1991 f350
 

some time will start then runs rough backfires and acts like flooding changed tsc and the idle senser didnt do nothing could it be firing i sprayed starting fluid and still not hit help

Is your check engine light on? what is the engine size of the truck?

1991 f350 5.8
 

yes the check engine light is on i check see if it has fuel with the vavle on fuel rail and it does then it starts idles irreleglur and switch tanks changes idles rough but will heasitate and backfire

you need to pull the code or codes and tell me what they are. Your truck is a 91 so you have the OBD 1 system.

Here is a link to a thread I have done earlier that will explain how to pull the codes on your truck and a list of codes.

https://www.truckforums.com/forum/sh...ad.php?t=13475

if the above link does not work for any reason you can find the thread in the Ford how to and tuturiol section of this website. The link is titled "OBD1 Codes "How to pull with code list" Ford "