IAT replacement with a patontiometer

mezomaster · Post by **mezomaster** » Wed Jul 18, 2007 12:24 am

well, i think that was the reason, since i've replugged the O2 sensor plug and the CEL doesnt light on anymore....THX GOD

TheSage · Post by **TheSage** » Wed Jul 18, 2007 6:36 pm

MMamdouh wrote:you can use a multymeter to read the sensor's output i guess... or if you have a diagnostic tool you can get the temp reading on the display.

what you are trying to do was done before in the chocochip in the attempt to increase prformance by fooling the ECU and give it false input about the intake air temp and make it think it is cold as hell outside... good idea so far but it is not the whole story.

once the ECU starts to dump more fuel to cope with the colder, much denser, oxygen loaded air by increasing the injector pulse time and the mixture is going to be rich... the ECU is going to detect the rich mixture through the O2 sensor and accordingly will reduce the injector puls time once again.

it is a closed circle were the mixture has to be arround 14.7:1 which is the best ratio for a N/A engine to make power... trying to mess with the ratio will not gain you power so you better rais the engine effecency - turbo it - rather than messing with the sensors.

a long story short... this is not a good idea

MMamdouh

In theory though, if your engine was running lean during acceleration (open-loop situation), this could help you richen that up for stability. If I was going to do a mod like this (I wouldn't), I would wire it to a relay with a wide open throttle switch so it was only toggled on when the ecu determined in increase in engine load.

MMamdouh · Post by **MMamdouh** » Mon Aug 06, 2007 9:31 am

make sure the O2 sensor is well connected... and it is better to get the car scanned and the code retrived rather than speculating the problem

MMamdouh

mezomaster · Post by **mezomaster** » Mon Aug 06, 2007 10:04 am

I am going to scan it MM, i found a service center in El Kasr El Ainy, (it's name is (EL MOBTADEYAAN), he got the scanning tools, and he do that for 25LE., if u wanted more details about its place, its in the same street of(ROZ AL YOUSSEF) magazine, he got Hyunday also.

MMamdouh · Post by **MMamdouh** » Mon Aug 06, 2007 10:18 am

i know that service center... actually i live 10 minutes away from it

MMamdouh