Are you able to restart easily when it cuts off?

Relays don't fail gradually. It can be intermittent.

Answered by KHLow2008 (expert)
39,834 answers provided

Thank you for your rapid response! I greatly appreciate it!

It never dies altogether. It just acts like it's going to die but quickly catches and resumes. It does this repeatedly.

Also, it seems to start the symptoms as the truck gets warmer. It's fine when running a little cold.

It is never difficult to start, so far.

Response from udog
2 questions asked

That should not be a major problem. Seems the idling speed is too low and cleaning the throttle body and IAC should solve the problem.

Answered by KHLow2008 (expert)
39,834 answers provided

Thank you, KH! I'm trying to deal with this while working so it may be tomorrow before I can let you know how it came out. I was thinking, though, how long it's been since that throttle body was cleaned and I'm sure you're right.

Thanks again and I'll let you know.

Response from udog
2 questions asked

You're welcome.

Keep us posted.

Answered by KHLow2008 (expert)
39,834 answers provided

That did it, KH!

Cleaning the throttle body and IAC made such a positive difference that I decided to clean the MAF sensor, as well, and give it cap, rotor, plugs and wires. Problem solved. I had almost forgotten how well this truck can run.

Thanks again, KH! I can't tell you how much I appreciate the help!

Response from udog
2 questions asked

Glad to know you have the problem fixed.

Have a great weekend.

Answered by KHLow2008 (expert)
39,834 answers provided