my truck has been idling rough it also runs rough driving. i changed the plugs and checked the coils. but it didn't help. i don't hear a vacuum leak.
i am getting a check engine light but i don't have a code reader. wonder
how acurate the codes are for this. i've never really had to many problems with this truck. what next? thanks

 

Autozone will check codes for free. Try cleaning the MAF with MAF cleaner.

 

IAC idle air control valve. Its bolted on the back of your throttle body.

 

Get the codes read and it will give you a lot more info to work with. Most auto parts stores read them for free.