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Hi all
on my 3.0 petrol i have a bad misfire on 1-5.
first i got crank sensor code, replaced and code gone.
mixed up the coils and still got 1-5 misfire.
changed plugs and ran great for 1 mile then back
to 1-5 misfire.
got a code now p1250 fuel pressure regulator.
changed the vac pipes but no luck.
would this cause a misfire....
All this has been since two days after i changed the coolant
sensor because it would not cold start.

Forgot to say that i heard a pop from under hood before
all this started.

Thank you very much.
dave king
 
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