Engine miss

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May 22, 2009 | 12:52 AM

bustech81

Thread Starter

Senior User

Joined: Nov 2006

Posts: 204

Likes: 3

Engine miss

Hi all. 01' super duty f250 4wd,250k miles. Idle's very rough and does not get any better with temp. No logged faults however a #7 cylinder contribution failure popped up with the test. No smoke from the exhuast. All injectors sound fine on the buzz test. Pulled the pcm relay and cranked the engine and it cranked fairly smooth. Thinking possibly a failed injector. If it cam unplugged it shoudn't buzz yeah? Any idea's would be great thanks.

May 22, 2009 | 06:16 AM

Visseroth

Posting Guru

Joined: Apr 2009

Posts: 2,447

Likes: 1

From: Northern Idaho

Time to take it to someone with the right equipment and have an injector test run. They can run a click like test and determine if you have a failed injector.

My thought anyhow