sho_shane

Ok so iv always been a honda guy. Iv owned a few other cars but always went back to honda. Well im 25 and what im starting to see is that honda guys really have no resect for there cars. I mean most of them are bolt in motors and then just raged on till they brake then on to the next honda. Well at my age im ready to start hangging out with another croud. I mean i have kids and a famly. So I chose t go with a rx7. Its a car that gets resect, Not cus its fast just for the way to motor runs. I love the sound of a 7, the feel of being behind the seat of one. I really wanted one. So Today I took my beater honda and went for a trade. I seen the car, I did all the test. I pulled the rad cap and looked for bubbles. I had him hold it at 4000 rpm for 30sec then let off. Then I had a friend take it for a test drive so I could look for smoke. NONE!!! No smoke what so ever. I meet him at town east and traded. I even drove it all the way to greenville where I live and NO SMOKE! it ran great. I just took my wife out side to check it out. I just reved it to 8000 rpm for the 1st time and now this is what I have. Please tell me whats wrong with my new rx7. Watch the vid.

rnz520

iTrader: (10)

Ok, your car is pretty loud, but besides the point, does the smoke smell like fuel smoke? or is it oil smell? They are very different, fuel is easy to tell because it burns the crap out of your eyes.
Have you actually driven it since it did that? There are tons of reason to have a surging idle or erratic idle, look for vacuum leaks.

EDIT: I just looked at your video again and it looks a lot like fuel, you are running very rich, revving it that high you might have done something to make an injector leak.

sho_shane

Man before that one rev there was no smoke at all.

Evil Aviator

How many miles are on the engine, and what were the results of the compression check?

flaco

iTrader: (7)

is possible that they never ragged on it ..so now you ragging on it and maybe old *** seals are getting stock or the oil seals messing up but check for other stuff first cause it looks like fuel

sho_shane

I did not do a comp test. But I just pulled the TB to change the TPS. Well as soon as unbolted it I seen that the TPS he gave me was the wrong one. But I seen that oil was coming out from behind the TB?

Also I recranked the car and it does not smoke up to 4-5K but as soon as I took it to 8k again it started to smoke again. It smells like oil t me.

What have I got my self into. Whats wrog with this car?

Evil Aviator

You should always perform a compression test before buying an RX-7. Anyway, you should do one now to see where you stand.
http://www.rotaryresurrection.com/2n...ion_check.html

Um, it's nearly 20 years old, lol. In the worst case scenario, the engine just needs a rebuild, and then it should be good for at least another 100,000 miles.

clokker

iTrader: (2)

What do you mean "wrong one"?

sho_shane

Its not the right TPS bro. But back to the smoking. What does it mean when there is oil in the intake behind the TB.

jake1191

iTrader: (1)

both of my 7s smoke when revved high then they quit. My n/a more so than my TII. Neither have a catalytic converter so that contributes to it also. This may be so in your case. If it is then there are other things to check out also.

As far as a surging idle it could be the TPS or a number of other things.

TwEaK

iTrader: (6)

it actually looking like maybe the oil seals are going bad in the turbo i dont think so much motor and as for the erratic idle id say check all vacuum lines replace them with silicone and adjust TPS sounds like a healthy motor tho
TwEaK

sho_shane

My car is not a turbo car. But I do not have a cat at all. It does not smoke below 4-5K only when i take it over that. Guys I know someone out there has had this before.

As far as the cat thing goes, Did you watch the vid. There is no way it would smoke that much oil just cus the cat was pulled.

jake1191

iTrader: (1)

The cat does contribute to it. Was the car fully warmed up before this was done? personally i would change the oil to some 20w50 and see what happens then.

HAILERS

Oil behind the throttle body might be normal. The Purge valve pruges the *crankcase* fumes there.

IF it's a series four car, then make sure the OMP rod is not stuck to the full up positoin.

No smoke at low rpms, but smoke at high rpms ususally is a indication of worn oil control rings.

sho_shane

So a motor rebuild.

HAILERS

Eh, try a full oil change and have at it again. Can't hurt. It's still driveable like it is from what I can tell. What year car is this?

sho_shane

Its a 90 S5 GTU. The motor is supose to only have 75K On it. I was told that it could be the oil mettering system. If it was messed up it could be spraying alot of oil in at high rpm.

fast2g

yeah on the idle it has a vacuum leak my car does that until the engine gets hot then it idles fine and my car does the same thing if its cold and you rev it when its cold on my car its smokes white but i ive in florida and it rains and water get in the exhaust so its the typical white but on your vid. i saw blue smoke oil again my car does that as well when its cold and i rev the s#it out it will smoke blue for a few seconds then go back to normal.

sho_shane

So I just did a comp test, I got 90-93 on the front and 93-95 on the rear. Te P/S was not working on the car so I pulled it and the brakit off the car when I was there. So now I put the plugs back in it and this is hat I get when I crank it.

ifryrice

Looks like a severe failure of the control rings now! Did you pull your plugs out? Were they covered in oil at all? Looks just like my old GXL used to look when the rings were gone. When you went to check out the car at first, was it already warmed up/running before you got there?

RTRx7

iTrader: (2)

Can you get the honda back?

sho_shane

No I can not get the honda back. No there was no oil on the plugs they were dry, yes it was warm when he brout it but we let it cool so i could pull the rad cap off and I could look for bubbles. This motor ran great as of this morning.

ifryrice

Well, control rings tend to smoke more when the car sits (as the oil seeps out and pools up), then it'll smoke like a fiend until it's warm and clears out the cylinders. Does the smoke dissipate really quickly or does it linger around a good while in the air (kind of hangs there?) Does it smell sweet like coolant at all? If it's oil it's almost certainly the control rings, the S5 OMP isn't going to cause that much smoke even if it was stuck at full (in which case it'd throw an error code anyway).

If you're comfortable enough with wrenching, you could take the exhaust manifold off, and look in the ports, turn the motor over by hand and see if you can see puddles of oil on the seals as they come accross. Then let it sit overnight and come back and check again and chances are it'll be even worse.

TwEaK

iTrader: (6)

if it is oil rings and you dont have enough to rebuild... put some brake fluid in the oil it swells the oil rings helping it seal better oviously dont pour a tremendous amount just about a 1/4 of one of those small bottles if someone wants to put there input go for it but i did it and it worked and held for about 6months until i had to rebuild
TwEaK

Evil Aviator

Oh boy, it was perfectly driveable before, but now it's not looking so good.

BDC is about an hour away from you. I suggest sending him an email with a link to this forum thread.
bdc@bdcmotorsports.com