Hi guys, got a version one import WRX and it showed error code 22 (knock sensor) That has been replaced and went to reset ecu but will not fire up??

Car has got fuel and has spark. But am i right in saying the knock sensor retards/advances timming?? would the timming be the cause of not starting?? or could the KS be faulty?? any help would be brilliant Ross

 

The knock sensor should not affect the car's ability to start - even with a knackered or disconnected sensor.

As you say the ECU can adjust the timing and other parameters based on knock input, but, in the absence of any signal it will just carry on as normal. It won't be receiving any during startup and idle anyway so this is a red herring.

I would suggest that you start checking to see if you've accidentally disconnected or broken any other electrical connections while changing the sensor. Take it that it's turning over as normal on the starter?

 

yea no funny noises or nothing. Has good compression, fuel and spark. dont know what it could be??

 

If it has compression, fuel and spark, are we to take it that it's turning normally on the starter, and occasionally firing, but won't catch and start properly, or...?

 

Does the car have an immobiliser.

 

It doesnt want to fire at all. and does turn on the starter fine.


Its a jap import so i dont think it has. Also it doesnt have an aftermarket immobilser ethia.

cheers guys

 

mine done the a week ago same after 3 days it worked fine think i flooded the engine