My fresh z6 swap will start smoking after start up. It's white smoke smells heavy of fuel( your eyes start burning). I have checked each injector buy unpluging it at the connector and seeing if it clears up and no luck. I have checked each cylinder and each is firing. I have good vacuum and the car make great power goes down the road real smooth no hickups it just smokes .

Hears a rundown of the engine set up

Full rebuild
Rods
Crank
p29 piston
All new gaskets
5 angle valve joba
little port and polish job

I think It is running rich but no check engine light so now I'm trying to figure what would cause it to start smoking. When the engine went it it ran fine for the first 100m then I was driving one day and it just started smoking. Any idea would be appreciated

 

Rings probably blew on you... Did you set the rings/ break that beast in?

 

If you think you're running rich, then pull your plugs and check them out. Or put a Brand new set of cheap plugs in, start it, and drive it around for a bit. Then pull the plugs, if you're running rich, then your plugs should be black.

 

Have you done a comepression test?

 

I am still in the brake in period the engine only has maybe 100 miles on it there is no blow by at all. I am going to check plugs today and do a compression test today and let you know my findings .

 

Today i did the compression test today and it was good all the way across damn near 300psi on all the cylinders. So its not a compression issue. I'm thinking my plugs got fouled out but the question is why did my plugs foul out.

 

What injectors are you running?
What color is the smoke?

 

stock obd0 a6 injectors with the resister box and the smoke was a grey/white and smelled like fuel there was alot of soot in the tail pipe

 

1

 

tps set correctly? When I didn't set my tps correctly, it smoked, and smelled heavily of gas.

 

How do you set your tps. This is the same tps that was on the car before this motor. Also I am going to check the map maybe try another throttle body that was I get another tps and another map sensor

 

did you check your o2 sensor? If the o2 is not reading right or bad then it could adjust the air fuel to run way to rich. Put a tester on the fuel line and read the pressure, maybe the fuel pressure regulator has gone bad.

 

i will check the o2 tomorrow. what kind of plugs are you guys running with this setup i had ngk g powers 6 heat range and they did not hold up to well

 

1

 

Maybe I need to get some regular ngk v-power plugs

 

Maybe just change the plugs but i wouldnt run anything other than regular ngk plugs. Unless you run something equlivant like denso or something, no need for the v power or iridium.