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Old 09-12-2019, 10:23 AM   #11
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MMO should go through a fuel filter effortlessly, it mixes with fuel almost instantly. You just end up with oily fuel that will burn with a lot of soot. The extra soot is what poisons the O2s and the cat. The oil also covers up some of the fuel's volatility, or the ability to vaporize easily to have plugs light it off faster and easier. Why some of it is still burning in the pipe, the burn got slower and the wetted plugs fouled to add to that even more. The backfiring.
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Old 09-18-2019, 08:35 PM   #12
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Yes throw a gallon of paint thinner in the fuel tank , while you are at it go get some def tank liquid and throw 2 cups in just to be sure. Thirdly send 2 upc codes to youtube to get your official youtube master tech patch.
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Old 09-19-2019, 12:32 AM   #13
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I’m with Paul on this, check your live data. Likely just end up getting new O2 sensors.
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Go ahead & change your fuel filter anyway, it’s cheap enough to do.
See about checking gas cap & fuel vapor system too.
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Old 09-19-2019, 11:42 AM   #14
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my 2cents. Has the Fuel rail pressure sensor been replaced with the bosch aftermarket one. They always fail around 100k and any high milage car you see has the bosch one which works great. Also when you are cold and you hear a bit of an exhaust leak. It could be the header warped. My 2005 did. I think running MMO and cleanings pulls crap out of the tank so it can clog already restricted fuel filters. Also I don't think that much MMO in a full tank hurt anything. I tossed a dash in every cylindar once and besides a TON of white smoke nothing happened. My only code is from my warped header. I shaved it down enough that it doesn't sound like a straight pipe but it needs another 10 thousands before I think it will seal right.
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Old 09-19-2019, 09:30 PM   #15
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Quote:
Originally Posted by RELLIKPIR View Post
when you are cold and you hear a bit of an exhaust leak. It could be the header warped. My 2005 did. My only code is from my warped header. I shaved it down enough that it doesn't sound like a straight pipe but it needs another 10 thousands before I think it will seal right.
My ‘05 2.0l has this leak as well. It’s louder when cold too.
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How’d you get the header trued up?
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Old 09-20-2019, 12:03 AM   #16
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Warning if we share heatshielding removing it before hand is required and will require damaging it. I wrapped my header so I don't have put it back. If you can find a shop do that for 100 bucks.. Otherwise a belt sander will probably do 90% of the work easiest. A small electric hand sander for like 7-8% that last bit will be all elbow grease and time. The 20 dollar aluminum leveling stick at Harbor freight is true. Take a feeler Gage to verify before purchasing. I glued dense foam to a mostly trued board for my overall leveling. Stuff some paper in too prevent Debris from entering cat. Be sure to disconnect lower exhaust before moving engine to prevent damage to flex. Good luck
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Old 09-21-2019, 03:25 AM   #17
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The PO clearly told us the problem began when he added the oil, I don't know why people have so much trouble with that. Post #14 goes where the other guy went (post #4 and read the conditional situations given there as 'equal' but ARE NOT) and not thinking there, we are talking the difference in 5 minutes using a chemical vs. '90 miles' (NOT 5 minutes by any means!) or a chronic buildup and the two conditions are not relatable except in a world of those who do not understand differences or differential results.

No wonder things never get fixed around here.
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Old 09-24-2019, 12:45 PM   #18
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MMO is not the cause of your problem. I've had tired engines that burned oil, and all I had was tranny fluid so eventually, the oil was 60%+ tranny fluid rather than oil, and no adverse effects. And MMO is sort of like tranny fluid. But anyway, I've run 20% MMO in many vehicles, and it's done wonders for sticky valve guides, and cleaning things up, running smoother. I put it in my fuel as well. I've used it in classic cars as well as modern OBDII cars, and never had issues. Before I found out about MMO, I used tranny fluid the same way--20% tranny fluid in the crankcase, and a measure in my fuel as well. I'm not saying everyone will have my success, but I'm not just spouting off woulda coulda shoulda's, this is my real life experience.
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Old 09-24-2019, 05:08 PM   #19
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Some people have cars that live in spite of them rather than because of them, that would apply here for sure.

Why there are both good and bad life experiences.

And once again we are calling the OP a liar.
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Old 09-25-2019, 12:59 AM   #20
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Do you have experience causing your own car to fail due to MMO or transmission fluid in the crankcase?
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