Won't idle correctly

LeifGrouttzof · Post by **LeifGrouttzof** » Sun Jul 20, 2014 6:27 pm

I unplugged the airflow meter and it gave me two new codes. Two outputs maybe?
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popup · Post by **popup** » Sun Jul 20, 2014 9:41 pm

Could that be 01100 and 11100? I found a list of codes here but I don't know if they are relevant http://www.evoscan.com/technical-vehicl ... iagnostics

LeifGrouttzof · Post by **LeifGrouttzof** » Mon Jul 21, 2014 11:25 am

Hmmm they don't seem to match up. Looks like it's plan B. Testing every sensor's output at the ecu

coop1er · Post by **coop1er** » Mon Jul 21, 2014 5:19 pm

How are you reading the code?

The correct way is to turn ignition on and read the code with a volt meter. An analogue meter is the best to use.

If there are no codes it will just show 12v. If there are codes, it should start with the lowest numerical code 1st. Flash on for 0.4 seconds, flash off for 0.4 seconds etc. There will be a break of 2 seconds between codes with no voltage.

Fault codes are :
1) O² Sensor
2) Ignition signal
3) Air flow sensor
4) Pressure sensor
5) TPS
6) Motor position sensor
7) Coolant temperature sensor
8) Vehicle speed sensor

O² sensor needs to be checked with engine hot and running. The Air flow sensor can be forced to throw a code just by revving the motor - it doesn't necessarily mean there is anything wrong with it.

LeifGrouttzof · Post by **LeifGrouttzof** » Tue Jul 22, 2014 11:08 am

I am using a led testlight. It's flashing different sequences with a gap with no flashes for about three seconds and then a different sequence of flashing starts.

ProZac · Post by **ProZac** » Tue Jul 22, 2014 11:31 am

coop1er - That method of checking the codes, and those codes are for the later mode SOHC 8V ecu's. The DASH 12V stuff is pretty different afaik.

coop1er · Post by **coop1er** » Tue Jul 22, 2014 1:50 pm

Well you could be right. I have to admit that I have never checked for codes on a dash engine.

However there are still some things in my post that are relevant. For instance I would only check for codes with the ignition on and not running. The code list is probably correct. The only thing that a dash engine has that a sohc doesn't is a solenoid for the extra valve.

Binary codes are pretty rare, but they exist normally in the format of:

Some early Mitsubishi binary codes:

Another thing that you could do is clear all the codes by disconnecting the battery, then map out the codes by disconnecting sensors one at a time until you get a full list.

niss720 · Post by **niss720** » Tue Jul 22, 2014 2:50 pm

Very clean engine bay you have there looks good :beer

LeifGrouttzof · Post by **LeifGrouttzof** » Tue Jul 22, 2014 3:36 pm

Thank you coop1er! I've been looking for something to tell me how to read these damn pulses. I had found a list of codes but nothing on how to read them. From memory I'm sure that one code is definitely the oxygen sensor but I'll look into the others later.

Oh and thanks to niss720 it took a bit of scrubbing and isn't quite done yet.

ProZac · Post by **ProZac** » Tue Jul 22, 2014 6:38 pm

coop1er - that is a damn invaluable image, really explains it clearly, cheers.

The DASH ECU's are a little different, they control the spark timing, for example.

Austarion

Won't idle correctly

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