MAP and MAF readings
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10 Second Club
Joined: Apr 2005
Posts: 685
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From: Clarksville, IN
MAP and MAF readings I posted this over in the PCM section but have not gotten any replys.
I have been doing some logging in Datamaster and noticed my MAP KPA values are up and down at WOT. Is this normal? Same for MAF AFGS's. The MAP KPA will go 96, 95, 92, 96, 91 and the AFGS will go 315, 327, 323, 330,326. Shouldn't the values rise over RPM and peak? The TPS voltage is changing to. 3.86, 4.00, 4.12, 4.41, 4.28 (all at 100% throttle). The TPS is fairly new, original MAF and MAP. Am I having airflow problems (restriction or valve float), voltage problems, sensor problems, or is this normal?. The car doesn't seem to be down on power. I did a search and couldn't find an answer.
I have been doing some logging in Datamaster and noticed my MAP KPA values are up and down at WOT. Is this normal? Same for MAF AFGS's. The MAP KPA will go 96, 95, 92, 96, 91 and the AFGS will go 315, 327, 323, 330,326. Shouldn't the values rise over RPM and peak? The TPS voltage is changing to. 3.86, 4.00, 4.12, 4.41, 4.28 (all at 100% throttle). The TPS is fairly new, original MAF and MAP. Am I having airflow problems (restriction or valve float), voltage problems, sensor problems, or is this normal?. The car doesn't seem to be down on power. I did a search and couldn't find an answer.
Joined: Jul 2007
Posts: 2,861
Likes: 4
From: Ringoes/Flemington, New Jersey
your tps should be steady at wot. try it with the car not running. it should be really close to source voltage (which is generally around 4.8-5v) .
as far as your MAP. it should be steady at whatever the baro is when its WOT. because thats zero vacuum :O
as far as your MAP. it should be steady at whatever the baro is when its WOT. because thats zero vacuum :O
