Slightly more black smoke.
#1
![Default](https://www.s2ki.com/forums/images/icons/icon1.gif)
Hi all
quick specks.
Ap1, stage 2 cams and valve train, AEM EMS.
I noticed my s2k's muffler tips are getting black faster, also when I wot I can see some Black smoke on the back.
I had my AEM air/fuel gauge off since I wanted to re route it so I don't know exactly if the ratio was affected.
Coolant is ok, oil is ok. Smoke is not blue or white is pitch black. I used to have a turbo civic and it did that too coz it was slightly richer mixed. But on the s2k could a defective spark plug cause that?
quick specks.
Ap1, stage 2 cams and valve train, AEM EMS.
I noticed my s2k's muffler tips are getting black faster, also when I wot I can see some Black smoke on the back.
I had my AEM air/fuel gauge off since I wanted to re route it so I don't know exactly if the ratio was affected.
Coolant is ok, oil is ok. Smoke is not blue or white is pitch black. I used to have a turbo civic and it did that too coz it was slightly richer mixed. But on the s2k could a defective spark plug cause that?
#3
![Default](https://www.s2ki.com/forums/images/icons/icon1.gif)
Originally Posted by RockyMountainS2k,Apr 12 2010, 08:38 AM
hook up the uego again and check, a dead spark plug with cause this too but you'd have a check engine light about a miss fire would you not?
Need to check them
#4
Registered User
![](https://staticssl.ibsrv.net/autocomm/Content/S2Ki/milestonestars-10yr.png)
Join Date: Mar 2005
Location: Flintstone GA
Posts: 12,471
Likes: 0
Received 0 Likes
on
0 Posts
![Default](https://www.s2ki.com/forums/images/icons/icon1.gif)
Originally Posted by RockyMountainS2k,Apr 12 2010, 12:38 PM
hook up the uego again and check, a dead spark plug with cause this too but you'd have a check engine light about a miss fire would you not?
I'd start with a plug check for sure.
#6
![Default](https://www.s2ki.com/forums/images/icons/icon1.gif)
With AEM (which is what I got too), you really need to set temp correction tables in order to keep the AFR the same. Intake air temp table needs to be very precise, with the weather getting warmer and all.
I had that problem, but with AFRs going to the lean side.
Somewhere on this forum I saw correct tables someone had posted. They actually took out the engine coolant sensor, and made measurements as they were warming up the sensor. Then they took the readings, and extrapolated them onto the EMS's chart, and they were different. So EMS is reading temperature wrong.
But the new (correct) temp/voltage settings need to be entered into the EMS _before_ you tune.
Same goes for the air intake temperature sensor.
I had that problem, but with AFRs going to the lean side.
Somewhere on this forum I saw correct tables someone had posted. They actually took out the engine coolant sensor, and made measurements as they were warming up the sensor. Then they took the readings, and extrapolated them onto the EMS's chart, and they were different. So EMS is reading temperature wrong.
But the new (correct) temp/voltage settings need to be entered into the EMS _before_ you tune.
Same goes for the air intake temperature sensor.
#7
![Cool](https://www.s2ki.com/forums/images/icons/icon6.gif)
Originally Posted by Kirpich,Apr 12 2010, 01:39 PM
With AEM (which is what I got too), you really need to set temp correction tables in order to keep the AFR the same. Intake air temp table needs to be very precise, with the weather getting warmer and all.
I had that problem, but with AFRs going to the lean side.
Somewhere on this forum I saw correct tables someone had posted. They actually took out the engine coolant sensor, and made measurements as they were warming up the sensor. Then they took the readings, and extrapolated them onto the EMS's chart, and they were different. So EMS is reading temperature wrong.
But the new (correct) temp/voltage settings need to be entered into the EMS _before_ you tune.
Same goes for the air intake temperature sensor.
I had that problem, but with AFRs going to the lean side.
Somewhere on this forum I saw correct tables someone had posted. They actually took out the engine coolant sensor, and made measurements as they were warming up the sensor. Then they took the readings, and extrapolated them onto the EMS's chart, and they were different. So EMS is reading temperature wrong.
But the new (correct) temp/voltage settings need to be entered into the EMS _before_ you tune.
Same goes for the air intake temperature sensor.
I will perform normal maintenance and if problem persist go for a re tune.
Thank you for pointing that map issue !
Thread
Thread Starter
Forum
Replies
Last Post
Apex1.0
S2000 Under The Hood
17
08-26-2014 03:45 PM