Misfire on #5 cylinder

PINGISI

MEMBER
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

Tuesday, September 25th, 2012 AT 8:47 PM

4 Replies

KHLOW2008

MECHANIC
41,814 POSTS

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.

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Tuesday, September 25th, 2012 AT 9:07 PM

PINGISI

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2 POSTS

Had to change coil and plug on that cylinder 4 months ago only started to misfire after filling fuel tank any other suggestions

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Tuesday, September 25th, 2012 AT 10:55 PM

KHLOW2008

MECHANIC
41,814 POSTS

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?

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Wednesday, September 26th, 2012 AT 4:46 AM

LUISPONCE

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3 POSTS

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

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Friday, November 30th, 2012 AT 2:04 AM