need help with idle problem

i have a 2002 toyota tacoma 2.7 4wd 5speed it kept throwing a p0505 code which is IAC valve i took it off replaced it cleaned the throttle body hooked everything back now when i start the truck it idles abotu 1500rpm no check engine and no codes also checked for vaccum leaks and found none i lightly pecked on the MAF sensor and the truck went wild idling up and down pulled the top of air box off truck idled down fine but if it block the sensor it would flood the truck and die remove the block start it back and it still idles high.. any ideas need help asap thanks

 

Maybe try resetting it? Unhook the battery for a while. then hook it back up and run it.

 

i have a new MAF sensor to put in it in the morning im going reset the whole system after i hook it up and try that. if the problem still arises im going drive it about 30-40 miles and see if the computer will just adjust to the new sensors

 

I just posted my solution for this in another post for someone with a similar issue, it's for my '03 Jeep Wrangler, similar sensors etc - I'll report it here:

"I have been having a idle issue with my 4.0l, it would idle between 1300-2000 but usually would hover around 1500. I cleaned the IAC, throttle body and harness connections to the sensors ( MAP, TP, Air temp sensor). I hooked up my ODB and I could see that the TP was sending the correct signal. Then I checked all the vacuum hoses using the carb cleaner method (with the engine running, spray it on all the vacuum hoses and see if the engine rpm change). I still had the issue, after pricing the sensors I decided to just start replacing them since they didn't cost that much, I also opted for Mopar since the chinese ones were getting mixed reviews. I got the IAC for about $50 but nothing changed after I installed it, next was the MAP($65) and that fixed the issue. I also learned a MAF sensor has the air temp sensor built in while a MAP sensor uses an external air temp sensor. The air temp sensor would have been my next item to buy. The only thing I would have done different is to have bought the MAP first, it is usually this guy that fails"