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07-29-2012 | 11:59 AM

#22

Ambros303

Tech Regular

Joined: Jun 2010

Posts: 435

Quote:

Originally Posted by Herrsavage

I have a quick question about idle: what causes loading up at idle, so that it cuts out after 10 seconds or so - too rich LSN, too rich HSN, or too big an idle gap?

Assuming engine is run in;
Loading up at idle leading to cut out = LSN too rich.

I always set idle gap at 0.5-0.7mm and leave it there. That is one variable out the the equation

, then tune LSN so it idles nicely and consistant. Use LSN to control idle and forget about the idle gap once it's set.

Then work on HSN. If you need to lean HSN a lot then you might have to richen the LSN a bit again (you will notice because idle will get higher/faster).
Btw: If after a high speed pass the engine starts to stutter/machinegun it usually means the HSN is too lean. Richen it 1/8th turn and it should go away again.

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