Quote:
Originally Posted by ChopperCharles
I already waved an unlit propane torch around the intake, with no change in behavior. One of those big brush-clearing torches. It's enough propane to stop an EX500 motor in under a second when waved around the airbox intake. And nothing budged on my RX3.
Charles.
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Then you can be reasonably sure that you don't have a vacuum leak; knowing this you will be able to have confidence in evaluating what the diagnostic software tells you via the DTC PID values.
In relation to testing the sensors specifically; if you are at idle, which creates high manifold vacuum, yet your MAP sensor has a high voltage reading - indicating low vacuum, like an engine running under load; then you have a bad MAP sensor. The situation is similar with the O2 sensor - give the throttle a couple of quick snaps while watching the O2 sensor voltage readings - they should vary up and down. If yours don't budge, then the O2 is bad.