map sensor....
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yes we do, its mounted on the top of the intake manifold towards the firewall, as for the range of it im not sure, doesnt matter too much anyways.
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Xtreme07
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what he said^^
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I know when im reading MAP pressure it ranges from obviously 0.0-15.0
Dunno if this helps but while idling I see around 4-7 and at WOT 14.5-14.9
I've read that 15.0 is the max atmospheric pressure so im assuming it would go over that under boost... so with that being known I dunno what the truck would do seeing 16+
Dunno if this helps but while idling I see around 4-7 and at WOT 14.5-14.9
I've read that 15.0 is the max atmospheric pressure so im assuming it would go over that under boost... so with that being known I dunno what the truck would do seeing 16+
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Makes sense... seeing as like I said max pressure for 1 atmosphere is 15psi
I'd ask the other guys who are boosting what they did to get around this or what they bought. But thats kinda obvious...:mc:
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well thats also what this thread is here for lol
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Zach:
Atmospheric pressure at sea level is 14.69psia.
Here in CO it is usually around 12psia depending on where you are.
Unless you are below sea level a reading higher than that is not true atmospheric pressure. There must be some inaccuracy in your sensor or there is some pressure building from running at speed. Assuming that the reading is actually accurate then it proves how there is help from the ram air effect you love to hate; and you aren't even set up for ram air. Lol.
Skizzo:
I never had to change my map out. My MAP should be seeing upwards of 19psia (when I was down in Houston it probably saw above 21psia). I have no problems but there is one change cataloged at cfans in the sts thread that had to be made. It was just for the MAF though.
Atmospheric pressure at sea level is 14.69psia.
Here in CO it is usually around 12psia depending on where you are.
Unless you are below sea level a reading higher than that is not true atmospheric pressure. There must be some inaccuracy in your sensor or there is some pressure building from running at speed. Assuming that the reading is actually accurate then it proves how there is help from the ram air effect you love to hate; and you aren't even set up for ram air. Lol.
Skizzo:
I never had to change my map out. My MAP should be seeing upwards of 19psia (when I was down in Houston it probably saw above 21psia). I have no problems but there is one change cataloged at cfans in the sts thread that had to be made. It was just for the MAF though.
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wow really? and you have been tuned with your kit and all?
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can you do this in HPTuners? and what units is "15000" and "45000" in? (i take it thats what you meant with the K)
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might it have been grams per hr or grams per minute?
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:lmaow:
But yeah. That is all that should be needed.
You bring these things upon yourself. Lol.
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the only time you have to change the MAP is if the ECU is using the map to determine boost levels, for instance, a stock honda ecu does not recognize boost even though the MAP can, so when tuning a boosted honda all you have to do is "ADD" the boost fuel and timing tables to the ecu you are tuning, until you max out the MAP signal, but hondas are speed density cars, so they rely on the MAP for load values.
now with your chevy the ecu never needs to know there is boost or even tables specifically for boost as it uses the mass airflow meter (maf) to determine the amount of airflow. so tuning is done by creating more fuel at more airflow (boost) until the mixture is correct. the maf will still peg out and the computer will go nuts if the MAF error frequency isnt corrected.
basically short answer, dont worry about your map sensor.
now with your chevy the ecu never needs to know there is boost or even tables specifically for boost as it uses the mass airflow meter (maf) to determine the amount of airflow. so tuning is done by creating more fuel at more airflow (boost) until the mixture is correct. the maf will still peg out and the computer will go nuts if the MAF error frequency isnt corrected.
basically short answer, dont worry about your map sensor.
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and it was answered by the same person... but no one said cfans doesnt have good information on it....
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