Brown smoke during heavy excelleration

[GTOreturns]

It a 93 LX with appx 140,000 miles on a stock motor cept for T-Moss/Thumper combo. I was going on the highway today and punched it out to get on. There was heavy brown smoke coming out the back, I looked like a crop duster! Its done it for a while. My smog pump isnt hooked up to the x pipe, its just pumping out air at the bottom. WTF?? Brown smoke?

Any help would be greatly appreciated. Thanks!

 

[bullitstang1313]

White smoke usually equals coolant burning, blue smoke usually equals oil burning, black smoke usually equals too much fuel burning, but I've never heard of brown smoke before.

 

[GTOreturns]

anyone? Hissin? Daggar?

 

[gcwh02]

are you sure its not a blackish smoke?

 

[GTOreturns]

are you sure its not a blackish smoke?

yeah its dirty brown. I had to let off the gas,it was reallll bad!

 

[68torinogt]

have you run injector cleaner through it yet? and ill bet you have some carbon buildup

 

[bynummustang]

Your car is taking a poop.








I have no clue on brown smoke.

 

[68torinogt]

its probably black that looks brown, i say this needs to be diagnosed like black smoke and do a tune up and check the ingnition system

 

[bynummustang]

Check plugs, see how they look, and report back.

 

[spiff]

Are you sure it wasn't just dust? If you have an o/r pipe it will kick up a bit, especially if you have dumps haha

 

[GTOreturns]

The plugs have 30,000 miles on them, its got a screamin demon ign system, the fuel pressure is down to 33psi, like I said, its been doing it for a long time. And I have cats on it!! I keep the fuel pressure this low in the warm months cause it runs faster like this. Im stumped!

 

[68torinogt]

is that the only thing you notice is the smoke?

 

[Darkwriter77]

You're burning dirt.

Seriously, though, it might be a combination of burning BOTH oil and coolant that's leaking into the combustion chamber - head or intake gasket, mayhaps? I dunno, trying to think of anything else that would cause that color of smoke...

 

[GTOreturns]

I never did retorque my intake!