Top end drops out.

[modrmk]

08 D8 Boondocker turbo, mini intercooler. Runs great until about 7000 rpm then it acts like the plugs foul out. No DET, plugs are good, power valves are clean. Think it may be plugged injectors. When it was parked last season it ran fine, this season first ride, problems. Any thoughts?

 

[theshadowrider]

Filter

I am posting this pretty much to everyone that is having problems similar to yours or burn downs, or tuning problems when things ran fine and nothing has changed, or been changed. Did you change your filter out? If not I would get a new one regardless of miles because lot of people posting that they are having similar problems and its fuel related because of plugged filters. I think ethanol gums them up faster. I don't know that for sure but seems to be a good theory.

 

[Silber]

08 D8 Boondocker turbo, mini intercooler. Runs great until about 7000 rpm then it acts like the plugs foul out. No DET, plugs are good, power valves are clean. Think it may be plugged injectors. When it was parked last season it ran fine, this season first ride, problems. Any thoughts?

You are either two rich,

Or you need to gap your plugs down. .020

Try riching up the top end mixture first to see if it cures it, if not start pulling fuel on the top and watch it come to life.

Silber

 

[modrmk]

Plugs are gaped at .020 and it has run for 2800 miles perfectly. I don't think it is to rich. I have however, found that the throttle body boot is blown out on the mag side. This may be the culprit, but usually this just makes you lose boost pressure, or am I wrong?

 

[Holomis International]

That's your problem! Change your boots and it will be good. Also how is your intercooler mounted, if it is mounted to the chassis and the tb I would suggest removing the chassis mount and making another mount to your engine.

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