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Thread: New ST already throwing codes... Reply to Thread
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Topic Review (Newest First)
10-29-2012 09:19 PM
shineboy
Quote:
Originally Posted by Kabigon View Post
The mk3 Focus (and especially the ST) has a lot of electronics. Sometimes it is just the luck of the draw.

Hopefully, it's as simple as replacing the sensor.
Replaced 10/27... so far so good
10-29-2012 01:28 AM
Kabigon
Quote:
Originally Posted by shineboy View Post
I hear you but dang less than 800 miles don't really expect any issues!
The mk3 Focus (and especially the ST) has a lot of electronics. Sometimes it is just the luck of the draw.

Hopefully, it's as simple as replacing the sensor.
10-28-2012 11:47 AM
shineboy
Quote:
Originally Posted by Kabigon View Post
Think of the knock sensor as a microphone that is tuned to a specific frequency.
Even when the engine is running normally (no knocking/pinging), it has a certain amount of output.

If for example the knock sensor had no output while the engine is running, the PCM will see that as a bad sensor.
I hear you but dang less than 800 miles don't really expect any issues!
10-27-2012 04:21 PM
mikebontoft this is true, that's all it is. you can trick or at least used to be able to trick a knock sensor to test its abilities by tapping on the block with the right tool.
10-27-2012 04:19 PM
Kabigon Think of the knock sensor as a microphone that is tuned to a specific frequency.
Even when the engine is running normally (no knocking/pinging), it has a certain amount of output.

If for example the knock sensor had no output while the engine is running, the PCM will see that as a bad sensor.
10-27-2012 10:32 AM
shineboy
Quote:
Originally Posted by mikebontoft View Post
knock sensor malfunction. I for some reason attributed it to the boost... lol.
It is weird, 2 out of 3 times I filled up with gas (93 octane) and the light comes on when I restart. I am in Ford service today and the the service guy told me that check engine light tend to be knock sensors or catalytic converters on Ecoboost....we will see
10-27-2012 10:28 AM
shineboy
Quote:
Originally Posted by Kabigon View Post
The PCM still wants to know the intake air temp.
I agree... pretty sure it still has IAT sensor though
10-27-2012 02:14 AM
mikebontoft knock sensor malfunction. I for some reason attributed it to the boost... lol.
10-27-2012 01:25 AM
Kabigon
Quote:
Originally Posted by scottso View Post
If it doesn't have a MAF then what are the wires for that connect to the intake tube immediately after the air cleaner box?
The PCM still wants to know the intake air temp.
10-23-2012 10:25 PM
shineboy
Quote:
Originally Posted by Focus112 View Post
The ST doean't have a MAF??
Nope... 3 MAP sensors. Still did not like the idea of unfiltered air going in

http://www.focusfanatics.com/forum/showthread.php?t=300255
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