Question about 2004 Chevrolet Tahoe
#5 cylinder missfire on this vehicle. swapped spark plug, wire, new cap and rotor. cmp ****** set to -1degree. clynder power balance cyl. 1-4 can disable, but cyl. 5-8 won't change missfire when diabled.
Customer had to previous shop and they changed dist. gear for some reason and spark plugs due to this missfire. Is it safe to say that the #5 injector plugged? But then why am I unable to disable the cyl 6,7 and 8. The scan tool also kicks out after disabling a few cylinders and have to start over. This is a GM Tech II scan tool being used. Thank you for any information and the promptness. Jason Anderson
How is the pressure in the fuel rail? a low pressure will cause erratic firing of the injectors - the further down the rail u get usually the worse the problem. If the fuel filter was not changed regularly or if the vehicle stood for a while, dirty fuel/standing fuel at some time in the recent past, this **** will accumulate in tyhe injectors. To avoid spending a loada cash, swap a few injectors around and see if the problem moves with the injector.
Posted on Jan 07, 2009
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