Mechanics

MISFIRE CONDITION

2004 Chevrolet Epica • 99,000 miles

I am a Mechanic from Ont. Canada. I am working on a 2004 Chev Epica with aprox. 99 000kms with the complaint of "lack of power" Aprevious attempt to repair the issue was preformed by doing a tune up. The plugs (NGK), coil boots, fuel and air filters, bank2 sen1 02 sensor were replaced. Launch scanner revield missfires on #'s 3, 4, & 5 cyls and a PO158 voltage high on bank 1 sen2 O2. If this code is set the missfire disappears. If the codes are cleared, the missfire redevelops untill the code sets again? What is the probable cause
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MrMechanic1968
July 31, 2011.



Inspect and test the crankshaft position sensor and camshaft position sensor-

Also go to this link: http://www.2carpros.com/articles/engine-misfires-or-runs-rough

Rasmataz
Oct 2, 2011.
Hi, do you resolve your problem with your epica?

I have the same problem since 3 week

Thank a lot

Tiny
S23599e
Nov 1, 2011.