i own a 94' t-100 dx it has a v6 and is two will drive.my problem is ever since i ran it very low to empty of gas i started with the problem it would miss stumble bog down no power and you had to give gradual throttle to make it go some wat anyways i took it in and they changed fuel filter along with basic tune ups stuff. two days later the check engine light came on and the same problem started i did a code check and it came up 71 so i changed the egr vacummme modulater than even changed throttle speed sensor than i even dropped the gas tank and check filter .all good no deprie in tank either.one thing that is to notice thatwhen i first start truck up in morning it runs perfect but it will only last for 7-15 min than stumbling etc would start it never stalls out but you have to gun the throttle at a stand still otherwiseit would stall out any help on this would be greatly accepted please forgive my spelling
You've probably already solved the problem, but I've always used universal cats made by Dynomax or Walker - you can get one that matches the type and style (but the not appearance, usually much lighter and less bulky) of your stock unit - you can even get higher performace high-flow cats.
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Check out www.jegs.com or www.summitracing.com.