PUNKLOVE315

So I hooked up to the one in the front behind the timing cover and it is reading 5.94 in the 20K scale. Would I be right in thinking this thing need to be replaced? Thanks

Anyone ready for another on of these? 1988 Nissan Pathfinder SE 188000 Miles with manual transmission and California emissions. Engine code 12 Air Flow Meter and sometimes 11 Crank Angle Sensor. Fires right up and presents with excessive black smoke billowing out of the tale pipe and a low loping idle. If the throttle is applied it will stumble up to high RPMs. I can only run it for about 20 minutes until it completely fowls the plugs misfires and stalls. I cannot get the engine to temp to test the fast idle cam or do the FSM's voltage test for the mass airflow sensor. Do any of you know if the engine temp will affect the MAP voltage output? Also when the MAP sensor is disconnected while the engine is running the engine idles up to about 1500 RPMs and stabilizes. It also leans out the engine and my exhaust smoke clears and appears normal. Is this only because the system is reverting to preset levels. Could it still be another sensor causing the issue that is disregarded once the engine enters fail safe mode? Things I have done so far. Compression test: OK. Fuel pressure regulator disconnected and vacuum applied: No change. O2 sensor replaced: No change. Crank angle sensor replaced: No change. Air flow meter cleaned and O ring replaced: No change. Fuel Injector O rings replaced: No change Vacuum lines inspected found one leak and repaired: No change. General tune up engine timing included: No change. Any advice or input is greatly appreciated. I could really use the help. Thanks, Brett Rome NY