what could be wrong with my truck i got a 93 f150 4.9l just rolled over to 130k. i drive a Toyota to work and back and drive the truck every other weekend and recently i tried doing a 4in lift in the front with coil spring spacers and f250 leafs in the back with 2in lift blocks and when i test drove it it seemed like it didn't have any power, i couldn't get the alignment done so i took all that stuff off and now my truck has no low end power. i don't know if that's stuff had anything to do with it but when i go around corners i cant even sequel my 31's in 1st. i had flex pipe coming out duals out passenger side for exhaust and recently it just broke so i just stuck a straight pipe with a turn down for like a muffler end, exiting before the rear axle and i don't think the exhaust system has anything to do with this either. what could be wrong? scanned for codes none came up and everything under the hood seems OK.

 

No Cat, no Muffler, just pipes?

 

i have cats. on and no muffler. well on another forum someone had said the 4.9l like the backpressure so i just cut a slit in the pipe and weled a piece of flat stock metal in. and it works for now. i dont want to put the exhaust back to stock cause soon i will be putting headers on and well be getting and exhaust system installed after.