90 3vze.when it's cold it takes a while to start then it spits and sputters and the fires up but sometimes runs down a cylinder for a couple seconds,other times it will start up fine,one of the worst problems I have I's that at high rpms it will pop and cut out,low on power too. It's not the afm or igniter or coil, but I still pull a code 14. It rains a lot here do i can't test things very often so if there's something that sounds obvious that I can replace let me know I need help.

 

Have you checked the timing?

 

No I have not but it runs fine at lower Rpm's and warmed up

 

check your cold start valve. might be either unplugged or bad.

 

So the cold start timing switch is located directly to the left of the coolant temp sensor correct,it's pretty small compared to the coolant temp sensor with a single wire on it also correct?...if so I looked at it the other day and it looks all gunked up and corroded...also would a vacuum leak cause a loss in power and intermittent cut outs at high rpm? Also forgot to add that this 3.0 is out of a 94 pickup.