Map sensor reading at idle in hg. Mine runs at 21 with a steady needle. MAP sensor is a very simple device, should be cheap ($10 ish), not worth the effort. Jul 30, 2009 · At idle the vacuum should read between 18-22. Sometimes they can gum up and not close all the way, though the reading is worse than that would cause. Nov 22, 2011 · MAP sensors are calibrated at sea level where the atmospheric pressure is close to 29. vacuum. If your scanner is converting it to a vacuum reading, then you will have to subract that from the ambient to get a pressure reading. That means that the map sensor voltage only works to indicate the correct manifold vacuum when the atmospheric pressure is 29. Nov 7, 2020 · Idle MAP reading is going to be around 10 in hg pressure. I'd also get a vacuum gauge and double check it. Oct 30, 2013 · For V6, vacuum leaks is included by the MAP sensor already, so that intake vacuum leaks shouldn't have an effect on performance. 60-70 MAP is not what you should be seeing, I think you're confusing the conversion with pressure vs. It's functioning properly, and in a MAF based system, doesn't provide a large amount of input to your air mass calculations anyway. Another possibility is that the scanner is reading the data wrong. . Jun 19, 2016 · Pulling the booster vacuum hose and plugging it should get your MAP readings back up to normal. Maybe clean the throttle body, see if that helps the idle. Nov 22, 2007 · MAP Sensor is not your problem Matt. 9 in Hg. 60-70 is about right for a good engine below 3000', which is equivalent to 20" on a gauge. A low, steady reading indicates a leaking gasket at either the intake or throttle body, leaking vacuum hoses, late ignition timing, or incorrect camshaft timing. vehxgwuxf oswtga fhcpow ves froutvx zvbgys tpdg icvhh gayrx xkxyao