Hey Guys
I have a Waja 1.6, mitsubishi engine model 2005.
Today I was trying to check the fuse of headlamp but I took out the ECU fuse out by mistake, first the clock went 00:00 then the engine stopped working properly.
When the engine is idle, the RPM goes below 500 as much as the battery light goes on and the engine turns off!!!
Before it never went below 500 and in idle mode it was something around 800.
Then I read about reseting the ECU, so I took out the ECU fuse again for a minute and then put it back, clock went on time but the engine problem is remained???!!!
Does anybody know how can I solve the problem????

The ECU probably went back to default mode. Just give a little gas and drive normally for a few days.The ECU should relearn your driving style.

if not mistaken Waja need to be retune with the OBD-II scanner. just go to any workshop that have the scanner.

give it 3-4days max for the idle to reset itself, or else contact me and i'll recalibrate all the sensors again

Wait, waja mitsu engine or waja campro

waja mitsu is cable throttle, waja campro is drive-by-wire

big difference in problem and solution

written mitsu?

ok missed that part.

then it's the throttle body, cable throttle is not affected by ECU.

you sure? Then why is it that after i clean throttle bodies, rpm rises up to 1.5k eventhough I adjust to minimum idle valve opening and I have to reset the ecu to let it sit at 850rpm again and reopen the idle screw for a 4g18 engine?

i think ur throttle body.... u need clean the throttle body and u need to readjust ur ECU to adjust the throttle angle....

resetting ecu will not resort to adjusting of the throttle angle. That is tps related, mechanically done

Because the dirt clogged up the idling passages and some bright spark just decided to raise the min idle valve to compensate instead of properly cleaning the TB

then when you cleaned it of course the rpm is gonna jump because it's getting more than enough air

so it IS ecu related if it's some "bright spark"

my friend 'bright spark' is slang term for 'some smart guy'

so when i clean the tb, rpm rises. I close the idle valve to the minimum and it still idle at 1.2k - 1.3k rpm. I have to reset the ecu, reopen the valve at least 3quarter of a round and it falls to 850rpm.

Wheres the sense in that? Or what would YOU do if the car still idles that high after idle valve has been closed fully?

Bright spark.. now I get you. Be straight forward please

you turn the wrong way ?

first you close didn't work then open only drop. maybe the screw also full of dirt

this.

happens to my mitsu waja several times, especially when removing the battery for prolonged time. just give it 2-3 days it should go back to normal

do you think im stupid enough to turn clockwise to 'open it?'

I open it after resetting the ECU by plugging in the laptop, letting the ISC stepper motor sit properly, letting the ISC step down one by one down to 6-7steps from the 50steps after resetting the ecu. If it's fully closed, of course the car can idle but the ISC step has to compensate the opening idle valve in the throttle body and this my or may not lead to high fc and funny idling fluctuation when aircond and radiator fan is switched on or off. And YES, it is ECU related, not entirely mechanical. The car can idle if the idle valve is fully closed as the ISC motor below the waja throttle body opens at a high step to allow more air to bypass the butterfly and idle valve. By resetting the ecu, you will get to recalibrate the ISC valve and re-open the idle valve screw(yes, CLOCKWISE IS OPENING. Im being sarcastic).

so, you were saying?

your story changing like the wind, first is about idle screw, now there is stepper motor.

doubt you familiar with the correct sequence to adjust idling

they're all related. Since you doubt me, why dont YOU tell me your way?

Lols there is some misunderstanding here..... anyway Mitsu engine had diffrent method of idling system... if you know how to go to SAS mode and understand what is "9 Step" on the stepper motor... then u understand how the systems works...

Others method might also work... eg: adjust the air Valve during engine off condition... this is the way to cheat the ECU but yet it is not the best way because it might increases the Step.