PO171 and PO174 Codes
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#13
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Since it acts up especially when cold, it kinda makes me think it might be the tube in lieu of or with the EGR valve as the contacted metal when cold and expanded when hot just runs inn my mind. Can I check this with spraying the joints when cold startup or am I missing the actual testing for the EGR tube?
I guess I can check the connections and pull it to look at the internals, check the resistance between the EGR valve terminals, etc. But probably this is an old "throw a new part at it" kinda thing 'eh? I have had other Chevy guys I know with newer and fewer miles speak of replacing the EGR lines from the manifold as well as they seem to develop breaks and cause leaks which throws off the signals and in the end the computer alters the fuel air mixture.
Last edited by clanofwolves; December 18th, 2023 at 4:05 PM.
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Do you like cigars?
#19
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Haha, I have smoked a few in my life, but I found a shop with one and I know one of the guys so I went over and we used it at the end of a day. It showed a leak in the intake gasket on the passenger's side. I now have the gasket set and I will start the repair today. I'll advise when complete and I run her a while..