Engine running on 5 cylinders after running for a while

When I shut my engine down after I’ve been driving it for a while whether to get gas or just Park it going to a store when I come back out to start it up it’s running on five cylinders then when I park it turn it off let it cool down when I start it up again it’s running normal on six cylinders any advise what it might be Sure could use some help on this one

 

Disclaimer...not a mechanic...but when is the last time you replaced all your plugs..had the gaps checked...tested your coils or fuel injectors?

 

Truck is new to me came with new heads timing belt new sensors plugs and wires supposedly everything from heads up turns gray wire 96 cylinders truck is new to me came with new heads timing belt new sensors plugs and wires supposedly everything from heads up

 

I was thinking injector or coil I’ll have to look into it to see how I Can get them checked out can I check them out is there a way to do it or do I have to take it to a shop thanks for your help

 

Not a mechanic either, but you could swap coils and see if the problem follows the coil.

 

I think there are ways to check but you need some sort of voltage reader and need to know what the voltages are supposed to be anyway, but like @4scooter19 swap the coils and see if the problem follows that coil. Sounds like they replaced everything else? Even the ignition wires? If those didn't get replaced one of the ends could of got damaged during the plug swap if they happened to yank it off carelessly.

 

Thanks for all the good ideas going to try all of them this weekend I’ll let you know what I find out. Thanks again everyone.

 

Turned out to be bad injectors replaced all of them motor runs great now thanks everyone for your info