Question about Jaguar XJ8
I strongly suggest u NOT rule out fuel as the cause I think your reasoning is flawed, poor fuel quality can cause some cylinders to misfire and some not, suggest you purge the tank and refill it and purge all the fuel out of the lines, have 35 years of experience and have seen this many times over the decades, as a professional i see it as very odd this all started after filling the tank, don't U?
Posted on Jun 03, 2010
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Posted on Jan 02, 2017
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The P1399 random misfire along with one or more of these codes: P0301, P0302, P0303, P0304 -- indicates a problem with the valves. The B20 engines in the 1997-2001 CR-Vs are known to have problems with valves tightening and then 'burning'.
So the first question is when was the last time you adjusted the valves? If you don't know or never have, then have them adjusted. Soon...
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