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Discussion Starter #1
hi

today after starting the truck it started knocking badly with huge clouds of grey/black smoke.

i ran a contribution test and #3 and #5 showed as failures.

This is a replacement used engine. These injectors were transferred over from the orig engine after being re-ringed. The injectors were new remanned last May and provided good service in the removed engine and did ok for several 100 miles in this engine.


could this be two injector tips breaking at same time or o-ring/installation problems coincidentally occurring in these two injectors?
 

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Tip blowing off ford trucks isn't common
 

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White lightnin'
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Sounds like an injector tip to me. Guy here local had one drop and sounded like that and smoked like that. He hammered on it all the way home too... :doh:
 

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Discussion Starter #4
hi

wonder why it would cause a c/c fail on two cylinders (3&5) ?

could each injector have a o-ring issue caused by installation?
 
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