My 2008 Colorado crew cab 5 cylinder runs like crap at idle.
What is your question?
it has 145k miles, just started. Oil always changed on a regular basis. I know I have a cracked exhaust manifold, but I'm in Florida and never open the windows. also the exhaust tip is black, no sign of leaking oil as it stays in the garage. No smoke. I have 2 add 2 quarts every 2000 miles. Where is it going?
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