Slight Miss At Idle On Start-ups

[Ruiner]

When I start the truck up in the morning, it has a miss at idle. As soon as I start driving it is fine and has no missing. Just at idle. Is this a common, easy to fix issue? The cap/rotor on the distributor look fine new, the MAF looks new, and even the plug wires are very recent.

[bryfry]

Are your mornings wet/damp? You may think the wires/cap/rotor are ok, but they may not be.

Run the vehicle until it's up to operation temp, leave it running and using a spray bottle, mist some water around the wires and cap area. If it starts to miss, then you found your problem. Have you popped the cap to check for corrosion on the terminals? When were the plugs last changed?

 

Sometimes a miss could be fuel related. If the above does nothing, run a couple of bottles of Chevron Techron through the system. You may have a slightly dirty injector or two.

You have to start somewhere to narrow this down a bit.