Hey guys well my truck has been running great for about a yearnow but just today it started to die on me when i let off the gas. the RPMs will drop way down and sometimes it will got back up to idle but others it will drop so low it dies, but only when i let off the gas and the rpms drop to below idleany ideas?

Thanks Dan

 

Clean up the throttle body and the IAC (on the back side of the TB). The IAC controls the idle speed.

 

also the good old fashioned pcv valve..

 

My truck does this when the battery dies, it takes a few min for it to right itself, I was thinking its just my computer re-adjusting

 

ok well i cleaned the TB and I even unpluged the IAC and it still wats to idle really low after i press the gasand let it idle downi even cleaned the PVC vavle and then cleaned the battery and tested the battery so im stumped

so im guessing the IAC could still be the problem

 

Could possibly be the fuel filter

 

Could be IAC or TPS as well.

 

The IAC may be defective ... or the TPS could be defective ... or it may just need to be calibrated.