Hey, my 1990 crx dx has a ZC motor swap, and its still in the shop because for some reason its smoking BAD. Everytime you push the gas it moves then stops then moves. The smoke that is coming out is VERY rich, and when i say smokes it comes out in HUGE black puffs(Gas not oil). The code was saying the o2 sensor is bad, we replaced that and its not helping. I have also read that the Teg ECU's make the ZC run rich, but that rich? So in overall for some reason the car is geting flooded. Someone please help me it would be very helpfull! thanks

Things we have Replaced:
-o2 Sensor
-TW sensor

 

Try replacing the ECU with the one meant for the motor. Have you cahnged anything in the fuel system? Injectors ect?

 

The motor is completly stock, and the Tec ecu is the correct ecu, zc is from a integra. Its the American ECU i think its PG7?

 

And when i said black puffs i mean like SMOKE BOMBS, you cant see out the back window, muchless anyone drive through the smoke, thats how rich it is! Please help. thanks

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Hondacrx1990si &raquo;</TD></TR><TR><TD CLASS="quote">And when i said black puffs i mean like SMOKE BOMBS, you cant see out the back window, muchless anyone drive through the smoke, thats how rich it is! Please help. thanks</TD></TR></TABLE>

hold a screwdriver to your injectors and make sure they're clicking all the same.

and check your oil for fuel dilution.

 

what size injectors? maybe you just need some sort of fuel control to lean yourself out a bit more? also what kinda fuel pressure are you running?

 

have them test the pressure at the shop to see if its over 40 psi

could be fuel pressure regulator or faulty injector

is the ecu still stock?

also check for proper injector pulse from the ecu with a multimeter.

 

Everything in the motor is stock, the ECU is a 89 Teg ecu. The injectors are making the clicking noise but im not sure if its all at the same time. Thanks for the info keep it comin, im trying them all!

 

try a PM6

 

you might want to check your rod bearings your piston rings or even your head gascet check your zeals what color smoke is it??

 

yoyu could use a regular si ecu

 

Its not oil smoke its GAS, the smoke is PURE black. Black clouds of "Smoke" rich in smell, ( car is not drivable)

 

i would check the piston rings...

 

thanks for the help so far everyone, keep the questions and answers comming, im sure one will work. thanks

 

check compression.