karolgt

Hi

Probably I have some "dirt" in my fuel tank (If I have less than 1/2 petrol) I have missfire - sometimes on 3 cylinder, sometimes on 8...etc (but if the fuel tank is almost full, everything is fine)

so I think I have to clean it, but..how to do this?
I couldn't find any "cap" under the tank.

Thanks.

karolgt

Do you know if I can use part number 77100A to pull out the gas from the tank fuel?

newgsman

iTrader: (4)

I doubt that your problem is related tot he fuel tank. Check spark plugs or coils/wiring if you have a misfire on a specific cylinder first. Then check sensors (MAF, O2) and vacuum leaks.

goukie

That looks like the gas tank drain plug so once that is taken out whatever gas is in the tank will come out so make sure you have something to catch it. Make sure there is no flam/spark or anything that can ignite the gas/fumes. But I don’t think your issue is with dirt in the tank. If that is the case then you should check the fuel filter also.

DosyBoy

iTrader: (1)

Why do u think u have dirt? Fuel pump is probally on it's way out... FIRST run cleaner through the tank on a full tank, SECOND check your vacuum hoses, take your plastic engine cover off and inspect every hose, NEXT I would clean the Maf sensor, did u ever run the codes?

karolgt

everything was checked, spark plugs are new, coils/wiring are ok, I'm sure about this because I have LPG in my car and on LPG I don't have misfires and engine works fine.
the problem is only when car was not used for 2 or more days and only on Pb. and only when fuel tank is less than half full

I have MVCI cable, so everytime I have CE I can check codes, and codes are: missfire on 1...8 cyl. (usually I have 1 or 2 codes max).

I cleaned also MAF and throttle.
some hoses under plastic engine cover are new, everything was checked.

This is almost normal for car with LPG, because Pb is used only for start, and if someone forget to drive on PB from time to time (previous owner probably forgot), you can have old gas in tank.

how can I check the fuel filter? this GS has only one under the seats, correct?

karolgt

Ok, I had full tank of gas, I drove 200 km, then I filled up full, then again 200km, again filled up, and then, after 500 km, my tank was almost empty, and no issues after more than ~1000 km, so the tank is probably clean now

Thanks for help.

Bhubb18

May have been a bad batch of fuel