Engine idle
01-15-2017, 08:31 PM
#1
Senior Member
Thread Starter
Engine idle
When I have the radio on and the AC on low my truck will idle high then go back down. It'll idle high for about 30 seconds then back down for about 3 minute. Anyone know what's causing this ?
01-15-2017, 08:42 PM
#2
Senior Member
It's more the 'AC on' causing this and it is a normal behavior. The PCM is increasing the rev's to compensate for the power consumption of the compressor. Also, if you go WOT the PCM will kick out the AC to give you a little extra punch.