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#5 cylinder wont fire

A mid-size luxury crossover SUV, the Volvo XC90 made its debut in 2002 at the Detroit Motor Show. Recognized for its safety, practicality, and comfort, the XC90 is a popular vehicle around the world. The XC90 proved to be very popular, and very good for Volvo's sales numbers, since its introduction in model year 2003 (North America). P2 platform.
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steph+
Posts: 2
Joined: 18 August 2011
Year and Model: XC90 2004
Location: Pennsylvania

#5 cylinder wont fire

Post by steph+ »

my 04 xc90 with 2.9 T6 is missfiring. although all coil packs check out --the # 5 coil is not receiving a signal to fire.
The spark plug shows no signs of being wet so I do not believe the injector is working either. I was told the injector and the coil are separate issues. I hope it is not the ECU.

Please advise if anyone can help.
thanks
steph+
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jimmy57
Posts: 6694
Joined: 12 November 2010
Year and Model: 2004 V70R GT, et al
Location: Ponder Texas
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Post by jimmy57 »

How was the lack of coil signal determined?
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steph+
Posts: 2
Joined: 18 August 2011
Year and Model: XC90 2004
Location: Pennsylvania

Post by steph+ »

I swapped the coil with other cylinders and it fired. I determined this by pulling the coil pack from the installed plug and inserting a spare plug into the coil and grounding the plug. When the engine was cranking a spark was noticed on all cylinders but the #5.
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