Originally Posted by ZDan (Post 3449959)

This morning I went to pull the basket from the driver-side fuel tank. Forgot to pull the fuel pump fuse so got a bit of fuel spray! Fortunately contained within the metal underseat area, nothing got on interior bits. Lotsa fuel vapor inhalation... Unscrewed the big plastic collar, tried to pull the basket but immediately fuel fricking POURED from all around the perimeter. Lotsa fuel, still contained in the underseat metal area. More vapors inhaled... Gave up and put it back together. The good news is that the fuel gauge went from sub-3/4-tank indicated to FULL, which by my calcs it shoulda been. Jostling the basket a bit apparently freed the level gauge up and now it works fine. I'll have to run the tank to empty to investigate further. Have to suspect recent installation of Verus fuel door, which went very smooovely but I have to wonder if it mighta busted loose from its pivot points. FWIW the part I got was a 3-D printed plastic thing and NOT the aluminum part with steel(?) pin shown on the website here: https://www.verus-engineering.com/sh...-wrx-387#attr=.

After breathing normal air for a while, took 'er out for one practice session before TT. Got fuel starvation again after ~4-5 laps. Same as yestiddy. TT is 3 laps so no prob there but damn...

The good (GREAT!) news is I went way faster in the TT than in any practice session. Expected P3 with a high 1:23, but won my class with a 1:22.2 vs. 1:22.6x 2nd and 3rd places. Hellzyeh!

Did open track, again got fuel starvation after ~5 laps. Unlike at NHMS and Palmer, where it happened after extended >180 degree banked lefts, I seemed to be getting it most often halfway through the T1-T2 *right*-hand corners at Thompson Speedway, after a long straightaway! Very very weird...

I'd love to hear any theories about wat dafuq is happening, and solutions that don't involve replacing the stock tank with a fuel cell. TIA!

Originally Posted by NoHaveMSG (Post 3450268)

Surge tank is the next step. I don't think the fuel basket holds enough fuel for long sustained corners to keep the car feed. I am still getting fuel cut too with the verus fuel door. I need to keep at least 1/4 tank in my car.

Originally Posted by jflogerzi (Post 3450310)

He was getting it at nearly 3/4's full...

Originally Posted by FR-S2GT86 (Post 3450264)

Have you begun monitoring your fuel pressure yet? Are you absolutely sure your engine is actually starving for fuel or could it possibly be something else?

Originally Posted by Sapphireho (Post 3450360)

Did you replace the black rubber seal(one time use part) and the green ring? And did you put it together properly? I have yet to meet a twin "expert" who has done it correctly.

Originally Posted by renfield90 (Post 3450413)

The one thing I'll point out is that the car will not update the gauge reading unless it detects slightly more than 2 gallons added.

Originally Posted by renfield90 (Post 3450413)

The one thing I'll point out is that the car will not update the gauge reading unless it detects slightly more than 2 gallons added. Otherwise the gauge just assumes you parked on an incline or the fluid is sloshing around. (Fun fact, if you're on too steep an incline or jack the front end of the car high enough, it will adjust the gauge closer to full!)

The needle's movement towards empty is always a calculated value - e.g. it knows how much fuel is being used and subtracts it from the current gauge reading. So if it doesn't detect a fuel level change big enough to trip it's "this guy just added gas" logic, it'll continue its march towards zero and even give you the fuel light way too early.

It's possible that the fuel level reported by OBDII is more accurate but I haven't tested this myself.

Originally Posted by steverife (Post 3450474)

My gauge definitely changes with small fuel additions. We added a gallon of fuel at the Pro Solo in Bristol the other week and the gas light went off and the gauge moved pretty significantly.

Originally Posted by TunaNoCrust (Post 3453765)

Dan I know how to fix it....
Drive slower!!!

Originally Posted by ZDan (Post 3453767)

nevar!

Haven't done a thing to address the issue. Palmer2 coming up with a long extended lefthander (turns 1-2) that has given fuel starvation (albeit at 1/2 a tank rather than >7/8-tank).

Anybody got any suggestions? Current plan is to hope I can consistently get 4 good laps (all I need for the time trial) starting with full tank. But "hope" is often a shite plan! Sometimes works OK tho...

Originally Posted by ZDan (Post 3453767)

nevar!

Haven't done a thing to address the issue. Palmer2 coming up with a long extended lefthander (turns 1-2) that has given fuel starvation (albeit at 1/2 a tank rather than >7/8-tank).

Anybody got any suggestions? Current plan is to hope I can consistently get 4 good laps (all I need for the time trial) starting with full tank. But "hope" is often a shite plan! Sometimes works OK tho...