hi guys my truck is a 91 4.9l. I have been trying to figure out a cutting out issue. It doesn't do it all the time in fact it seems like when its a cold morning 25 or below it will run perfect but when it gets warmer later in the day, sun and 30's it seems to want to cut out like crazy. I have replaced fuel filter and distributor cap. I ran codes but they are at home. i will post them tomorrow.

any ideas?

 

Just some ideas off the top of the head....

-Bad Plugs or wires? once they get warm they screw up?
-Check Vacuum lines
-Check the fuel filter "again." Just in case your fuel tank is rusted up and the fuel filter is catching all the rust or you just got the bottom barrel of some bad gas..

 

thanks Toplait i will check into those. im kind of ruling out bad gas as its been doing this for a good month and its been through plenty of gas