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I replied Dec 21 at 10:07. My first discription is Dec. 16 at 15:28 and you replied same day at 21:52.
checked vacume, after engine warmed up, idle 700 rpm- vacume 15.5 steady needle. Ran poorly on cold start, kept rpm's at 2500 until warm, then it would idle on its' own. Cleared P0110 IAT, drove 6 miles on slight incline, engine would miss erratically under a load, smooth down hill. Rechecked codes- P0110 IAT, ran at idle- reset idle speed to 800 rpm, ran for 10 minutes at idle...THEN idle dropped, engine ran poorly, tried to accellerate, acted as if running on 4 cyl., hard to rev up, won't hold idle- would die without throttle. This is repeatable- after car has run for 20 to 30 minutes and has been test driven for codes and performance check, would let idle- performance appeared normal. Then as if something overheated or 'switched off', suspect partial electrical failure to engine controls, would drop idle and die if not reved up- and revs weak and not all cyls, would drop revs on its own if held at 3000 rpm. Can restart and start the process all over if car sits for a while, (cool down). does not over heat.
Removed ECU and inspected for 'burn or hot' spots on grid- no visual signs of failure. Grounds at ECU good.
Appears to have a partial failure issue on cold start, engine would run better warm, misses on load, then after 20 minutes-a performance control would break down to a full failure.
Again, new dist cat, rotor, wires, plugs, MAF unit (w/ bar. and IAT). Retired auto tech 40 yrs exp. and fustrated!
