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Old 01-20-2017, 04:31 PM   #1
patmappas
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Join Date: Nov 2016
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Misfire on all cylinders

Hi guys
I have misfire codes
PO300
PO301
PO302
PO303
PO304
PO305
PO306

I have an engine knocking and it sounds like it's coming from the intake manifold. I think what happens is one cylinder misfires then they all. I've replaced the Disa and CCV lines which took care of the lean codes I used to have. I've also replaced the MAF. Any ideas on how I should diagnose this problem? I can also post a log.
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Old 01-20-2017, 04:52 PM   #2
Bigc2016
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Old 01-20-2017, 04:59 PM   #3
CylonRed
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See this thread for what you need to do:

http://forum.e46fanatics.com/showthread.php?t=1120859
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Old 01-20-2017, 05:00 PM   #4
Dave1027
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If the knocking is coming from the intake manifold I'd suspect the disa. You should pull it out and give it a good inspection.
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Old 01-20-2017, 05:02 PM   #5
jfoj
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What happens when the MAF is disconnected??

Did anything change when the MAF was changed?

Brake booster leaks do not get picked up with a smoke test.

What is the MAF value @ idle?
What are the Fuel Trim values @ idle?
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Old 01-20-2017, 05:18 PM   #6
patmappas
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When the Maf is disconnected the idle changes. I drove around with the Maf unplugged for 10 minutes and afterwards check OBD fusion and had pending codes for all cylinders but no actual confirmed. I plugged the Maf back in while the engine was running and the car died. Turned the car back on with Maf connected and let it idle for 2 minutes and the the codes came back on confirmed

The car idled smoother than before since I've had the Maf replaced

Here's my log
https://www.dropbox.com/pri/get/Apps...LJFnwi-v2r4pNg
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Old 01-20-2017, 10:19 PM   #7
swordsman11868
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Quote:
Originally Posted by patmappas View Post
When the Maf is disconnected the idle changes. I drove around with the Maf unplugged for 10 minutes and afterwards check OBD fusion and had pending codes for all cylinders but no actual confirmed. I plugged the Maf back in while the engine was running and the car died. Turned the car back on with Maf connected and let it idle for 2 minutes and the the codes came back on confirmed

The car idled smoother than before since I've had the Maf replaced

Here's my log
https://www.dropbox.com/pri/get/Apps...LJFnwi-v2r4pNg


That link didn't work for me...
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