seangolden1983
TYF Newbie
- Joined
- Mar 27, 2017
- Posts
- 10
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Howdy I have an 06 Yukon XL 1500 4x4 and I have been trying to figure out a misfiring on all cylinders when the air conditioning is off when on they stop soooo yesterday I hooked up to battery to check voltage all is fine but when engine running if I turn air on to engage the coolant fans it acts normal but when I turn the air back off the voltage shoots up to 15.25 then the misfires start I dunno but could this be bad voltage regulator any ideas are welcome thanks.