Running a 97 GSR engine, I/H/E, when I get into my high RPM's (6-7000) I puff a little bit of black smoke. Its not constant and its not blue, its black. So I'm pretty sure I'm not burning oil or have gas in my oil. I think I'm running rich, but without a VTEC controller, is there any way to remedy this? Or am I missing the problem?

p.s. I just replaced plugs and wires.

 

sounds like you are running rich, check your ignition timing and set back to stock and make sure you didn't advance the timing

 

its better to run rich than lean

 

Do a compression or leak-down test to see if you're having internal problems. Sounds like you might be getting some blowby, but that happens to a lot of cars. Black smoke is oil I think, try to see if you are losing compression through the rings?? There really isn't a way to lean your car out mechanically, except lowering the fuel pressure. VTEC controller is your best bet(cheapest) in fuel control.

 

Can you elaborate, I assume a mechanic can do the leak down test? What type of internal problems might be the soource? I thought blue tinted smoke was oil, and black smoke was unburnt gas? Its like a puff of black powder is coming out (If you can imagine that) for about two to three seconds when I'm in my high RMP's. I get clean exhaust the rest of the time, no white, no blue, no black smoke.

Sorry if I sound like an idiot, but I'm a computer geek who loves my teg, just trying to care the best for her.

 

what ecu are you running? stock or a modified OBD1 ecu?

 

stock ecu

 

and are you getting any check engine lights and if you are, have you checked what code its throwing?

 

are yor running with a gutted cat or test pipe????if so this could possibly be your problem!