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Hey, Eric!
I’m a long time viewer first time question asker! My question is this:
I have 2000 Toyota echo with roughly 280k miles. This is my daily and I really want to get this fixed since it has a hard time starting in the cold weather. I have a p0171 code, I have already replaced the intake and throttle body gaskets( they were definitely old and cracked due to age) cleaned the MAF and verified it still works. I cleared the code and it still came back after it did computer did it’s cycles. I rechecked my work on gaskets and they were still good. I inspected all vacuum hoses coming from the intake manifold and cannot find any leaks with a spray bottle and water. When I put water on the manifold, I thought I saw it run rougher but I’m not sure anymore. I can definitely hear hissing coming from the intake. I do have an exhaust leak before the catalyst (not a big leak but still a leak where the exhaust manifold meets the cat). Would that also cause a p0171? What would be your next step? New intake manifold? BTW, this is a plastic intake manifold.
P.S. I’m trying to convince my wife to go with me to next year’s meet up since I’m a such a fan of your work! I couldn’t go this year due to other obligations. Hope to see you next year and the next meet up! Thank you for all you do with your amazing content!
Good luck on Oliver!-Marcus