I believe my 02 v6's gas gauge has been incorrect ever since I got the fuel pump w/ sending unit replaced. whenever I fill up it goes about 1/8 of a tank's worth over the full line, maybe a little less. is there a way to get it to set right? I looked up the issue but just kept finding people who's gauges get stuck in one position, mine still goes down.

Related to that, it's going down far too quickly. I drive normally as it's my daily, but I tend to get about 200 miles to a tank. I've replaced the pump and sending unit as said, the fuel filter, run cleaner through the car, replaced a coil, plugs and wires.

One more thing, my SES light blinks once I get going around 70+mph. It's on all the time due to code P0452, which I've tried to fix (above things, FTPS is part of sending unit, gas cap replaced as well.) I've only let it continue to blink once when I was in a real hurry, and that one time it never stopped blinking even after I parked. It stopped after the car was turned off, but the next start was crappy. I've read that this is a signal of misfiring which I did not feel at all. The car loses no power and the ride doesn't change a bit.

 

the 93-97 fuel gauge is always over the full mark when its full. mine gets to the full mark at 100 or so miles. i thoght the blinking ses light was vats. so whens the last time you had it scanned?

 

Mine didn't before the parts were replaced, so I figured it might need some sort of calibration or reset - I don't know much about that stuff. I had the codes scanned yesterday and P0452 is still there, the bad MAF code is still there but it needs to be cleared because I replaced the sensor, and it actually gave me misfire codes this time around, multiple random misfires and cylinder 3.

Edit: I put in NGK plugs and high end wires (I forget the brand) less than a year ago, as well as replaced one of the ignition coils, because I've had misfire issues before.

 

My gas gauge same as craby. It usually goes over full and doesn't drop to full till about 100 miles or so.

 

If you already replaced the MAF, check and test the wiring going to it.

 

mm can be the hardest to find. try looking under the hood in the dark with the engine running. want it as dark as possible. look for any sparks around plug wires and coils. also in the light, inspect the coil, look for cracks or lines that look like a crack (spark trail) where the plug wire connects. low or high fuel pressure can contribute to mm so have you tested the fuel pressure?

 

as far as the gauge most all do that ,just know it runs out at .1 8/th fill up at a quarter

 

Thanks for the replies. My fuel pressure was low before the new parts were installed, but I haven't had it checked since because I'm currently unemployed and don't have any equipment myself (not to mention I don't know a whole lot about it.)

 

I'm actually having an issue with mine as well, thinking about it.

Going to fill it up, if I stop by a decent pump station, by that I mean one that's got a pretty good fill speed at their pumps, the Camaro doesn't like it.

Seems like it's not venting properly or something. If I go full squeeze, it'll just gag the pump out, and it'll click off, like it's trying to throw up back into the nozzle. If I go easy with it, and just kind of slowly, not TRICKLE slow but still about 1/4 squeeze, it'll slowly take a full tank.

Really seems like it's not venting at all properly. Didn't do this on the drive back from Valdosta, because I had to fill it up completely there, and doing a regular speed fill up was no issue. There's no fuel pressure problems, car runs fine.

Maybe something is pinched/collapsed?

 

The poor gas mileage is really far more of a concern to me than the fuel gauge, honestly. Any idea what could be causing that given the information I've provided so far?