Oil in the Intake + Hard Start + Misfires
#26
The Angry Wheelchair
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1) Excessive oil is generally due to overfilling.
Also a good idea to use a funnel in the oil filler neck when pour oil in.
ALSO... there is a TSB that routes the hose to the lower intake manifold, but unless you have an extended warranty, you'll end up paying for it.
Might just be cheaper to get the catch-can.
Here is the TSB if you want to look through it:
http://www.finishlineperformance.com...50-06-1664.pdf
Also a good idea to use a funnel in the oil filler neck when pour oil in.
ALSO... there is a TSB that routes the hose to the lower intake manifold, but unless you have an extended warranty, you'll end up paying for it.
Might just be cheaper to get the catch-can.
Here is the TSB if you want to look through it:
http://www.finishlineperformance.com...50-06-1664.pdf
Second thing is the TSB. I'm not very keen on the looks of it for a few reasons. While it gets around plugging up the valves in the intake (SSV, etc) it's still essentially introducing crankcase oil to the intake for going onto the rotor unless I'm envisioning something wrong in my mind. This is alike to using the regular crank oil for lubbing the apex which I didn't want and used a SOHN specifically for this. So in my mind this defeats the purpose for those who want 2-stroke, proper oil, going into the engine. If this seems sound from your experience I plan on using vacuum plugs on those 2 ports like the '04-'05 have and running almost all the lines that go into the intake back to a catch can to eliminate virtually any possibility of this crap going into it. I rather do that for a peace of mind that gunk or crankcase oil in general is NOT getting back down into the engine.
Let me know what you think.
BTW, thanks for your effort in the past on SSV topics to show the video and DIY's you did. They were extremely helpful making people new to the engine understand and inspect those areas within hours. RIWWP plans on eventually tearing his lower intake manifold off to clean all those valves up as do I at the end of the year when it's in hibernating.
Last edited by Vlaze; 04-17-2010 at 05:08 PM.
#27
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Yup, fresh 4 stroke dumped right back into the accordion, only pulled it out of the garage about 30 feet, let it idle warm, and shut off. Accordion looked wet, dug a pinky in there and came back with fresh partially darkened amber oil. Maybe 1-2 oz total that i cleaned out.
Idle is unstable again. First through third are good, bit of power loss top of 3rd, 4th+ are still weak.
I'm thinking your guess on the fuel sock or pump (as well) might be worth looking into.
Idle is unstable again. First through third are good, bit of power loss top of 3rd, 4th+ are still weak.
I'm thinking your guess on the fuel sock or pump (as well) might be worth looking into.
#28
The Angry Wheelchair
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Dang, so much for all that effort. At least we eliminated some possible causes. If it doesn't cost much to rent/borrow the tool for the fuel sock then might as well. One more thing you don't have to pay the dealer to look into.
I'd also take the exhaust off to see if anything is loose in there for the sound we heard when time provides.
I'd also take the exhaust off to see if anything is loose in there for the sound we heard when time provides.
#29
Grasshopper
iTrader: (1)
When you guys cleaned the intake, did you also clean the hose connecting the oil filler neck to the intake?
Also, did you remove and clean out the resonance chamber?
Was there excessive oil on the air filter and/or box and if so, did you clean that too?
There is nothing wrong with plugging the maintenance ports and just running a catch-can with a breather installed.
Also, did you remove and clean out the resonance chamber?
Was there excessive oil on the air filter and/or box and if so, did you clean that too?
There is nothing wrong with plugging the maintenance ports and just running a catch-can with a breather installed.
#30
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No to the hose, probably should have. Yes to removing the resonance chamber? We took off everything before the LIM, including UIM, that curved piece that spans underneath it that joins up with the LIM, throttle body (didn't disconnect coolant lines), accordian, air box, filter.
No oil on the filter or in the air box itself, though the screens were black and I wiped them to silver?
There was also a bit of sand or dust grit in the throttle body and the UIM, which was concerning to me. Gonna replace my air filter again as well.
No oil on the filter or in the air box itself, though the screens were black and I wiped them to silver?
There was also a bit of sand or dust grit in the throttle body and the UIM, which was concerning to me. Gonna replace my air filter again as well.
#32
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Yes, that is what the question mark meant.
If it is the more vertical smooth fairly square edged (compared to everything else there) piece that is attached to the tube, then it was removed with the tube, but not separated from the tube.
Looks like something else I will need to check out.
If it is the more vertical smooth fairly square edged (compared to everything else there) piece that is attached to the tube, then it was removed with the tube, but not separated from the tube.
Looks like something else I will need to check out.
#34
The Angry Wheelchair
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^+1 yup didn't even think about that, good call. That'll at least stop old gunk from getting up in there, but he still needs a catch can to address that issue.
I plan on getting one and adding a few more inlets so that literally no hose goes back into the intake, I'm not taking any chances with crap going back in there.
I plan on getting one and adding a few more inlets so that literally no hose goes back into the intake, I'm not taking any chances with crap going back in there.
#35
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Ok, tried something on the way back home yesterday that significantly improved my 8. Again, still not back to where it was, but much much closer. Again.
Early on in the trip, I stopped to fill up, having let the tank drop down to bare minimums (filled up 14.9 gallons), I dumped the entire can of seafoam into the gas tank, all 16 ounces. I then did the 20 brake pedal stomp to reset the fuel trims. Immediately after starting, pulled out of the gas station and onto the highway. Literally like 40 feet to the ramp.
Kept it at steady RPM cruise in 6th gear between 3,000 and 4,000 for most of that tank, and it was responding better and better the more seafoam filled gas it used, and got 20.5mpg. Down from the 23-24 I would usually get, but by the end of the tank, I could feel that 'pop' to the gears engaging from their loose bit of play when I would apply the gas from off-throttle, rather than it just bogging down.
Was thinking that maybe if my fuel filter sock is partially clogged from premix, the seafoam should break that down quite well. I think I will be adding a replacement filter to my list of repairs. Starter comes first though...
Early on in the trip, I stopped to fill up, having let the tank drop down to bare minimums (filled up 14.9 gallons), I dumped the entire can of seafoam into the gas tank, all 16 ounces. I then did the 20 brake pedal stomp to reset the fuel trims. Immediately after starting, pulled out of the gas station and onto the highway. Literally like 40 feet to the ramp.
Kept it at steady RPM cruise in 6th gear between 3,000 and 4,000 for most of that tank, and it was responding better and better the more seafoam filled gas it used, and got 20.5mpg. Down from the 23-24 I would usually get, but by the end of the tank, I could feel that 'pop' to the gears engaging from their loose bit of play when I would apply the gas from off-throttle, rather than it just bogging down.
Was thinking that maybe if my fuel filter sock is partially clogged from premix, the seafoam should break that down quite well. I think I will be adding a replacement filter to my list of repairs. Starter comes first though...
#36
The Angry Wheelchair
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Yikes, I'd be careful tossing all that in the tank. Read a few people had issues with that if too much eliminates the oil lube then you have problems with the seals. Then again, for your scenario you almost should welcome broken seals since it will mean, new engine sucka!
#37
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Yeah, seal wear isn't a top concern for me at the moment
It's still running significantly better.
Idle is still rough, but i'd take that over power loss. Then again, if the tech was right about a motor mount failing, it could be that for the rough idle.
It's still running significantly better.
Idle is still rough, but i'd take that over power loss. Then again, if the tech was right about a motor mount failing, it could be that for the rough idle.
Last edited by RIWWP; 05-01-2012 at 11:32 AM.
#38
Help Help..."Pictures" of oil in Airfilter box, duct,...
Hi I'm new to this club. I have a couple of questions? What does MAF and SSV stand for? And can I clean these things myself? I did just change the air filter on my 2005 Mazda RX8 36,000 miles...here are some pics...I have oil in the airbox, in the tray under the airbox, in the duct, and on the filter of course....Excessive Blow by? I know it wasn't overfilled...I checked the dipstick the moment I got it back from the mechanic 3 weeks ago...I really don't think they checked the air filter either, but thankfully I did...and Just look at those "Dirty Cabin filters!" WTH! lol Thanks for your input? Oh maybe I have a clogged check valve? If so, where is that located? I'm a girl..but not afraid to get some grease on me and I do understand "How to" do things myself...Thanks guys! *Smiles
#40
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It's probably not the problem here, but IMO, most concienscious RX8 owners overfill their oil. The dipsick is marked to me accurate when following the measuring proceedure in the owner's manual. This specifies a warm engine with a significant wait time for the oil to drain back into the crankcase. What's "full" following the procedure measures low if you don't wait, or if you measure with a cold engine. Full with a cold engine is ~4mm down from the full mark on the dipstick.
#41
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Hi I'm new to this club. I have a couple of questions? What does MAF and SSV stand for? And can I clean these things myself? I did just change the air filter on my 2005 Mazda RX8 36,000 miles...here are some pics...I have oil in the airbox, in the tray under the airbox, in the duct, and on the filter of course....Excessive Blow by? I know it wasn't overfilled...I checked the dipstick the moment I got it back from the mechanic 3 weeks ago...I really don't think they checked the air filter either, but thankfully I did...and Just look at those "Dirty Cabin filters!" WTH! lol Thanks for your input? Oh maybe I have a clogged check valve? If so, where is that located? I'm a girl..but not afraid to get some grease on me and I do understand "How to" do things myself...Thanks guys! *Smiles
SSV = secondary shutter valve (located on the LIM = lower intake manifold)
To clarify the reason for using a funnel for oil fills, (1) if oil runs down the upper inside of the oil filler tube, it can get into the breather hose opening. (2) if the little plastic ring around the neck of the quart container comes off, it falls straight into the crankcase and may require dropping the oil pan to retrieve.
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