I been having a problem of my exhaust really smelling bad! I know it's because I have altered my vehicle's stock setup. I've done some research and have a few ideas on what to do. Any suggestions from some of you guys? Or what would you do if you just wanted your TII as a daily driver and to run efficent?


MODS:
87 TII
Rebuilt engine
Ported s5 turbo
Full RB setup 2.5+FCD
TID & cone filter
Upgraded oil pressure regulator
removed emissions/egr,acv,cats,oil bypass pellet,pump gone
koyo rad


One thing I need to do is upgrade the fuel pump but I'm only running stock boost (5.5lbs).

 

well you are smelling your car becuase you removed the cats. mine smells the same, granted you have a tii and i have a n/a, but the same principle applies.

 

standalone engine management and tune tune tune, because the stock maps are rich as heck, most people simply cannot get decent mileage on the stock maps for a TII. I experience this first hand as well.

 

There has to be some combo to get the car to not run so rich. I've read about AFC's and leaning out the midrange. Or a CDI to help spark ETC....

 

Yeah, it's just that AFC's typically aren't as refined/precise. You can do fuel modification that way at least. Standalone would give you total control over ignition timing as well though, AFC's don't do that. Timing can make a HUGE difference in power and fuel economy, but you can also wreck your motor if you don't know what you're doing with either timing or fuel modifications.

 

What are you running? Did you notice an improvment in mileage and no smell?

 

haha, I'm still running a stock ECU except that I have an Rtek 1.7 chip in it, which I believe essentially still uses stock maps except it handles some extra fuel management for higher boost levels and retards timing a bit if you get above I think 9 or 10psi. Since tuning is currently the last of my worries I haven't bothered to refresh myself on the details of it. I regularly get 15-17mpg mixed driving, and I have fairly new injectors, new fuel filters and 255lph pump, running about 12psi max boost and I drive fairly hard. However I've tried babying it before and I don't think I've ever topped 19mpg. I think some people have, but meh, like I said I have bigger issues on my '7 to deal with and a ~30mpg dd to save on gas with. The '7 still smells but it's not an issue unless I'm sitting still in a small enclosure or the wind blows exhaust in. If you're smelling exhaust/fuel/oil/coolant what have you while moving more than a few mph then you need to look for respective leaks.

A common fuel smell can come from the charcoal canister though, but don't assume a fuel smell is coming from that because fuel leaks are way too risky to bet that a fuel smell is just the charcoal canister acting up.

 

Well seem to getting about 12 MPG which tells me something can be improved. Some other things that are installed---

NEW - Fuel filter
s5 pulsation dampner
Prof cleaned injectors
Oxygen sensor


Would a bad Oxygen sensor cause it to run really lean? When putting my downpipe back on I kinda bent the top of the sensor. It didn't break off but was bent.

Another thing is in the pic below the red aarow is pointing to a peice that connects to the line for the charcoal canister. It has an aarow on it and it is pointing the same way as the blue aarow. Is this correct? You may also notice that the lines have oil on/in them.

Thanks to all who help!!!

 

I think it would cause it to run really rich, yielding less power and shanking your gas mileage. Your picture's too small for me to tell what you're asking about, but I do see that you have an unshielded intake filter, you would most likely benefit from putting the stock airbox with snorkel on the car if it will fit (it may not with that radiator). As it is, you're pulling in a lot of hot air which pretty much doesn't help you in any way.

 

just a suggestion man... if you use the car as a daily driver you shouldn't have taken out the emission controls... but if you want that flame comming out of the exhaust and u rev the engine really high.. then u're gonna end up going through a lot of o2 sensors.... since the high heat transitions kills them