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blackhat75 blackhat75 is offline
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Default IAT random drop spikes help - 10-19-2020, 06:55 PM

Good evening,
Recently, I'm noticing my JB4's IAT guage drops for just a second, then comes back to normal temps. For example; while driving to work through stoplight traffic, IAT's will read around 85*F. Suddenly, it'll drop 16, then back up to 85 and hold. Every few 10-20 seconds this happens. It's not throwing any code(s) atm but I'd like to try to resolve this.
Is the IAT sensor the same as my intake manifold mounted MAP sensor or could it be the charge pipe mounted one?
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Terry @ BMS's Avatar
Terry @ BMS Terry @ BMS is offline
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Default 10-20-2020, 01:58 PM


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blackhat75 blackhat75 is offline
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Default 10-23-2020, 11:40 AM

Terry, here's a log from a while back. It's a bunch of trash pulls around town but at least shows the IAT dips I'm talking about. Looks like it only happens during idle and decelerations. Actual pulls were/are fine. I'd like to try to clean the IAT sensor firstly. Just not sure which sensor is the right one. I remember there's a MAP sensor in the intake manifold AND one in the charge pipe(which is the N20, 3.5bar swap). Which one pertains to this issue? Would it hurt to clean them both?
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File Type: csv 20201017_1729_runs(7).csv (61.5 KB, 28 views)
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