What should MAP sensor read with scanner?
I have been attempting to diagnose my '97 Jeep Grand Cherokee and find out why I am getting the random misfires and sometimes cyl 1, 4 or 6 misfire. The Jeep doesn't seem to be running bad, just the codes. And according to my scanner they always occur at 1,856 RPM, usually at 63 mph.
What should the range on the MAP sensor be with the scanner? For the last four codes the reading has been 44, 35, 46 and 47 kph. With the ignition on but the engine not running with the scanner connected the reading is 99 kph. With the engine running in park the number sits in the high 30's and drops when I increase the RPM's. Elsewhere on the web I have seen that the number should increase as the RPM increases.
What should the numbers be for the MAP with the scanner? Just trying to do some diagnostics before I take it to a shop. It just seems a little strange that the code always appears at the same RPM (1,856 rpm).
So far I have replaced plugs, wires, cap, rotor, then an OEM distributor assembly (distributor, cap, rotor, cam sensor) due to a worn bushing. The injectors are new, and the coil has been checked. The engine was a new engine installed about 10,000 miles ago.