Hey guys,
I just bought me my first Evolution also my first boosted car. The previous owner installed a lot of after market parts and had it tuned at kozmik motorsports in Houston Texas. The black smoke it produces on boost is crazy. The afr is 14.5ish at idle and I think it was 20s in the higher rpms. I'm just looking for some advice on the richness and any other modifications that would be recommended would be greatly appreciated. The mods so far.

Bride Lowmaxx Racing seat

Evasive motorsports Seat rail

Ohlin R/T coilovers

ETS V2 Extreme Turboback exhaust with HFC

ACT 6 puck clutch

Fidanza pro-lite flywheel

Advan RSDF Forged 18X10.5 +24 offset

Michelin Pilot 4S 285/35R18 (all 4)

Hawk HP + pads with Brembo brakes

Turbonetics Electronic boost controller (3 way)

BOSCH Injector Dynamics 1300 CC injectors

Fully Custom Carbon Fiber Weel from NRW (NELSON RACING WHEELS)

2 POD pillar for Guages

Innovative motorsports EFC-1 Guage, ALL in one- ETHANOL guage, A/F, FUEL pressure and fuel temp

Innovative Motorsports Boost Guage with shift light

Extreme Turbo Systems (ETS) Intake with MAF

Walbro 450 fuel pump.

Thank you again. No trolling would be nice 😁

 

That's a lot of fuel for a stock turbo.

I'd start by lookin for boost leaks. Does it misfire or just run really rich? I know if I were to buy a heavily modded car, I'd want it looked over by a local tuner if possible.

 

What’s the afr gauge say at WOT?

 

I will let you know about the afr at WOT when I get off today. She doesn't have any misses going on she's just running really rich. Literally cleaned her drove 2 miles and she was covered on the *** with black sprinkles lol. I figured the fuel injectors and their size might of had something to do with it

 

Some black out the exhaust in boost is normal for these cars on pump gas. Let us know what full throttle AFR is.

 

This.

 

Stop listening to what your friends are telling you. If it has no cat then you will get "black sprinkles" on the bumper as you drive. So far nothing you've shared with us is indicative of the car running rich.

 

He's running a cat and his comment about crazy black smoke sounds like a rich condition to me. To Razorlab's point, the AFR readings at full throttle under boost will be definitive.

 

20s in the higher rpms would be lean.
check whats at full throttle do a 3erd gear pull from 2000rpms to redline and check your afr gauge.

 

my afr on idle is 14.5 at WOT its 12.4 and cruising in 4th no gas 22.5

 

So it’s running lean, not rich. I’d get that tune looked at ASAP.

 

Also I've noticed 4th gear pops out sometimes. If I hold the shift nob and give it throttle I can feel it pulling it towards neutral. I've read maybe synchronizers or shift fork?

 

Check the tune asap

 

Does anyone know what the vacuum pressure should be? I'm -22 on idle and it goes into the 8s on boost maybe more. Also the psi was in the 60s today cruising in forth? Does this sound normal?

 

-18 to -20 with stock cams. -6 to -10 with cams. Dependent on the elevation of course.

It should be positive pressure when in boost, because well, that is what boost is. :P