can you help me :{
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can you help me :{
1997 f150 4.6 it misfires on #1 and #8. it shakes like crazy at any speed and idle. I have new plugs,wires,coil packs,and new injectors in those two. I have good compression,spark,and fuel. What could it be? no engine light on but pulled codes p0301,p0308,and p1151
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From: Trappe Pa
P0301 = Misfire cylinder #1
P0308 = Misfire cylinder #8
P01151 = Bank 2 Sensor 1 slow switching / no switching
Bank 2 is the driver side cylinder head and Sensor 1 is the O2 sensor closest to the exhaust manifold. Bank 2 contains cylinders 5,6,7,8.
If the engine is rough then this pretty much confirms a misfire.
Have you cleared the codes and does the engine run smooth once codes cleared.
P0308 = Misfire cylinder #8
P01151 = Bank 2 Sensor 1 slow switching / no switching
Bank 2 is the driver side cylinder head and Sensor 1 is the O2 sensor closest to the exhaust manifold. Bank 2 contains cylinders 5,6,7,8.
If the engine is rough then this pretty much confirms a misfire.
Have you cleared the codes and does the engine run smooth once codes cleared.
Postmaster
Joined: Oct 2003
Posts: 4,516
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From: SoCal
Lean misfire from a vacuum leak maybe?
Heres 2 of the pinpoint tests that I show for your missfire codes:
1 Vacuum leak in air intake system.
2 Fuel injector circuit malfunction.
Theres more, but these are the most likely considering what you have allready replaced or tested.
Have you checked for a vacuum leak on the intake runners for 1 & 8?
Heres 2 of the pinpoint tests that I show for your missfire codes:
1 Vacuum leak in air intake system.
2 Fuel injector circuit malfunction.
Theres more, but these are the most likely considering what you have allready replaced or tested.
Have you checked for a vacuum leak on the intake runners for 1 & 8?
Please double-check when posting.... thanks. 
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dave_1001
1987 - 1996 F150 & Larger F-Series Trucks
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May 24, 2008 10:11 PM
