what is going on?!h

[mikeeee]

hey guys, i have a 1999 q45 and everytime i would crank the car on so it can run, i notice my gas meter drop like the heck??? it would do this most of the times when i crank up the car, doesnt matter if the car has been cold or hot, randomly the gas meter would drop as if i drove 10 miles already when i didnt move anywhere, whats going on? do i have a bad sending unit or something wrong with the gas tank or my cars engine to intaking too much gas at startup? thx guys in advanced.

[AZhitman]

No, there's nothing wrong. When there's no power to the gauge, it's not reading accurately. As soon as you power on, it reads the level and adjusts.

Try it with a totally full tank. DO NOT overfill it, though, you'll load up your emissions canister.

[mikeeee]

No, there's nothing wrong. When there's no power to the gauge, it's not reading accurately. As soon as you power on, it reads the level and adjusts.

Try it with a totally full tank. DO NOT overfill it, though, you'll load up your emissions canister.

but the thing is, how come my gauge gas meter didn't look like it dropped before i turned off the car? an example is me going to grab some food, as im driving there and once im parked there before turning my car off i noticed my gas meter barely moved, but once i turn it off and come back out to the car within 5 mins, i turn my car on and my gas meter just dropped and it looked like i drove a bit further but i didn't do anywhere.

[BadQ45t]

Bad sending unit as you suspected is probably the culprit. I know my 300ZX they would go bad every 10 years....not sure if you have to drop the tank or not on a Q but that is probably it.

[maxnix]

I would check the instrument cluster first. The sender unit is on the fuel pump assembly as detailed in Tangalora's excellent posts for the G50.

fuel-pump-replacement-t6268.html

[mikeeee]

Mmmmmm this is weird, I'm almost at the E mark on my gas meter which would be where my car is suppose to run out of gas but the gas light indicator haven't flashed up, I guess it is a bad sending unit? Where would the gas light indicator show up guys? Where on the cluster? Does this mean I still have gas in tank? I thought the light flash on when I'm near the E mark but not directly almost 1-3 miles from it.