Fuel starvation solutions?

[SilleM3]

I installed this kit, and I'm having issues with the lpfp top hat. When the tank is full fuel is leaking slightly past the banjo bolt. I checked the o-ring. It's fully sealing. Anyone else having issue with fuel leaking out when the car is full of gas?

[sly1types]

Originally Posted by SilleM3

I installed this kit, and I'm having issues with the lpfp top hat. When the tank is full fuel is leaking slightly past the banjo bolt. I checked the o-ring. It's fully sealing. Anyone else having issue with fuel leaking out when the car is full of gas?

I would make sure it’s tight and you have to get the rib ground off smooth on the bottom.

[sly1types]

This kit works well. I ran a lot lower than I planned on at Road America and even with the carousel and kink it was good.

This was on slicks running 230s…

[dawei213]

I had 3 drivetrain malfunction issue on 6/10 NJMP Lightning MoE event.
Can be seen here:

It happened at turn 7, after hitting the apex and getting tracked out, when I get back on the gas, I get hit with the drivetrain malfunction. It all happened across 3 different sessions. I pulled into pit, restarted the car and things were good.

The thing was, this happened in Session 1 (full tank of gas), Session 4 (70% tank of gas) and Session 5 (45% of gas). So is this fuel starvation issue given that it's coming out of the left turn and not the sustained right turn others are seeing? Unfortunately, I didn't have an OBDII scanner to check code.

You can see here (go toc minute 14)-

- where most of the time, there's no issue.

[jfritz27]

Originally Posted by dawei213

I had 3 drivetrain malfunction issue on 6/10 NJMP Lightning MoE event.
Can be seen here:

It happened at turn 7, after hitting the apex and getting tracked out, when I get back on the gas, I get hit with the drivetrain malfunction. It all happened across 3 different sessions. I pulled into pit, restarted the car and things were good.

The thing was, this happened in Session 1 (full tank of gas), Session 4 (70% tank of gas) and Session 5 (45% of gas). So is this fuel starvation issue given that it's coming out of the left turn and not the sustained right turn others are seeing? Unfortunately, I didn't have an OBDII scanner to check code.

You can see here (go toc minute 14)-

- where most of the time, there's no issue.

It doesn't look/sound like fuel starve. First, it shouldn't really be happening on left handers, and certainly it really shouldn't happen at all anywhere if you're starting with a full tank. I've definitely fuel starved coming out of the bowl, but on those same sessions would come through the left-hander just fine. What is on your vids seems to be more subtle, but with true fuel starve, it's not. When you're at WOT and it happens it will almost feel as if you simultaneously tapped the brakes for a split-second, there's a noticeable decel that you can feel.

[Alexander13.]

Originally Posted by dawei213

I had 3 drivetrain malfunction issue on 6/10 NJMP Lightning MoE event.
Can be seen here:

It happened at turn 7, after hitting the apex and getting tracked out, when I get back on the gas, I get hit with the drivetrain malfunction. It all happened across 3 different sessions. I pulled into pit, restarted the car and things were good.

The thing was, this happened in Session 1 (full tank of gas), Session 4 (70% tank of gas) and Session 5 (45% of gas). So is this fuel starvation issue given that it's coming out of the left turn and not the sustained right turn others are seeing? Unfortunately, I didn't have an OBDII scanner to check code.

You can see here (go toc minute 14)-

- where most of the time, there's no issue.

I had this same issue and is what started the whole fuel starvation.

Turns out I had a really bad ECU Earth and it was bolted to the LHS engine mount. The mount to the block was a fraction loose. On left hand corners with the momentum and being WOT the mount would shift off the block ever so slightly and the earth would drop off the ECU and do exactly what you have said. Not saying it is the fix but Ive been there too.

[dawei213]

Originally Posted by Alexander13.

I had this same issue and is what started the whole fuel starvation.

Turns out I had a really bad ECU Earth and it was bolted to the LHS engine mount. The mount to the block was a fraction loose. On left hand corners with the momentum and being WOT the mount would shift off the block ever so slightly and the earth would drop off the ECU and do exactly what you have said. Not saying it is the fix but Ive been there too.

I looked thru the thread and didn't see that. So even with the surge tank, you still ended up seeing the issue? But yes, it occurred right when I go WOT with the gas pedal does it go limp.

What was the fix for your issue? Tighten of the LHS engine mount?

[Alexander13.]

Originally Posted by dawei213

I looked thru the thread and didn't see that. So even with the surge tank, you still ended up seeing the issue? But yes, it occurred right when I go WOT with the gas pedal does it go limp.

What was the fix for your issue? Tighten of the LHS engine mount?

It was nothing to do with fuel. I thought it was as more confident I got, the fuel level was going down and really happened hard around quarter of a tank.

The earth is meant to be on the back of the head - the engine was removed previously and the earth strap went to the LHS engine arm(mount to block) Meaning unless the bolts to the block were tight then it would split the earth to the ECU. Not saying this is your problem but was my fix for the above.