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Everything posted by 1 Lucky Texan
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no question the 2016 CAFE rules are very tight. surprised though to read the 0w 16 is also recommended in the JDM. Kinda wonder what is in the European owners' manual for those same engines. I have the perfect commute for an electric car but, I'm opposed to subsidizing them so, puts me in a dilemma. After any manufaturer selss 200,000 units, the subsidies start ramping down, it'll be interesting to see what happens to prices/sales when that happens.
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maybe a cable terminal was left loose if you recently bought a new battery? on a 95, battery cables could be badly corroded. Corrosion could be severe but under the insulation . not advising against the above suggestions, but inspecting battery cables/terminals is a good idea. don't neglect the ground connection from the battery either. refreshing all ground connections would be a good idea.
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lab analysis might help (blackstone , polaris ?) - metals or too much fuel, etc. in the oil would point to a bearing failing or weak rings allowing too much blow-by I guess.
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GD - bad engine temp sensor? - but I haven't read of pinging being a symptom.....?
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can't reacll if you mentioned the trans, but wonder if an input shaft bearing or , a cracked flexplate might do this?
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you have a PCV valve - on some years it's on the TB, other years it's on a head.
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kinda wondering if you could have a weak timing belt tensioner. It can mimic rod knock and I guess piston slap, but it can smooth out at higher rpms where rod knock gets worse (this is all, 'usually' of course) but that isn't really 'marbles in a can', it's like a rhythmic knock. I guess you've ruled-out loose heat shields? valve clatter? maybe an oil pressure test is needed? if it does it at idles, or off idle with a helper, could you pinpoint L, R or front rear of engine? maybe it is carboning-up quickly as GD said - he's a pro mechanic. maybe a PCV valve change would help with oil blow-by/control?
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doesn't sound like typical pinging to me. It should get worse with throttle demand as the ecu advances timing. if we could see the knock data/correction, that might be helpful. seems like you have plenty of experience though - just wonder what might sound like pinging at low load/rpm - is it a regular sound that tracks with rpm? is it a buzz/rattle or ????
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seems like higher octane should reduce pinging. maybe you could record the sound and post a link to it?
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plugs correct heat range for the car? does the pinging get better if you run high octane fuel?
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