Yesterday I discovered how much the AFM is sensitive the the way you put it.
I'm still in shock from this discover...
Specially since I saw quite a lot of photos with the AFM installed standing on the side but cannot find any post related to that!
When I installed the RC engine in my ST182, I had an open air-filter so I turned the AFM 90 degrees (the connector points up) to save some space.
Since then, I had a problem that the mixture is so rich you can smell the unburned fuel coming out of the exhaust pipe and it barely can run above 4K RPM.
While trying to figure out what causing the rich mixture, I've replaced almost everything (ECU, AFM, coil, plugs, spark cables, ignitor, O2 sensor, you-name-it) and the problem stays...
Eventually, I patched the AFM to adjact
Last Sunday, I've installed the original air-box back (because I've decided that there is no point to give the engine hot air...) and and the AFM in the original position (connector points backward).
Suddenly, I had verrrrrry lean mixture, so I removed the patch from the AFM and I didn't believe, all the rich problems disappear!!!.
So today, I did a test (because my friend claims that its because of the air temperature), I put back the open-air filter but left the AFM in the original aliment and it still works perfectly good.
When I just turned the AFM 90 degrees and all the rich problems are back!.
Bottom line, AFM is VERY sensitive to mounting aliment!
All of you who installed the AFM on the side but use 3rd party ECU which calibrated to your setup probably didn't notice that, but what about all the others who use the original ECU?
And now a question, did I'm an idiot and blind to miss all the threads about this or there was no thread on that and you're in shock like me?
I'm still in shock from this discover...
Specially since I saw quite a lot of photos with the AFM installed standing on the side but cannot find any post related to that!
When I installed the RC engine in my ST182, I had an open air-filter so I turned the AFM 90 degrees (the connector points up) to save some space.
Since then, I had a problem that the mixture is so rich you can smell the unburned fuel coming out of the exhaust pipe and it barely can run above 4K RPM.
While trying to figure out what causing the rich mixture, I've replaced almost everything (ECU, AFM, coil, plugs, spark cables, ignitor, O2 sensor, you-name-it) and the problem stays...
Eventually, I patched the AFM to adjact
Last Sunday, I've installed the original air-box back (because I've decided that there is no point to give the engine hot air...) and and the AFM in the original position (connector points backward).
Suddenly, I had verrrrrry lean mixture, so I removed the patch from the AFM and I didn't believe, all the rich problems disappear!!!.
So today, I did a test (because my friend claims that its because of the air temperature), I put back the open-air filter but left the AFM in the original aliment and it still works perfectly good.
When I just turned the AFM 90 degrees and all the rich problems are back!.
Bottom line, AFM is VERY sensitive to mounting aliment!
All of you who installed the AFM on the side but use 3rd party ECU which calibrated to your setup probably didn't notice that, but what about all the others who use the original ECU?
And now a question, did I'm an idiot and blind to miss all the threads about this or there was no thread on that and you're in shock like me?