Mystery's afoot 

Kinja'd!!! by "DC3 LS, will be perpetually replacing cars until the end of time" (dc3ls-)
Published 04/25/2017 at 21:19

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If only I had some meddling kids to help solve it :(

Kinja'd!!!

Kinja'd!!!

Basically, to my knowledge, all signs point to the Teg not burning oil. Despite it burning oil. I had someone else start it up after 3 hours of sitting and no smoke came out either. And I’ve never seen or been told it has after running.

Although there are some grey spots on there. So maybe that’s just an early sign of bad oil burning? I was expecting to see actual black on them though. Also there was some white crystallization on one or two of them. I have no idea what that means.


Replies (37)

Kinja'd!!! "TheHondaBro" (wwaveform)
04/25/2017 at 21:25, STARS: 1

Your car has a meth problem.

Kinja'd!!! "tromoly" (tromoly)
04/25/2017 at 21:28, STARS: 2

Too lean? Though white crusty build-up can indicate oil burning.

Kinja'd!!! "MM54" (mm54mk2)
04/25/2017 at 21:30, STARS: 0

Almost looks like somewhere between lean and bad gas, but I’m not certain. How old are these plugs?

Kinja'd!!! "bopacker" (bopacker)
04/25/2017 at 21:30, STARS: 0

I’m not fully confident, but I think what you have there are ash deposits from burning oil.

Kinja'd!!! "Die-Trying" (die-trying)
04/25/2017 at 21:35, STARS: 1

looks like it is running somewhat lean........ maybe some sort of additive?or maybe the brand or quality of fuel you are using?.....that could also paint the plugs........

Kinja'd!!! "TahoeSTi" (tahoesti)
04/25/2017 at 21:35, STARS: 1

are you burning oil or losing oil? Blow by stuck in a catch can or just spraying out? Oil Leak? Maybe something up top burning off as it goes?

Kinja'd!!! "DC3 LS, will be perpetually replacing cars until the end of time" (dc3ls-)
04/25/2017 at 21:37, STARS: 1

It did spend a lot of time in South Tacoma...

Kinja'd!!! "DC3 LS, will be perpetually replacing cars until the end of time" (dc3ls-)
04/25/2017 at 21:40, STARS: 0

Not sure yet, it’s not leaking very much. Just a light coating on the front with nothing on the ground. It’s not smoking at all. I pulled a hose that runs from the valve cover to the TB and there wasn’t any oil in it (I don’t think it was the actual PCV hose.)

A common issue with these is the valve seals leaking, which is why I watched someone else start it cold, no smoke then or while driving.

In the past 2-3 weeks it lost a quart of oil by the way.

Edit: No catch can BTW

Kinja'd!!! "DC3 LS, will be perpetually replacing cars until the end of time" (dc3ls-)
04/25/2017 at 21:41, STARS: 0

No codes, but if it’s slight who know. I guess I’ll replace the fuel filter soon.

Kinja'd!!! "DC3 LS, will be perpetually replacing cars until the end of time" (dc3ls-)
04/25/2017 at 21:42, STARS: 0

Idk, I’ve had the car less than a year. When I got it they were fine and perfectly in spec. No there’re just out of spec and looking like this.

Kinja'd!!! "DC3 LS, will be perpetually replacing cars until the end of time" (dc3ls-)
04/25/2017 at 21:43, STARS: 1

Hmmm, now the question is how dumb are OBD-I Honda ECUs...

because no CEL

Edit: Vary dumb, I remember my old Civic had an audible vacuum leak that the ECU didn’t pick up *Face palm.

Kinja'd!!! "MM54" (mm54mk2)
04/25/2017 at 21:47, STARS: 0

What makes you think it’s burning oil if you’re not able to see any smoke from the tailpipe? (Have you had someone follow you while driving to watch? Could just be a puff when you change gears, etc)

Kinja'd!!! "Die-Trying" (die-trying)
04/25/2017 at 21:50, STARS: 0

you sure the cel is still lighting up?

Kinja'd!!! "DC3 LS, will be perpetually replacing cars until the end of time" (dc3ls-)
04/25/2017 at 21:52, STARS: 0

I’ve watched someone else driving it and didn’t see anything. In the past 2-3 weeks it lost a quart. Previous to that it would loose a quart in about 2-3 months. The coolant and oil are both the correct colors.

Kinja'd!!! "DC3 LS, will be perpetually replacing cars until the end of time" (dc3ls-)
04/25/2017 at 21:53, STARS: 1

I’m not sure, I’ll check. All you have to do is jump something with a paperclip on these.

Kinja'd!!! "Eric @ opposite-lock.com" (theyrerolling)
04/25/2017 at 21:56, STARS: 2

It’s running hot, probably running too lean.

Kinja'd!!! "Smallbear wants a modern Syclone, local Maple Leafs spammer" (smallbear94)
04/25/2017 at 21:56, STARS: 0

Which meddling kids did you have in mind?

Kinja'd!!! "McMike" (mcmike)
04/25/2017 at 21:58, STARS: 2

Barefoot is Jagvar’s thing, please put on some shoes.

We only have room for one of you in here.

Kinja'd!!! "DC3 LS, will be perpetually replacing cars until the end of time" (dc3ls-)
04/25/2017 at 21:59, STARS: 0

Here’s the deal with the coolant temp though (Don’t have oil temp or OBD-II) It stays slightly to the cold side of the middle during normal driving, I’ve replaced the temp sensor since then and it does the same thing still.

The OBD-I hasn’t popped a CEL. But from my experience Honda OBD-I is pretty crappy at identifying stuff, but I’d still think it could identify a lean condition.   

Kinja'd!!! "Die-Trying" (die-trying)
04/25/2017 at 22:00, STARS: 0

are you running the cheapest gas you can find? and where from?.......

Kinja'd!!! "DC3 LS, will be perpetually replacing cars until the end of time" (dc3ls-)
04/25/2017 at 22:00, STARS: 1

There not even in focus!

Kinja'd!!! "DC3 LS, will be perpetually replacing cars until the end of time" (dc3ls-)
04/25/2017 at 22:01, STARS: 1

87 octane from Exxon and Shell mostly. So I doubt it’s bad gas. It is due for an oil change right now. I’ve just been putting it off trying to figure this out. A little bit of oil is getting in from the top as you can see, but it doesn’t look like it’s getting down to the business end.

Kinja'd!!! "Die-Trying" (die-trying)
04/25/2017 at 22:16, STARS: 1

try running the high dollar gas for a week or two, and then pull the plug that was THE worst, and see what it looks like. higher octane gas helps to reduce detonation, and it is usually a slightly different blend than the low grade stuff. you should be able to tell if it is a fuel quality issue or a timing issue. higher octane will help with light pinging....... that was the other thing i was gonna suggest, was checking the base timing, and also the timing at rpm, and making sure its in a decent range.......

Kinja'd!!! "MM54" (mm54mk2)
04/25/2017 at 22:23, STARS: 0

Is it self-undercoating (aka leaking while you drive)? Many years ago I cut my chevelle’s oil consumption in half by replacing valve cover gaskets.

Kinja'd!!! "My X-type is too a real Jaguar" (TomSlick)
04/25/2017 at 22:34, STARS: 0

Oil getting past the exhaust valves have you pulled the valve cove?

Kinja'd!!! "Eric @ opposite-lock.com" (theyrerolling)
04/25/2017 at 22:35, STARS: 0

Do you have a mass airflow sensor?

Kinja'd!!! "DC3 LS, will be perpetually replacing cars until the end of time" (dc3ls-)
04/25/2017 at 22:42, STARS: 0

Not bad, there’s a light coating on the front. I haven’t figured out from were though. The valve covers are good (apart from the spark plug wells which isn’t much.) and the cam plug is barely leaking. Nothing else though.

Kinja'd!!!

Cam plug. That black stuff looks more like grease than oil though.

Kinja'd!!!

Kinja'd!!! "brianbrannon" (brianbrannon)
04/26/2017 at 02:58, STARS: 0

Running lean and running hot are not related in a four stroke

Kinja'd!!! "brianbrannon" (brianbrannon)
04/26/2017 at 03:02, STARS: 0

If it’s using oil and not leaking then it’s burning. What are you trying to determine?

Kinja'd!!! "Eric @ opposite-lock.com" (theyrerolling)
04/26/2017 at 08:33, STARS: 2

You don’t know what you’re talking about.

https://mechanics.stackexchange.com/questions/25434/how-exactly-does-running-fuel-lean-increase-the-temperature-of-ignition

Kinja'd!!! "brianbrannon" (brianbrannon)
04/26/2017 at 09:31, STARS: 0

I actually know exactly what I’m talking about and the forum post you linked to says nothing about engines running hotter from being lean. The hottest temps occur at stoichiometric mixtures and get lower when you go richer OR leaner.

You don’t know what you are talking about but you are repeating a common misconception

Kinja'd!!! "Eric @ opposite-lock.com" (theyrerolling)
04/26/2017 at 10:59, STARS: 2

It does, in fact, explain that they run hotter from being lean, due to physics. Stoichiometric mixtures release the most energy, but that’s not why cylinders get hotter when the mix is too lean.

Here’s a picture. Many variants of this have been floating around for years. What does this plug look like?

Kinja'd!!!

Kinja'd!!! "Eric @ opposite-lock.com" (theyrerolling)
04/26/2017 at 11:01, STARS: 0

I’ll just leave this here, as I used it in a response to some trolling a bit ago...

Kinja'd!!!

Kinja'd!!! "brianbrannon" (brianbrannon)
04/26/2017 at 14:33, STARS: 0

Look at the red part and also any airplane tuning instructions http://www.sdsefi.com/techegt.htm

The physics of it is less energy is released because there is less fuel. The forum you site as evidence only states it takes a higher temperature to ignite the mixture not that it burns hotter BTW

Kinja'd!!! "Die-Trying" (die-trying)
04/26/2017 at 22:24, STARS: 1

lean conditions in cylinders lead to a blow torch effect, that start melting parts quick.....

Kinja'd!!! "Die-Trying" (die-trying)
04/26/2017 at 23:03, STARS: 0

richer conditions, have the fuel to act as a coolant in the cylinder, and as the mixtures get leaner, there is less fuel to cool the cylinder, and at the same time, there is more oxygen to promote a more complete and hotter burn.

Kinja'd!!!

Kinja'd!!! "brianbrannon" (brianbrannon)
04/27/2017 at 00:23, STARS: 0

Nope. Try actually using a blow torch and you’ll find a middle adjustment that is hottest and that gets cooler when you add or remove oxygen. Pistons melting are caused by pre-ignition/detonation. Which can be caused by overly rich or lean mixtures