Anyone experience this while launching?

wrathchild · Sep 29, 2011

So went to the track tonight and everything is going fine. Ran 12.16 as a best.
Then my low fuel light comes on and i cant get the car to launch at all. Went from running 12.1 and 12.2 to running 12.7's.

The car would fall on its face when launching. No wheel spin at all. Just felt like the traction control was on but, it was completely shut off.

Any ideas?

Here is a video of one of the runs with the car bogging. Look right after the lauch the nose dives badly.

http://youtu.be/VORmDlbuxI8

Juice2012 · Sep 30, 2011

Sorry to sidetrack, but what mods do you have?

Coyote5.0 · Sep 30, 2011

Are you actually low on fuel, or is there a problem with that as well?

JKidd · Sep 30, 2011

Sounds like you're actually low on fuel. The hard G's during launch are pooling the remaining gas away from the pump causing the car to fall on its face.

There is a TSB about another problem with fuel level and the warning light and running out of fuel with 4-6 gallons still in the tank. Something about dual pumps and a humped or partitioned gas tank and one side running low.

May be a completely separate issue...

wrathchild · Sep 30, 2011

I thought that the car maybe has some sort of fail safe in the tank when the fuel pools away from the pump so you dont run the motor lean. It was just an idea though.

I did fill up after the leaving the track and it took 14 gallons so it was low on fuel.

JKidd · Sep 30, 2011

wrathchild said:
I thought that the car maybe has some sort of fail safe in the tank when the fuel pools away from the pump so you dont run the motor lean. It was just an idea though.

I did fill up after the leaving the track and it took 14 gallons so it was low on fuel.

That was most likely your problem then. If it happens again with 1/2 tank, you might have an issue. But you're pulling VERY low 12 second times so the launch has to be pretty good and I know fuel tank has an odd shape to it probably contributing to your issue. Even with it falling down, you're still throwing up some awesome times.

LAVAgt2012 · Sep 30, 2011

JKidd said:
That was most likely your problem then. If it happens again with 1/2 tank, you might have an issue. But you're pulling VERY low 12 second times so the launch has to be pretty good and I know fuel tank has an odd shape to it probably contributing to your issue. Even with it falling down, you're still throwing up some awesome times.

You're avoiding the one guys question because i was curious of it also, do you have any mods on the stang and if so what you running

wrathchild · Sep 30, 2011

Lava, if your asking me my mods are steeda intake, tune and shifter, hushpower catback and upr upper and lower control arms.

All runs were on 305/35/18 et street radials.

Konrad · Oct 1, 2011

same thing happens in my stock 2007. If I launch hard with a quarter tank or less, she won't get the gas. I won't go to the track with less than a half tank.

wrathchild · Oct 2, 2011

Konrad said:
same thing happens in my stock 2007. If I launch hard with a quarter tank or less, she won't get the gas. I won't go to the track with less than a half tank.

I hope that is my problem. Wont find out until 0ct 26 or if I miss that, it wont be till next season.

Anyone experience this while launching?

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