Volvo AWD 850 Forum

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Misfire 850

I have a problem that wehn my engine on my 850 estate gets up to full operating temperature it begins to misfire.

I am not getting any error codes.

The plugs are only 4 mths old , so I don't think its them.
Can't find any obvious vacuum leaks.

Any ideas?








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Misfire 850


check the condition of the ECT sensor and TB

chrisq








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Misfire 850

What gap are the plugs set at?
Should be .028

-Michael








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Misfire 850

wrong plugs?








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Misfire 850

Did the coil wire get changed when the wires were replaced? On mine, it was the coil wire that was the culprit of the misfiring.







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