please go back and look at my reply- we started question 12-16-14, you answered 12-16-14 at 21:52
1997 hyundai Sonata 3.0 IAT code problem
Added again more info today 12-29-14

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!

Did tune up-Dist. cap/rotor/wires/plugs.96k miles. Ran 1 week ok then dead hole miss. Compress check-ok, rechecked wires, cap, rotor, plugs-ok. #5 is dead miss. Replaced 1 injector #5. Runs on all 6 but poorly at idle and lower RPM's. Has IAT code and bank 1 misfire. Replaced the MAF with new. Still has IAT and bank 1 codes. My manual shows 3 connector for early ecu's, and large single connector for later model ecu's. But I have 4 connector ecu. I am inspecting continuity on the 2 IAT wires. Any other suggestions and wiring diagram for a 4 connector ecu? Alread did check for vacume leaks. And has always had lite ruff idle from egr switch-put BB in vac line to EGR and passed smog-idle tolerable.

I need to replace the CV drive shafts in a 3L V6 sonata with an auto transmission. what is the corect method of the shaft removal?

i have everything apart n cant seem to figure out where the release pin is to get the cylinder out

I have a 1997 hyundai sonata and need to replace the side mirror. How much does it cost to get the repair done

I need a diagram of the transmission. Going to a pick-n-pull and I have no idea exactly how to take it out and what all these components are that I also need to disconnect and where they are located.

I can not get the driver side door to open with or with the key. When I press the unlock button all other doors open but not the drivers, the button on the door does not go down, and you can hear the motor but nothing happens.

When I turn the key to start the car it will only click. Then one day it will start. I have changed the fuses, battery and still does same thing. Went to Autozone and had it check Code PO443 came back, Purge/vent solenoid circuit condition.
Purge or vent solenoids defective, where do I find these thing. and can they to repaired or replaced.

I would like to know where the fuel relay switch is located.