Noisy map signal?
It seems like the AEM does not have any kind of voltage smoothing for the MAP signal and it is a bit difficult to tune. When the car is off the map signal is fairly stable, under idle it moves around a bit but still stays within a cell. However once I start driving the map signal jumps across several cells at a time. When I had my powerfc this was not an issue.
Has anyone encountered this? Is there a way to smooth out the signal? I'm going to run some fresh wire from the map sensor to the computer to see if the problem clears up. |
There is an option called MAP filter, you should be able to find it in Setup>>Sensors>>MAP sensor>>options. If you filter the signal too much, the car might not respond very well to quick throttle inputs. I've got it set to 10 in my car's calibration, don't remember when I adjusted it but 10 seems to be working OK from what I can tell.
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oh wow. I saw it before and "teeth" made me wonder what the hell it was for since I couldn't equate crank teeth with the map signal. I will try this first thing in the morning and I'll let you know how it went.
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If you save and send a datalog along with your cal file and setup specifics I will be glad to take a look at it. I personally have never had an issue with the MAP sensor jumping around erratically.
Just out of curiousity, what MAP sensor are you using? |
gm 3bar. The filter fixed the problem. Everything is well =)
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The GM 3-Bar is notoriously in-accurate, have you thought about replacing it with an AEM 3.5 or 5 bar sensor?
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Originally Posted by D Walker
(Post 10158443)
The GM 3-Bar is notoriously in-accurate, have you thought about replacing it with an AEM 3.5 or 5 bar sensor?
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