My 89 p/u just had a tune up that included new wires, plugs, distributor cap and rotor, 02 sensor, muffler, and tailpipe. The truck, before the tune-up and now after, has a rough idle that almost seems as if it will stall out, and then be fine after 2 seconds. The brake light and battery light on the dash flash on and off while this rough Idle occurs.. can anyone help? thanks

 

Alternator maybe....

 

Those two lights at same time on the dash spell: 'alternator'. You may also have a bad battery, since one can ruin the other. Take them both off and have them checked at one of the 'chain' parts stores.

MIke in AR

 

almost certainly your alternator.

 

I Know that the battery was changed about a year ago, so it couldnt possibly be the battery ( I don't think) But i will definatley check on the altenator.. thanks

 

A bad alternator will kill a good battery.

Mike in AR