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I also have problems with the idle, when it is cold, it run about 2000rpm, when it get hot it fall to 750. But when i drive a little trip, and stop for idle it goes up to 1100 and dont go further down.... If i start and stops the car the idle is perfekt 750... If i rev the engine it falls back to 75...

But i dont get any fault from the ecu anymore.

No i stille have the problem, i try change the o2 sensor, but dident change 2 much. But i dont know if there could be a problem with the new o2 sensor? The readings i get when i meassure it seems to be wrong, it says only 0,001 volt and do not change at all....

Yeah the 0,1-0.6 is fine, but it is the back o2 sensor, which is fine. But the front sensor only says 0,01 constant... And the 13volt is not the heater wire. It is the input wire....

what about the measurements??

Hi, i bougth a new o2 sensor, because the old was bad. If i use a volt meter and measurre the back o2 sensors blue wire, it says 0,1 - 0,6 continuous. But when i meassure the front it says 0.1 volt constant, both on the new and the old o2 sensor.? If i meassure the gray wire it says 13,4volt, on bot...

Okay, i have three sensors, ill post a pic later...

Again i tried to read out fault codes, and now the car report fault 15, bad o2 sensor. So i will bye a new one.

Yes i know one of the three is for temp gauge. And one for the fan...

My car has 3 coolant sensors. But thats the way i done it...

Now i check to front o2 censor, blue pin and gnd. It says -0,02 volt constant, and when i do the same thing on the back censor the volt continuous goes between 0 and 0,9. So i think that the front o2 censor must be dead?` My coolant temp sensor resistance(if its is the one with green connector) work...

In miles pr galon it would be, 12 MPG

Now i solved my start problems by adjusting the TPS. Now the car starts every times... Great... But i still think it gets to much fuel, it smoke a litle, and the smoke smells like gasoline.... The car also uses a lot of fuel. Its only drive 5km/l. (20L/100KM) I have testet the back o2 sensor, and th...

All vacum tubes look just fine.

I disconnet the intake rubber, and the throttle house is also very black inside... Just like the dirt in exchaust system...

When i unmount Throttle position sensor, the car start very easy, and also smoke a little lesser... Could it be broken? or is it something else...

I will start to sorry my bad English I bought myself a second MX3. It has a little start-up problems, both when it is cold and hot. It has no error codes in when i readout, I have changed spark plugs and air filter. Have measured the ohms on the ecu coolant sensor. And it looks like it is working as...