To start my small story, I flooded my base model '85 7 bad! It was on sunday and didn't get it started till the following saturday. We had to push start it cause it was flooded so bad. So, I was cruising down the highway today and had the rotary spun up to 7 grand in third and then let off. I noticed a lot of blue smoke comming from the exhaust. Then a big bang! It back fired! What the hell is up with this? It never did this before I flooded it. It never smoked before! Did I hurt something? It seems to run the same as before.? help?

 

Mine smokes all the time man. Especially after it is flooded. What happens I think is when it floods, the fuel gets pushed out into the exhaust manifold and it sits there until burnt up by the heat of the exhaust. Backfiring is also what happens when the fuel is in exhaust. Then, your air pump add air to the mix and bam. You have a backfire. The hot exhaust is what ignites it. Just know that this is my idea, and as usual I have no idea really. Its what makes the most sense to me though.

I do know that backfiring doesnt hurt the engine. The muffler, however. I think thats a different story.

 

Whenever the engine floods, the extra fuel/gas washes the oil off of the rotors/chambers, so IIRC, it's usually a good idea to pour a bit of oil down the intake [you put oil in it somehow, I THINK that's how you do it.] That will help restore compression. [Of course, then again, maybe that's only for boingers.]

As for the back fire, How have you never had your rotary backfire on you? Backfires are fairly common to my knowledge. (on rotaries, anyways.)

 

I have yet to have it happen in my 13B and it's been about a month since I got the car.

- EMP

 

So is this thing going to quit smoking soon? I have put about 30 hard miles on since it flooded. I hate it. This thing really smokes bad when I rap out third gear and let off. I'm not sure about the other gears.

 

Oh, so it still smokes? Hmmm, mine when flooded stops smoking by the time it gets warmed up. Some days it smokes more than others, but usually by the time it warms up, it is doing ok. I have noticed though that it seems to smoke more when its cold out. I also have been burning coolant lately, and to combat this I have added a little extra MMO in the tank to make sure that there is plenty of lubrication. Your situation I am sure is different from mine but that is what mine does. Anyways too much rambling. I may just call you if youare cool with it. I still have your number, so let me know a good time and maybe we can figure something out.

Ian

 

Is it possible that the OMP went out?

 

I have to run out to the store now but should be back before long. Call me between 8 and 11 if you have time. Can the O-rings go bad from flooding the damn thing?. It just smokes at high rpm decell not acceleration. this is all new for this car. I hate when people look at my car and say what a piece of **** cause it smokes.

 

I can see this... The vacume of the engine on decell pulls oil from the omp? is this possible?

 

I am not exactly sure how the OMP works, but I dont think that flooding it would make the coolant O-rings go bad. However, if they were replaced and installed wrong previously they will go bad real quick. Also, I like the fact that my car smoke cuz then people think it is a piece of ****. It already looks like one lol (you've seen it)! Did you adjust anything on the carb recently? Maybe its running rich because of the weird humidity/temps we have been having.

 

They could also be 2 completely different problems.

 

I had smoke come out of my car too. And not in just one location. My problem was my engine not being able to fully burn the feul before it hit the exhaust manifold...which caused all the smoke. Yours could be the same...good luck.

 

So a possible badly fouled plug could be the cause of the smoke???

Edit: Also know that his car is totally stock with all emissions intact.

 

I was wrong. He has rats nest but no cats and header.