Hi, I have a factory 13b turbo with emissions removed.
The engine runs great but the engine runs to rich... ( you can smell the fuel coming out of the exhaust. burns your eyes).
wandering what to do?

I know that most of the engine run a little bit rich at the warm up mode..
but my engine even after warm up still runs rich... not sure what to do
thanks for help

 

Nothing you can do without a means to adjust fuel(rtek, standalone).

 

Get the car tuned

 

Just because it burns your eyes it means nothing simply removing all the emissions gear has made your exhaust more concentrated run it up on a dyno and check the mixtures only way to be sure

 

actually s4 has a trim pot by the AFM,, and s5 has an air bypass built into the AFM
both these can adjust mixes,, but not drastically,, and usually biased towards idle and low RPM runnings

the easiest way to adjust an over rich stock car is with an aftermarket FPR,, and reduce the base pressure
it will however effect mixtures all across the map

for the OP i suggest 3 initial things
new lambda probe
- exchange AFM ,, as they can get sick and amount to rich running
and also to go for an injector sonic clean

if this isnt working,, try aftermarket FPR and reduce the base pressure slightly

 

Well I wouldn't suggest lower fuel pressure on a turbo car as that is going to make it run leaner under boost. All your suggestions are band-aid fixes that are not good in my opinion!

To op, id buy a wideband and a safc or rtek if you don't want to spend the money on a standalone and go from there. Or like rx72 said run it on a dyno and see how rich it really is. It is a rotary and mine always smells like fuel!

 

are you blind or did you chose not to read all of it?
what is baindaid about
replacing a sick lambda probe
or worn out AFM
or cleaning stuck injectors?
or replacing a faulty FPR?


what is bandy **** is adding an aftermarket ECU and starting again if it is a simple fault

SAFC dont make me laugh
how is that going to work with said potentially faulty injectors or FPR ?
or how is the EPA going to deal with you in some places?

 

Bumpstart before telling someone how to lean their engine out I would sure hope they have verified thoroughly that it is actually lean if I tuned a car based on it burning my eyes their would be a lot of dead engines out their I would not touch a single thing till their is a wideband afr exhaust in their can't stress this enough

 

The car has the proper fuel pressure (when hooked to a pressure gauge) so
when you first start the car on the warm up cycle it acts like it is loading up and runs a tiny bit rough.
then when it is driven , then stopped to a idle again it runs steady, not loading up.

so it seems as if the computer or something is telling the injectors to spray to much fuel.

and either time on start up or after being ran there is still a strong fuel smoke that you can smell coming out of the exhaust

so I dont know.

 

Im not going to argue with you and clutter up this thread. Were entitled to our own opinions. My response was based on what the op posted! Your not worth anymore of my keystrokes!

 

x2!

 

I always remove the CCV (don't know how to say this in rotary terms) line that goes from the oil neck to the turbo intake elbow wen the car needs to pass emmision control.. also raising the idle makes it run a bit leaner..

Mine idle around 700rpm and afrs are low 12's, I like the smell of unburnt hydrocarbons