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Knock Sensor after timing belt replacement
Posted 03 January 2006 - 08:04 PM
i've done the following over the last week and am just about at my limit.
replaced the following:
Valve cover gastkets
Plugs (from Bauch to NGK)
up stream O2 sensor
Down stream sensor
now the CEL show a knock sensor error or short.
car runs well at idle, slow to accelerate, bogs down on speed. cannot get the RPM above 3200 .
so i'm thinking either i've miss a tooth on the belt, which makes no sense to me since it runs well at idle. or there is something obvious that i've missed. can anyone tell me what they think? thanks
Posted 04 January 2006 - 08:22 AM
1. At what point during your servicing did the knock sensor code appear?
2. At what point did the engine begin to idle real good, but not rev above 3200?
You gotta determine whether the above problems are related to one single mistake you made, or unrelated symptoms of two separate mistakes. Maybe one is completely unrelated to anything you've done.
Check the connection to the knock sensor, maybe you knocked it off.
I know the DOHC motors can be a chore to do a timing belt on, but the SOHC aren't too bad ...just keep the marks lined up vertically. It helps a lot if you highlight the 3 marks on the block, highlight the mark on each of 2 pulleys /1 gear, and highlight the 3 marks on the belt ...all with yellow paint.
A clogged cat can limit power and RPM the way you describe.
Posted 04 January 2006 - 09:29 AM
ask to the retrace of steps. once i replaced the belt all CEL where out. therefore, i can only assume that the Knock Sen was working. i've check the connection and the wires running to the sen and they look ok.
What i'm wondering now is; if the sen is working correctly then the CEL would light if there was a problem not with the sen but with engine? make sense?
Posted 04 January 2006 - 04:01 PM
The first time I replaced a timing belt was on my former Loyale.
The timing was left retarded (and was later corrected at the distributor).
The symptoms were very close to yours. The engine idled perfectly (even smoother than before) but the car had no power.
Maybe your belt is one tooth off and the ECU "thinks" it's the knock sensor's fault.
Posted 04 January 2006 - 04:06 PM
The same thing happened on my brothers Legacy 2.2.
Pull it back apart and reset the timing. Good Luck! Using the factory belts with the painted timing marks makes it much easier to time correctly.
Posted 04 January 2006 - 07:14 PM
Posted 09 January 2006 - 10:47 AM
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