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Old 07-07-2018, 04:20 AM   #1
Join Date: May 2018
Question Volvo 940 Missing when Idle

My Volvo 940 with a B230FK engine has started to miss when idle.

When driving it sound and feels fine.

I have narrowed a few things down so far:
It is the cylinder closest to the front which is missing
The plug that came out was black and sooty unlike rest ( I replaced this with a new one )
Replaced the distributor
Tested the leads for spark and are all good

The things I have changed on the Vehicle since I got it:
Swapped airbox for a cone filter with heat shield.
replaced spark plugs with new NGK's ( was Bosch plugs before )
replaced oil ( 10w-40 ) and oil filter

I am thinking of changing the ignition coil next, any ideas what this could be?
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Old 07-07-2018, 11:21 AM   #2
John V, outside agitator
Join Date: Mar 2005
Location: Sleezattle, WA, USA

Look around..
If it's missing, it can't get far if it's just idling.
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Old 07-07-2018, 03:55 PM   #3
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Nayo's Avatar
Join Date: May 2011
Location: San Diego CA

removed your injectors probably dirty and is free to check
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