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Old 09-17-2009, 05:44 PM   #16
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Low fuel pressure may be it. When I pop open the tank, sometimes it stalls. Is this cause of low fuel pressure?
you did say it was just breaking in right ?

low to no fuel will be a cause of overlean cond.

major air leak is not good either

wouldn't think a new engine would have major air leak but with some manufacturers you just never know . i suggest befriending a local with excellent rc problem solving abilities
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Old 09-17-2009, 05:47 PM   #17
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I've always broken in my engines wih a hot plug. ANyway perhaps your HSN is very lean, compensated with a fat LSN.

does the engine flame out between low-mid throttle BTW?
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Old 09-17-2009, 06:24 PM   #18
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you did say it was just breaking in right ?

low to no fuel will be a cause of overlean cond.

major air leak is not good either

wouldn't think a new engine would have major air leak but with some manufacturers you just never know . i suggest befriending a local with excellent rc problem solving abilities
Yep, just breaking it in. I guess this extreme heat-cycling would help in the process! I just took it out of the car and applied some permatex on some of the o-rings in case it was an air leak. I also noticed that as the temps went up, idle increased with it... Yeah, local help would be great about now...
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Old 09-17-2009, 06:31 PM   #19
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I've always broken in my engines wih a hot plug. ANyway perhaps your HSN is very lean, compensated with a fat LSN.

does the engine flame out between low-mid throttle BTW?
The HSN is way out from flush. I kept richening it but didn't seem to stop the increase in temps. The LSN was left at factory position. The engine did not flame out as I opened the throttle, but it did cut out a few times when I let go of it.
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