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1993 Chev lumina Euro 3.1 Engine, dumping fuel into oil
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peoplewatcher52
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Sep 8, 2017, 10:15 AM
Post #1 of 11
(2095 views)
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1993 Chev lumina Euro 3.1 Engine, dumping fuel into oil
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Starting four weeks ago the car was running and the check engine light came on then it stopped. Since then it has had lost of work done on it. O2 Sensor Coils replaced Coils control mount Crankshaft sensor Knock sensor Computer Fuel pressure regulator Valley gasket and plenum gaskets The main system code being received is 44 - lean/O2 sensor Also getting gas in the oil.
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Hammer Time
Ultimate Carjunky
/ Moderator
Sep 8, 2017, 10:23 AM
Post #2 of 11
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Re: 1993 Chev lumina Euro 3.1 Engine, dumping fuel into oil
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Check your fuel pressure and see if it holds when the key is shut off. ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.
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peoplewatcher52
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Sep 9, 2017, 9:26 AM
Post #3 of 11
(2043 views)
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Re: 1993 Chev lumina Euro 3.1 Engine, dumping fuel into oil
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Looking like it needs a ring job, might be cheaper to just replace the engine and get the transmission rebuilt.
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Hammer Time
Ultimate Carjunky
/ Moderator
Sep 9, 2017, 9:37 AM
Post #4 of 11
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Re: 1993 Chev lumina Euro 3.1 Engine, dumping fuel into oil
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Ring job? How the hell do you equate fuel in the oil to a ring job? ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.
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peoplewatcher52
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Sep 9, 2017, 10:00 AM
Post #5 of 11
(2033 views)
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Re: 1993 Chev lumina Euro 3.1 Engine, dumping fuel into oil
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Please explain how else large amounts of fuel would get into the engine oil with the engine running.
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Tom Greenleaf
Ultimate Carjunky
/ Moderator
Sep 9, 2017, 10:16 AM
Post #6 of 11
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Re: 1993 Chev lumina Euro 3.1 Engine, dumping fuel into oil
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Easy - it's dumps more fuel than consumed - you are harming O2 sensors with raw fuel not that might think it needs more as it went stupid and doesn't work, next is converter if not blow the engine as gasoline isn't a lubricant. You'd also be finding oil too full, thin in extremes. Fuel injector - one or more don't shut down totally a possible cause even engine off the bit at a time runs down past rings into oil. With good compression still find out - usually just find the wet spark plug or if all what else. 93, OBD 1 makes you think a bit harder what the REAL cause is, T
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peoplewatcher52
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Sep 9, 2017, 2:14 PM
Post #8 of 11
(2014 views)
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Re: 1993 Chev lumina Euro 3.1 Engine, dumping fuel into oil
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One of the things not stated in this posting is that about six-seven weeks ago the fuel pump was replaced due to low fuel pressure. ALso the fuel injectors were replaced.
(This post was edited by peoplewatcher52 on Sep 9, 2017, 2:19 PM)
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Discretesignals
Ultimate Carjunky
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Sep 9, 2017, 3:23 PM
Post #9 of 11
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Re: 1993 Chev lumina Euro 3.1 Engine, dumping fuel into oil
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The lean code doesn't jive with you suspected over fueling. If you had the scan tool you could look at O2 voltage and block learn to see what is actually going on. If you have a volt meter see what your signal volt is when the ignition is on with engine off. Then check that the 02 heater circuit is good. If your O2 signal circuit is shorted to ground that will make the computer over trim the engine. Since we volunteer our time and knowledge, we ask for you to please follow up when a problem is resolved.
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peoplewatcher52
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Oct 19, 2017, 6:12 AM
Post #10 of 11
(1947 views)
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Re: 1993 Chev lumina Euro 3.1 Engine, dumping fuel into oil
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Car went to a shop here in the Houston area, they found the crankshaft sensor was bad and replaced, also said the plenum/intake gasket needed to be replaced due to vacuum leak. The car ran for one day before going back to the shop. After Harvey they tried for about 1.5 weeks to get it running and could not find the problem. The engine would still not stay running. They gave up and had us pick up the car. We bought a replacement engine and rebuild transmission installed and the car is running fine. Also did a drivers side strut/spring. Both lower ball joint / tie rod ends. Lower A are bushings.
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Tom Greenleaf
Ultimate Carjunky
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Oct 19, 2017, 6:50 AM
Post #11 of 11
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Re: 1993 Chev lumina Euro 3.1 Engine, dumping fuel into oil
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What a switch! Kind of understand the total disruption of a storm like Harvey to mess up the show for so many but this engine was able to run, gaskets suggested and now up to throwing it totally out and redo a trans and more too? What lack of finding what the problem was could lead to that or do you know? Have to ask but did this car get flooded in your custody or theirs by any chance? Hope not but if so IMO it shouldn't have been fixed at all as so much else can and will go wrong. If not for the storm this doesn't add up to me. It wouldn't stay running a tech would or should be looking hard for what falls out 1,2,3 +4 no fuel, not spark, change of compression due to valve timing some others like a total exhaust restriction for some reason real fast? Hope you are OK with this whole thing and it works out just my opinion it was a lot to do for a 1993 vehicle without some serious details requiring that AND that the car overall was worth it? Wish you luck with it, T
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