i posted my problem a month ago fuel or electrical... im have idle problems.i put the truck in gear the rpm's drop low then pick back up. when i tap the gas to back up it stalls . i replaced the following.... tps,iac,iat,fpr,fuel filter,cap ,rotor,plugs and wires. the codes are koeo.. 33,65....koer..411,536,538.. abs litght blinkes the 33,65 codes the one i questioned was 536 which states "could not control low rpm range" the truck runs perfect,lots of power. the engine has a slight miss from idle to 1500 rpm's then it clears up... any answers???????