i was watching it right b4 it backfired and ses light came on, i was in gear, rpms went up on there own it back fired and they cameb ack down (not much just like...2-300 rpms) it only does it after about 14-20 miles, dont do it first in the mornin when i crank it up, i put logntubes on never got puter programed for them, deleted egr air cat etc...changed wires plugs, just changed o2 sensor and fuel filter......what could it be? if it was wires, it would do it all the time not just when it was warmed up a good bit....oh yeah and sometimes it gets so bad after ses light has been on, and i turn car off and turn it back on (maybe a 2 minute gap in btween there) i cant even move it really, it backfires, stumbles, etc etc i give it gas and put clutch in it just jumps from rpm to rpm backfiring and stumbling the whole time, then ses light comes on, it stops doin it consecutivly, and only does it randomly again like normal when ses comes on.............ANY help apreciated, thanks

 

It would be best to know what the SES is for. Time for a scan.