Smoking on decel only
- Thread starter Jordan
- Start date
Does it smoke on startup or ANY other time?
Sent from my iPhone using Tapatalk
Sent from my iPhone using Tapatalk
Jordan said:
Could be piston rings if you have new turbos and have ruled them out...
I would pull some of the plugs and check them, additionally a compression check would be worth it.
Decel smoke would indicate a vacuum issue... are you running a catch can?
Sent from my iPhone using Tapatalk
StealBlueSho said:
Why would there be oil in the intake tract if it could be piston rings is my question? I have replaced the plugs and nothing looked out of the ordinary. I have pictures of them and they are all very even in terms of colors. It's been doing this for probably 5,000 miles now. I haven't done a compression test though, but never thought it would be necessary if it's intake side.
Jordan said:
Is the oil pooling at the TB? It’s normal for a small amount of oil residue to be the intake track with these cars. Pooling is not though...
How much smoke are we talking about? Is it noticeable in the rear view?
Looking at that picture you posted, that doesn’t look out of the ordinary... and if there was enough oil coming through the intake track into the combination chamber, you would see smoke at more than just decel.
Sent from my iPhone using Tapatalk
Here is a picture of plugs. And the noisemaker delete from EPP was put on 2-3 weeks ago. There was a decent drip at the bottom of the pipe. You can see a decent bit in the rear view if you really aggressively downshift or try to do it. Even was doing this when I was at the strip so I'd like to assume it wouldn't be lacking on compression if that's the case. I'll need to check the throttle body, but I didn't see anything out of the ordinary when I took the pipe off, but can't say I was paying attention as I was really just checking the noisemaker pipe. Plugs were done last month and it's been smoking a long time longer then that.
Maybe someone else will chime in... but if you have done all the things you have said... then I would start with a compression test, that will let you know if the rings, valves, etc are causing the problem...
Otherwise you could have a DOA turbo but if it was doing before the original set were replaced, and again after, that leads me to believe it’s mostly likely not a turbo...
Could try a catch can, but that would most likely hide an existing issue..
So is the smoking only on decel and when reving past 2K in Park? Cause your last post made it sound like it’s also smoking when it down shifts going into wot?
Sent from my iPhone using Tapatalk
Otherwise you could have a DOA turbo but if it was doing before the original set were replaced, and again after, that leads me to believe it’s mostly likely not a turbo...
Could try a catch can, but that would most likely hide an existing issue..
So is the smoking only on decel and when reving past 2K in Park? Cause your last post made it sound like it’s also smoking when it down shifts going into wot?
Sent from my iPhone using Tapatalk
StealBlueSho said:
PCV is completely blocked on the intake manifold so there is no crank case ventilation going into the intake manifold. It has a catch can technically just that line is zip tied down. If you rev and hold above 2k it'll smoke decently and I mean on aggressive downshifts to slow the vehicle via engine braking. I didn't specify that at all thanks for catching that it made sense in my head.
glock-coma
New member
Have you checked the intercooler for accumulation? Even with a good turbo you’ll still get some oil in there.
I had this on my SHO as well. My car had 800 miles on it. I had catless DP's and a catback so NO cats. On decels and idle revs I would see and smell oil smoke. I never checked my PCV oil separator back then so I don't know if it was clogged but I doubt it. Jordan I don't like you capping the intake and venting the PCV to atmosphere because turbo engines need to have some sucking of the crankcase. It helps the oil drains.
I hate thinking that new turbos are bad but maybe these turbos are just junky..I mean they are only like 500$
SOmetimes people overfeed oil to turbos or mount the drains too low in the pan but this is an OEM setup so you know that's right.
I have never or will never buy the idea that when back pressure is too low the turbos will smoke. Race cars have huge exhausts with no cats and I've run multiple turbos with not cats and 3" exhausts...A little oil can cause a lot of smoke so maybe your oil problem isn't as bad as you think.
Are you sure your catch can system is routed properly and check valves if you have any are fine?...All of this is why I route my crankcase hoses right into my filters in my turbo coyote...It's simple and I'm not worried about a little oil mist lowering octane, it's tuned for the octane it has.
I hate thinking that new turbos are bad but maybe these turbos are just junky..I mean they are only like 500$
SOmetimes people overfeed oil to turbos or mount the drains too low in the pan but this is an OEM setup so you know that's right.
I have never or will never buy the idea that when back pressure is too low the turbos will smoke. Race cars have huge exhausts with no cats and I've run multiple turbos with not cats and 3" exhausts...A little oil can cause a lot of smoke so maybe your oil problem isn't as bad as you think.
Are you sure your catch can system is routed properly and check valves if you have any are fine?...All of this is why I route my crankcase hoses right into my filters in my turbo coyote...It's simple and I'm not worried about a little oil mist lowering octane, it's tuned for the octane it has.
PCV was only unhooked to see if it was pulling excessive vacuum plus oil vapors into the engine. I'll hook that back up. And as far as oil I am unsure I get free full synthetic oil changes at my local ford store due to how many I get with my company car. (4 oil changes 5th is free so I just do the fifth on my own car) I do believe it's 10w30, but not 100%. I just don't get it and I am kind of at the point where I am tired of throwing money into this 114k mile car despite it being wonderfully reliable. Might just check out my local store and see about getting a decent mile SHO and swap all my goodies over.
However something I still need to do, but won't have the time to is pull off the charge pipes off the turbos and see if there is any excessive oil build up between the two. Assuming it could be a turbo then it would have more oil on it than the other... At least I'd hope.
However something I still need to do, but won't have the time to is pull off the charge pipes off the turbos and see if there is any excessive oil build up between the two. Assuming it could be a turbo then it would have more oil on it than the other... At least I'd hope.
Trading it in already?
Sent from my iPhone using Tapatalk
Sent from my iPhone using Tapatalk
Ha, I have had it for over a year now. Been fighting this problem for a few months easily. It would be a few different things to trade it. Would allow me to get a slightly newer lower miles Taurus while also alleviating me of the oil in the exhaust problem that I can't seem to figure out.
Jordan said:
If the trans and PTu are good, might be worth sending the motor to Supersix for a stroker kit... cheaper than buying a new car... I would have done that had everything else in my 2010 been sound....
Sent from my iPhone using Tapatalk