key and am ready to go.

I had a similar problem with my LS3. It has been a while but it would just die coming to a stop. I assume you are using DBW? If so that is where I was told issue was Throttle Position Sensor in Throttle body. So I bought TB as that part is molded in on the silver blade TB. The new TB had a gold blade which created other issues. In the end I put old TB unit back on and got a tune after cam swap and problem is gone. Sorry this is not clear answer but it might be the pedal or TB causing you issue.

Thanks, any and all help/suggestions are greatly appreciated!

Please keep them coming!

Anyone else with suggestions or comments? :waveflag:

yes, what is your fuel pressure when this happens?

Can't tell as I don't have a guage specifically for this.

What these guys are getting at is that you are asking for input on a problem that you are having. Several people have offered up that you should check what your fuel pressure is when the car dies.

You then ask for other tips but you have not said what the results on the fuel pressure were.

This should be a step by step process. Easy Stuff first. Fuel..

It sounds to me like you have a fuel issue, with the funny filling (You should fix that first) then the car dying. It could be a failing pump or something on those lines.

Check the fuel pressure first. If the Fuel pressure drops, you have other things to check. Is it mechanical or electrical. Then dig in from there.

If the fuel pressure does not drop on the corners or the stops, you have another issue, could be a bad tune or even a loose wire or terminal somewhere.

Fuel pressure gauge is easy to hook up especially if you have a regulator.....also, why not a vacuum referenced regulator? Not many tuners like those and they dont run as well without a manifold reference.

Sean

Didn't know asking for multiple opinions/suggestions was such a problem? I APPRECIATE each one, and thanks for yours as well. The more suggestions I have, helps this small timer, cut down on wasting money. I've had the tank sent back to Ricks, and they had to adjust/modify the baffle. I am trying to run through suggestions - next will be a pressure gauge. I took the car out this weekend for a run and didn't have this issue.

I thought the same thing. It is most likely is a fuel issue and fuel issues are solved with a pressure test first. Kinda hard to start the diagnosis without that info. Hence why the thread went quite. Go spend 30 bucks for a cheap fuel pressure gauge and report back.