Jaguar 4-2 supercharged engine misfire under hard acceleration. Fault codes P0306 and P1314 shown. Any Ideas ?

Marvin

• 85242 Answers
• Posted on Apr 28, 2009

SOURCE: Fault Code : P1664

P1664 FIP (Fuel Injection Pump) malfunction (possible air ingress in low pressure fuel side)
Most likey the Diesel fuel injection pump needs to be replaced or overhauled.

SOURCE: 96 bmw 740il misfire

This is a pretty common problem. I would change your valve cover gaskets. They run around ~ 50 bucks. If they are bad it will leak oil into spark plug well and cause a misfire. Very known on the 740.. Also if tune was not anytime not too long ago id change spark plugs while you at it. Then clear the computer and if you still get misfire on 8 try changing the ignition coil which is right about the cylinder with cylinder ignition coil 5. clear the computer. if you get random misfire and misfire cyclinder 5 after then its your ignition coil. parts store runs around 100 bucks

SOURCE: BMW Z3 rough idle on start codes read P1189 , P0173

all the codes you have are all related to the fuel trim, this problem needs to be looked at with a european capable scanner for futher tests sorry.

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Mike LaPres

• 757 Answers
• Posted on Sep 04, 2011

SOURCE: code: P0306, Cylinder 6 misfire detected. Probable

The most probable cause of misfire on every gas powered vehicle is a worn spark plug.

Next in line to that is the spark plug wiring, followed by ignition coil.

Even if the plug is NOT worn, inspecting them will tell you the story of how the engine is operating.

Replace all of your spark plugs. The old plug from bank six will look different from the rest and will most likely smell like fuel also.

The codes you are getting pertaining to the oxygen sensors are the result of the engine misfire.

Marvin

• 85242 Answers
• Posted on Aug 08, 2012

SOURCE: 2001 ford taurus 3.0 v6 code p0306 misfire

Please go to this page for engine misfire causes.