Hey everyone, I'm trying to diagnose my 94 me-otter without resorting to the spendy parts replacing method... Anyway, it has had a "dead spot" in the rpm range at about 3250ish rpm. At first if you would rev it quickly it would just rev up normally and go right through the dead spot without any issues. But if you were driving under load in say 5th and hit that rpm point the engine would die and drop back to 3000 and then rev again. After driving it around a bit it stopped reving past 3250 at all. Then while trying to diagnose it, the car now will not rev past 2250ish rpm. It will rev normally for the very first few seconds of start up from cold. Which in Pittsburgh has been like 40 degrees and below. But after those few seconds it just stops revving past 2250. If you hold the throttle down it will rev to 2250, die, drop to 2000 and rev back up to 2250 and just repeat the cycle. I have replaced the Throttle position sensor, the entire throttle body with Idle air control valve( I had both of these parts from past good running projects). I just picked up a used Air flow meter from another grm member and the ohms check measured exactly the same as the one on the car and didn't help. I have done the led/resister blink check for the obd1 and it said air flow meter. The book says 2200 to 2900 ohms at 65 degrees, and the colder it is the higher the # and vs verse for warmer. Is the 2200 to 2900 the only range and if its out of it, its bad? Both of the ones I have read 3500 ohms but it was 45 degrees. Are these both bad? I am waiting till Tuesday to work on it as its very cold and snowing again 
. The other checks I have done, are to check the voltage going to the AFM, and ohm checked the IACV, and TPS. I still need to check the O2 sensor, and H20 sensor and I am going to check for continuity of all the wires from the ECM to the sensors. Is there anything else I can check? Any ideas? So far nothing has really measured bad that I can find. Is there a way to check the ECM???
Thanks for any help or ideas
Paul
