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Old 10-23-2012, 04:40 PM   #11
shineboy
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Your wife makes a good point.

What I can't understand is why anyone would consider the purchase of a new Ford Focus when they are unable to get their existing Focus (which is under warranty) repaired properly.

Service is important.
part of the reason I traded the 2012... did not expect problems so soon with the 2013
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Old 10-23-2012, 07:13 PM   #12
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Un metered aid does not play havoc on a non MAF car... but point well taken! Code is actual fault with the sensor

The ST doean't have a MAF??
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Old 10-23-2012, 07:24 PM   #13
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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?
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Old 10-23-2012, 09:25 PM   #14
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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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Old 10-27-2012, 12:25 AM   #15
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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.
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Old 10-27-2012, 01:14 AM   #16
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knock sensor malfunction. I for some reason attributed it to the boost... lol.
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I had a spare tire go up in flames once, my truck was hit with an rpg though.
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Old 10-27-2012, 09:28 AM   #17
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The PCM still wants to know the intake air temp.
I agree... pretty sure it still has IAT sensor though
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Old 10-27-2012, 09:32 AM   #18
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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
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Old 10-27-2012, 03:19 PM   #19
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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.
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Old 10-27-2012, 03:21 PM   #20
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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.
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I had a spare tire go up in flames once, my truck was hit with an rpg though.
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