Question about 2004 Ford Focus
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Posted on Jan 02, 2017
SOURCE: IAT sensor
The IAT (Intake Air Temperture) is the sensor that measures the temp of the incoming air to the engine, it is either in the rubber hose to the engine from the air filter housing, or on the air filter housing itself, it is small and round with 2 wires going to it, many times it is left unplugged during routine maintenance.
Posted on Oct 09, 2008
Save your money, the chip is a ohm resistor at Radio Shack for under $2.00. It splices in to you IAT wire harness located at the intake tube between the air filter housing and throttle body.
Problem with this system is, that you can not adjust anything and have to run a constant 91 octane just to make sure you do not have a Detonation. The ECM will catch the Detonation from the knock sensor and compensate for it by retarding the timing which in turn lose of HP till next start up.
If you like and don't mind the check engine light on once and awhile, you can do the same by just disconnecting the IAT wire harness which give the ECM a 0 resistance thinking it's -20 out side and turn the timing up and lengths the injector pules.
When i was running a Nitro in the Toy before i sold it, i had installed a 10K ohm Potentiometer which you can buy at radio shack for under $5.00 i believe, I just spliced it in to the IAC wire harness so if i wanted to play with the Nitro I'ld turn the resistor up making the engine think it's 185 degrees F and would ****** the timing so i would not hurt the engine. But if i wanted to get more timing i would just turn the knob to drop the resistance to get more time since the engine thinks it's -20 out side.
Hope this helps. Keep me posted if you need more info. Best thing is to do a dyno tune and you can change everything right down to the Shift points.
Posted on May 29, 2009
SOURCE: ford focus rs alarm trouble
if its a factory alarm you put the key in and quickly turn the key on and of i cant remember if its 8 or 9 times but the horn will chirp then you push the lock and unlock on the fob the locks should respond then turn key off and your done. note that if you have more than one fob you have to press lock and unlock on all of them before you turn the key off and i believe you only have about fifteen seconds to do so if not let me know i will look it up at work
Posted on Sep 14, 2009
SOURCE: wire colors for my IAT sensor
red with blue stripe and black... cut the red with blue strip and connect one end of the resistor to the harness side. Then splice the other end of the resistor to the black wire... do not cut it just splice into it.
Posted on Dec 21, 2009
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