Mechanics

MISFIRE ON #5 CYLINDER

2002 Mazda Tribute • 89,000 miles

Compression down on #5 cylinder dealer wants to replace head hard miss around 45 mph car was not driven for a month after fueling car started to miss
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Pingisi
September 25, 2012.



Low compression does not necessarily mean a bad head and I don't see why it is necessary. It could be the valves or piston rings.

Since vehicle was not driven for some time, a little running might get the compression back.

KHLow2008
Sep 25, 2012.
Had to change coil and plug on that cylinder 4 months ago only started to misfire after filling fuel tank any other suggestions

Tiny
Pingisi
Sep 25, 2012.
Get another compression test and see if the compression is not up, try a wet test. The misfiring could be due to excessive fuel in cylinder causing the drop in compression pressure.

Are there any trouble codes and was the fuel injector checked/tested?

KHLow2008
Sep 26, 2012.
Mazda tribute low compression problems

don't brake you head just listen to the professionals and you will learn

have a compression test if fail don't waste you time, the time chain last a life time and 99% are the possibilities that you have a bad head or gasket problem, just a high price for not checking you fluids

enjoy

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Tiny
Luisponce
Nov 30, 2012.