Question Posted By: H.D.30-06 on 8-3-2006
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||Hooker tuned flow 2 into 1 exhaust
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||Engine "diesels" after shutting it off.
||I did the exhaust & carb re-jet over a year and a half ago, the dieseling just started a few days ago. Could it be a drty air filter?
- Dieseling is caused by excessive combustion chamber heat in a naturally aspirtated engine. You can get there by several means:
1) Low octane gas
2) Carbon buildup from too rich a mixture
3) Ignition timing too far advanced
4) Fuel mixture too lean due to opening up exhaust flow without adjusting the carburetor jetting accordingly.
Take your ride and have it tested on a EGA (exhaust gas analyzer). Unless you've fucked with the timing yourself, or your using shit gas, you'll probably find your running too lean. By: 47Knuckle-Dragger on: 8-3-2006
- Found the prob. I have the screamin eagle stage 1 air cleaner [ it came with the bike when I got it]The center rubber section of the air filter was gone. How the hell that happened I don't know but I got a new filter and I'm back in the wind. Thanx Knuckle. By: H.D.30-06 on: 8-6-2006
- Then there's that weird shit no one really expects until you have a hands-on look-see.
Glad you found the easy fix. I'd stick a new set of spark plugs in it if it were mine. It'll give you a fresh benchmark to check on how the engine's a/f mixture is performing after the fix. By: 47Knuckle-Dragger on: 8-6-2006