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super 88 diesel


 
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Mark Felton
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Joined: 11 Nov 2012
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PostPosted: Sun Nov 11, 2012 4:05 pm    Post subject: super 88 diesel Reply to specific post Reply with quote

I have a super 88 diesel that has a strange problem. On high rpms it starts to combustion knock and miss. It does'nt do it all the time. I thought it was an injector staying open. I swapped the injectors with 6 known to be good and no luck. This is a horrible knock with white and black smoke. It is fine at a brisk idle with a very slight miss. Energy cells are clear. The engine starts good hot or cold. I have drained fuel and filters and added fresh fuel. Any help would be appreciated.
 
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johns
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PostPosted: Sun Nov 11, 2012 7:43 pm    Post subject: Re: super 88 diesel Reply to specific post Reply with quote

start by taking the exhaust manifold off and see which cylinder the smoke is coming from.
 
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J. Schwiebert
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PostPosted: Mon Nov 12, 2012 3:54 am    Post subject: Re: super 88 diesel Reply to specific post Reply with quote

Do like johns said. Are you having sticking valves issues and on the same topic, weak valve springs?
 
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