Engine Miss

[fbrown3]

When I first start the truck in the morning it has a miss, after it is driven for a while the miss goes away. Can any one help???

 

[BigNasty]

Sounds like a heat related issue to me.
The first thing I would do is make sure all the plug wires have tight connections and arent rubbing on anything that can cause them to leak out (or that they have any internal seperations) and make sure there isn't any moisture (been really humid lately?) from the engine cooling off, that is condensing in the distributor cap.

 

[Seabronc]

What year truck and is it carbe'd or EFI'd. Check your timing.

Good luck,

>-

 

[Broncoholics]

I think its the cold start injector that could be bad.
It will run bad until it warms up.

 

[fbrown3]

It's an 87 Ford F150 and is fuel injected.Went to the dealer and talked to them about our conversation and I found out that it has a sensor on the thermostat housing that controls the cold start mixture ( cost about $16.00). It works fine now, thanks for the help.