code 12

[obx tsi]

just getting engine back in car and hooked up logger to check things. i knew that before i pulled the motor i was getting a cel, so before i get running again i thought i would check to see what it was. turns out to be code 12, airflow i believe? any way, is this normal without the car moving or is it a problem with the mas? also my tps shows 5 at idle. is the tps adjustable or is it just bad? will get a running log when i get the axles back in the car. thanks.

 

[t0ny007]

Check your biss screw and try adjusting that. If not then try to adjust your throttle cable. This is just possible fix for the tps being at 5%.

 

[obx tsi]

adjusted tps by turning it. it is now at 1.5.

 

[steve]

How are you coming up with your TPS values? On a 1G the TPS should be outputting about 0.5v or 10% on the datalogger with the throttle closed.

Steve

 

[obx tsi]

mmcd on a palm. it is at 1.5% and now has a good idle of 750-820. you say it should be at 10% during idle. well at 5% my idle was up and down, but hey everyones car is different.

 

[steve]

The TPS setting doesn't directly effect the idle speed.

The factory spec for the 1G output with the throttle closed is 0.48v to 0.52v which equates to 9.6% to 10.4% as displayed by MMCd. You should get a CEL for the TPS if you drive the car around set like yours is. We'll see what happens.

Did you resolve the cause of your 12 error code?

Steve

 

[obx tsi]

no i have not resolved the code 12. plan to change mas with another one that i have and try that. as for the tps %, thanks for the correct number to go by with my palm. i will try to set it at the numbers you stated and see what happens. thanks.

 

[obx tsi]

when using my palm to log, the isc is always at 22.6%. why? the isc ohms out ok and i have tried another, no change. tps is 9.7% at idle now. the baro also stays at 14.37 psi. also wondering about tima and what numbers are normal at idle, what is to high or to low. thanks.

 

[steve]

Make sure that you have selected the english units on the options menu.

Try reading these to start.

http://www.vfaq.com/TMO/
http://www.hywell.org/plhelp/

Steve

 

[obx tsi]

my code 12 was coming from the wiring of an afc that is no longer in the car. when i removed the wiring from the ecu and cleared the code it was ok.