brianmcd

Hey guys. My friend has this smoking problem... His FB puts out white smoke while shifting under WOT, and under normal WOT right after it's warmed up. I'm thinking he might be running too rich, because the smoke is white. It isn't blue, so it's not oil burning. Do you guys know what it might be? It doesn't happen when he's not under WOT. I'm thinking it might be his a/f mixture, or his secondaries. Could the secondaries be putting too much fuel in somehow? Thanks a lot for your help.

~brian

REVHED

White smoke when shifting at WOT is a symptom of worn oil control o-rings. The sudden change in pressure caused by letting off the throttle pulls oil past the seals and into the combustion chamber. Another sign is higher than usual oil consumption.

BTW, dark smoke is usually an indication of a rich condition.

mar3

iTrader: (8)

Does the white smoke have sweet smell? Could be he's drawing coolant into the chambers, which is also very bad, however.....

REVHED

That's a possibility as well.

Has your friend said anything about loosing water or oil?

brianmcd

My friend said there is no coolant loss, and only marginal oil loss, as in the normal amount rotaries like to eat. So you guys think it's the oil control o-rings? Thanks.

~brian

smile444

While we're at it, another question:

What does it mean if there is a fine black film on the inside of the muffler tailpipes? It will recolor a finger with a single swipe!

MIKE-P-28

iTrader: (1)

Its called pretty much normal, cold exhaust heats up, creates moisture, then the deposits from burning fossil fuels gets wet, presto instant black soot...

While on the same subject how do you think exhaust systems get so eaten up? The water that the hot/cold etc creates mixes with these deposits and creates a sort of acid and it eats the exhaust system from the inside out

brianmcd

Also, what should he do to fix the problem?

mar3

iTrader: (8)

Your friend is not being honest with himself as to what the problem might be. ONE of those two has to be consumed to generate the white smoke at high rpms after the engine is at normal operating temperatures. It cannot come from nowhere and is definitely not a normal rotary characteristic unless it's a dying engine. Until he makes an honest evaluation of which one it is, no one can make an accurate diagnosis of his problem. Ask if the white smoke has a sweetish smell...

79+80+84_rx-7

my car smokes at the *** at 7 K rpms, ect.... And at first I didnt think I was loosing water, but I know I am now....... Doesnt seem like much, so run it hard for a day, and then go home and check it... whats the gauges closesly also......