2004 Fleetwood Flair 8.1 engine fan noise
I thought I'd post my strategy for taming the fan noise on my 2004 Fleetwood Flair. My coach has a 'hatch' in the middle of the engine doghouse. Removing it and looking inside made it clear the doghou...
Forum Discussion
rgatijnet1 wrote:Understanding stoichiometric values. HERE
Take your scan gauge and see if your Air fuel ratio is still 14.7 at normal cruise.
If it is not, it is because your engine is running too cool and the computer is enriching the mixture as if the engine still had not warmed up.
If your AF ratio has gotten to 14.7 then all is good. If not, your engine will be running too rich and burning extra fuel. In the old days, to some extend cooler was better. Now with computer controlled engines, and change in one parameter is met with an automatic change in something else.
You may also want to check your firewall for any open spaces which will also let noise in to the cockpit.
