2.3L Engine Rough Idle off High Idle

[Willub]

Well, figured it out. Cylinder 1 has a burnt intake valve. Cylinder head time! Anyone know if the ARP stud kit 151-4301 is compatible with the bronco? Its listed on ARP site for 2.3 Ecoboost but doesn't mention Bronco. They are the 2000 Series good to 220k tensile strength.

Interesting. Curious to see how much carbon buildup you have on the backside of those things.

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[CliffordTheBigRedBronco]

Interesting. Curious to see how much carbon buildup you have on the backside of those things.

Basically zero.

 

[Willub]

Basically zero.

 

[CliffordTheBigRedBronco]

Well, it turns out the issue was carbon. Although the valves were relatively clean, there was a peice of carbon that burned to the valve and also the valve seat causing it to hang open. A new cylinder head and some ARP Studs later, and shes good as new.

 

[Brian_B]

That cleaned up nice!

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