edomund

I have been asking everyone I can about this problem, but no one can really give me any answers. But I have faith in this forum, so come guys help me out, give me ideas to try. My car has a problem with smoking due to oil burning. About a week ago it would smoke badly, but only when revved to around 4000+ rpm's. Yesterday I took apart my intake manifold trying to see if the oil injectors were bad or if there was a vacuum line disconnected from them. I found out that one of the oil nipples was bad so i replaced it and put everything back together. Replacing the oil nipple helped the problem a bit. Now it only smokes at 5000 rpm's (this is why I don't think it's bad seals). Could I test the oil injecting system by totally disconnecting it and then start my car and see if it still smokes? (only for a second so I don't damage anything)

Thanks in advance (please any help would be great this problem has me stumped)

Ed

The Ace

Errrmmm, dont think thats a smart thing to do...Apex seals need this oil to run smoothly along the housing. If you take away that oil....BANG!!!!
If you have such a problem, go to a good rotary mechanic and let him take a look...

edomund

I can't find any good rotary mechanics in my area.
Anyone else have any ideas?

HAILERS

I think I have a better solution since you have a 86. On the front of the dynamic chamber there are three vacuum hose. The large one goes to the spider for the oil injectors. Start and idle the car. Pull the large vac line off and feel for a vacuum coming from the direction of the spider and injectors. If you feel a vacuum = bad injector. You will have to plug the nipple where the vac line was going during this brief check. If that does not satisfy you , you can disable the oil pump and give it a try. Might want to put some premix oil in the gas tank first. Sorry I don't know what the ratio is . I'm sure someone will post that for you. No harm done if you do the premix. Pulling the vac line and doing the above check just proves that the check valve or whatever is in the injector is doing its job. I've got three out of four injectors on a turbo kaput right now. All three pass air both directions. There is a good post this day on oil injectors by Sniper? I think. Worth reading. His method won't work on my car because the lines are not transparent.

edomund

I already pulled the mianifold and checked all the injectors seperately I found one no good and replaced it. You said your car has three bad, does your car smoke at all? I think I need to try disconnecting and running premix, is running premix safe (anyone tried it)?

SpeedRacer

Yes, in fact running premix is preferable as premix is MADE to burn and dyno-oil isn't. Lots of people run premix here.

HAILERS

Edmund, disregard the earlier suggestion for checking the injectors. Not right. Had air gap b/t the ears. And no the rebuilt engine does not smoke. It has but 500 miles so I also do not know the consumption either. Before putting it together I checked each one. Three out of four passed air both directions. I'll replace them when I get the new ones. No harm being done. I've read several posts on this site where people run premix all the time with the metering pump disconnected.

edomund

Today I disconnected the metering oil pump and ran premix to compensate. I tryed driving it, but it still smokes at high rpm's. I decided to go for the last thing before considering an overhaul It's sitting in atf as we speak. Tomorrow I will go see if the atf helped at all.

If anyone has any ideas for my poor FC PLEASE let me know before I shell out the bucks on an overhaul.

Thanks, Ed

edomund

any ideas to help my smoking?

Six Rotors

iTrader: (17)

The oil injection pump operating lever has been known to "freeze" in the wide open position.You may want to check it.It should move freely between the stops.

edomund

I disconnected it and am running premix now. The metering pump is hooked up, but I disconnected the oil lines running to the injectors. Do you have to completely take it off the cat or is this fine?

edomund

Any tips on starting the car after the atf trick? My friend says it's going to be hard to start because the plugs will be all wet any tips on how you got yours started?

Thanks, Ed

copandengr

The smoke at high engine speeds is most likely caused by failing oil control rings.

As the engine ages two things happen. First, the rotor end housing gets a wear pattern on it. This causes the oil control rings to "bounce" when running fast. The second event is the build up of carbon everywhere. This will affect the performance of the seals as well.

The oil pressure also goes up at high RPMs and this will tend to force more oil past the oil control rings.

mazdaspeed7

I run premix in my car with the OMP disabled, and have since the engine was rebuilt. Ratio is 1 oz per gallon, which gives you a ratio of 128:1.

You CANNOT just disconnect and plug the oil lines. It will cause the OMP to lock up, and give you error codes all day long. This happened to mine, and it was a major PITA to fix. If you dont plan on using the OMP again on your car, pull it off of the car, and pull the gears out of it. Then put it back on the car. This does work, I have put 6K miles on it running premix with absolutely no problems.

If you do want to use the OMP without having to put it back together, put the lines back on, and just run a little less premix, like 1 oz per 2 gallons.

Your oil control rings definately sound like theyre on their way out.

edomund

So what do you think I can do to keep the smoke to a minimum until a rebuild?

mazdaspeed7

You said it doesnt smoke below 5K rpm, right? Then just stay below 5k rpm, and it wont smoke. Other than that, there is nothing you can do to make it stop smoking without rebuilding the motor. If youre nice to the motor, it will last longer before you need the rebuild, but be aware that the motor is on its way out.

edomund

The funny thing is that this problem seemed to arise after I gutted my cats. Could my gutted cats be aiding this problem, does the cat help burn off extra oil, or could the air pump still being there be throwing something off?

edomund

^

mazdaspeed7

The cats might smoke for a while after you gut them, but it wont be oil smoke. It will be the dust burning off.

If your car is burning *oil* at higher RPM's and that is causing the smoke, you will need a rebuild before long, period. There is no way around a rebuild if the oil control rings are worn out.

If oil isnt what is causing the smoke, you either have a differnt problem, or no problem at all. The cats will smoke a little after they are gutted, and it will take a few weeks to stop. Same for the smell. After few weeks, it wont smell hardly at all.