My stupid fault. Driving on vacation, i was pushing it and waiting to get to the next exit.

CEL started flashing , misfire... CEL goes on .... about a mile later I run out of gas.

The car drove fine most of the time, but every once in awhile got a misfire.

Got home, pulled code, (P0304) cylinder 4 misfire. I don't have COP, it's a 98 expy with the 4.6 165k miles.

Is this likely a fouled injector? I drove about another 700 miles... got close to 19 on the highway..i normally get closer to 20mpg.

i thought it would be 02 sensors, but the code did not read that.

the plugs have 65k on them. The coil packs are original. I bought new plugs and a coil pack... will probably do plug first.

i fear i clogged an injector.

Fuel filter has 30k on it. Always changed at about 30-35k.

 

I'll try to answer my own question..

I think it was a fouled injector. I did change out Spark Plug 4... and then reconnected the battery... that cleared the CEL. Truck is running fine.

Truth is... i think on the long journey home the injector cleaned itself out... now i will just change out the other 7 plugs.... they had 65k on them... the originals went 100k...but they were shot....

the number 4 plug didn't look too bad.

I also ordered BG44k and will run a can of that through a half tank of gas.