2001 Supercrew 4x4 4.6L 180,000 miles.

Last week I started getting intermittent misfires. This started just after filling the tank and sounded like bad gas. I quickly put in 2 cans of dry gas and when the fuel got low I put in a bottle of fuel injector cleaner.

This seemed to help but even after 2 more fill ups and a new gas cap the problem is still there. It now seems that when the tank gets below ½ full the problem starts getting worse.

Any ideas???????????

2/22/07
The saga continues.
New plugs and fuel filter. No help.
Code reader is showing the following:
1131
0181
07E5
058A

I know the 1131 is indicating a bad o2 sensor but I am not sure about the other 3 codes. Codes found using Creader from Launch.

Hope this helps. Problem is driving me crazy about ready to go to Ford!!!!

 

This is after the fact but you use to much dry gas and injector cleaner in a short time.
One bottle to a full tank is enough and it takes some time to act.
Unless there are supporting codes, it's tough to know what the apparent missing is.

 

have you gotten your injectors cleaned?

 

Have you put a fuel pressure gauge on it and do you have any check engine light?

 

When was the last time you replaced your fuel filter?