this morning when i started my truck it was running horrible like it has been except kind of worse almost stalled out when i tried to accelerate so i accelerated slowly kept it at about 2000 rpm then out of nowwhere it started runnin awesome lotta power i stopped to head back home rpms were at 1200 lately its been at like 700 i took of again and it even peeled um at low rpm when i got home i put it in park and just sat in it for bout 5 min it idleing at 1200 then the rpm jus drops to like 700 and the trucks running horrible again i had disconnected the battery when wireing up my sound system before idk if that affected anything i'm very confused any help would be greatly appreciated

 

My guess would either be the throttle position sensor or the map sensor but I'm not sure.

 

^^That or could also be a dirty MAF or possibly bad injector. Is it throwing any codes?

 

if there is no codes, it may work itself out. my truck ran like crap after i disconnected the battery, it threw no codes though. took it to a mechanic he was confused he guess the computer just had to relearn. and now it runs good.

 

it threw p1157 or something like that 4 lean codes if the injectors were plugged wouldnt they be bad all the time not work good some of the time