So I thought that the reason my car was running so rich was that it needed to be tuned. Reason I had spotted it was running rich was there was black build up on my back bumper. I want to get the car painted but don't want the black stuff to ruin the paint so i'm trying to figure out what the problem is. Here are the results for the dyno.

 

I speant hours on hours trying to figure out why my car ran rich it was just missing the map sensor o-ring....thus reading a higher vac all the time so it(ecu) thought i was always at/near WOT even when just cruzing around. if you have access to a s300 i recomend hooking it up. can tell you a WORLD of what's going on or even go buy one. did you ask you'r tuner

 

Go back to your tuner

 

Does that graph show anything bad, he said air/fuel ratio is where it is suppose to be now. s300 is hondata? Don't I need the hondata ecu to use s300?

 

Well are you'r plugs black ? and no it'll fit into any ecu really

 

My plugs were black prior from running so rich for a while. I haven't changed them yet. Also when you tune your car do they put a rpm limiter on it?

 

well clean them ! lol how can you know 100% then wipe you'r rear bumper also. im not sure on that AFR

 

Will the rich residue on the spark continue the issue haha? I rubbed off a section with my shoe to see if that mark would darken as well, and it still did haha. Quite embarassing to have all the black crap on your bumper on a while car haha. Looks like it was near fire haha. Trying to get this all fixed before the beginning of May so I can finally get the car painted in time to be picked up for my birthday haha. If you could help figure this out that would be much appreciated.

 

use a wire brush on them(the plugs) and some brake clean. or just go get some new plugs and see if they black(get carbon build up) then the issue is still rellavant if not great as for the soot on the rear my car is white also and it looked like **** with that. but keep in mind dust collects there also. take a pic of the plugs you have in there now

 

Ill keep you posted tomorrow. Storm coming tonight so i'll post pictures tomorrow. Thanks for the help haha.

 

Also I've seen where it builds up in the exhaust and after the problems fixed it continues to blow **** out for a while. Clean the plugs drive for a while then check them again.

 

Sounds good, what about cat? Could that be holding it all and just releasing it?

 

Mine did for a week of short trips. If you clean up the plugs drive then check them and they look good, is clean the back of your car off a few times and see if the amount starts to taper off. If the plugs are still black, keep looking for the problem. I remember one time I had the seals in my turbo go bad and it **** oil into my exhaust. I swapped back to the normal manifold but the oil in the cat caused my car to smoke for 2 days. I started to get worried that it had done damage.

 

Ill do that tomorrow, thanks. Ill keep everyone posted. Hopefully this will get fixed in time haha.

 

i'm assuming the red line on the afr graph is after the tune? that's stupid rich. turbo cars dont even run that rich.

either whoever tuned your car doesnt know wtf they're doing, or you have something wrong with the engine. seeing as how you got tuned at church's, i'm going to assume the latter.

 

The blue is after tune. The red was what it was before. That's why I thought since it's been fixed the black build up would be fixed haha.