o2 sensor + other questions
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o2 sensor + other questions
i am gonna rebuild my 300 six in about a month and a half. it has over 150,000 miles, or 250,000 miles, not sure which, and it leaks oil real bad (1 quart every 2 to 3 days). The rear main seal is gone and the pan gasket is shot too. to replace both seals i know the engine needs lifted and a new pump needs put in. i figure while i lift it i might as well rebuild. my first question is i want a new o2 sensor since i have no idea when the last time it was changed. should i wait till i rebuild to buy the new sensor or can i just use a month old sensor in a fresh motor? I want to help this fresh motor breath good so i was thinking about either replacing or hollowing the cat. my friend said he can get me a new universal cat for 80 bucks, if i want the actual proper one it would be 300. what is anyones take on this, are the universals any good? how would a hollowed cat effect my gas milage and my 84 feedback carb? also do i need a friction addative for a "b" code axle?
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If it was me, I would save the money you are going to spend on that o2 sensor and buy a non feedback carb from a 83 or older 300. Just my opinion. As for hollowing out the converter it should be OK as long as you dont have any emissions in your area. It should give you a little more power.
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yes i have emmisions in my area, but its only a visual check. I want to keep the feedback cause if i am gonna do the work to switch a carb i am gonna go to a 4bbl and i don't have the money to do that now. how are the universal cats that are cheaper? will they screw up the feedback? will hollowing the cat screw up the feedback?
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If you put a universal converter on your truck you will have to fab up the air injection tube. If I were you I would put a factory converter on your truck, less headaches in the long run. As long as you have a muffler on your truck you should have enough back pressure to keep you from loosing low end torque.
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From: Scottsville, VA
I just bought my truck but haven't picked it up yet so I can't crawl underneath and look. Does an 80 have a cat?
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slynx47
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Apr 2, 2005 10:29 AM