(Help)SL55 Blowing white smoke and missfiring
04-24-2017, 02:25 PM
#2
04-24-2017, 02:38 PM
#4
04-24-2017, 02:59 PM
#6
MBWorld Fanatic!
White smoke is usually indicative of a failed head gasket, that allowing engine coolant to leak into the combustion chamber. 
Trending Topics
04-24-2017, 10:35 PM
#11
MBWorld Fanatic!
I don't know how these ECUs are set up, but in some cars, once modded half throttle pulls can be dangerous as the car has advanced timing and still is out of power enrichment. You could have been using half throttle but the engine was at 15:1 A/F and more than WOT timing, with no power enrichment. It feels strong but it's not safe, and can burn pistons/valves easily during extended operation. Sounds like you damaged something and are pulling oil into the misfiring cylinders. Compression test would be my next suggestion.
That's why I always prefer a good street tune over a dyno or flash tune, you can expose the car to all parts of the tables and tune accordingly.
That's why I always prefer a good street tune over a dyno or flash tune, you can expose the car to all parts of the tables and tune accordingly.
04-25-2017, 10:05 AM
#12
MBWorld Fanatic!
[QUOTE=ItalianJoe1;7126699]I don't know how these ECUs are set up, but in some cars, once modded half throttle pulls can be dangerous as the car has advanced timing and still is out of power enrichment.
Very true and learned this the other day. I have no tune and it still happened. Got out of the throttle just a hair and AFR jumped to 17.1...to the floor again and drops to 10.5. Wont be doing that again unless down shifting or no load on engine.
Very true and learned this the other day. I have no tune and it still happened. Got out of the throttle just a hair and AFR jumped to 17.1...to the floor again and drops to 10.5. Wont be doing that again unless down shifting or no load on engine.
04-25-2017, 10:27 AM
#13
MBWorld Fanatic!
This is what I think happened
He had the notorious hiccup lean condition happen and popped a cyl or two. Same thing basically happened to denroll because he also was on half throttle but went lean and popped, he had no afr gauge at the time or else I believe he would have saved his motor.
Tuners do not tune for half throttle. This lean condition (hiccup) affects some ecus and is not year related either.
For some reason the ecu flips to a map that Makes the motor go lean
He had the notorious hiccup lean condition happen and popped a cyl or two. Same thing basically happened to denroll because he also was on half throttle but went lean and popped, he had no afr gauge at the time or else I believe he would have saved his motor.
Tuners do not tune for half throttle. This lean condition (hiccup) affects some ecus and is not year related either.
For some reason the ecu flips to a map that Makes the motor go lean
04-25-2017, 10:34 AM
#14
Junior Member
Thread Starter
Join Date: Feb 2015
Location: LA, CA
Posts: 28
Likes: 0
Received 0 Likes
on
0 Posts
Ford Taurus
Hey guys. Do you think that this could be the case of a stuck fuel injector on those cylinders. If so. Anyone have any suggestions on how to check for this?
04-25-2017, 10:51 AM
#15
Sorry for your loss, sounds like disassembly and rebuild or replace with a known good motor is due
You can check for a stuck injectors by swapping with a known good set or just swapping suspect injector for another known good faultless injector.
Let me know if you want to throw me a deposit and I will mail you a known good set that came out of my car
04-25-2017, 10:55 AM
#17
MBWorld Fanatic!
You were throwing massive amounts of boost at this car with no fueling mods nor cooling. You were not logging either. It was a matter of time. Sometimes I wish these guys who sell parts tell their customers that they need supporting mods!
The following users liked this post:
shardul (04-25-2017)
04-25-2017, 12:29 PM
#18
Junior Member
Thread Starter
Join Date: Feb 2015
Location: LA, CA
Posts: 28
Likes: 0
Received 0 Likes
on
0 Posts
Ford Taurus
Hey guys. I got the turge tank off. Seem to be a little pooling of oil in cyl2 and just a tad bit in cyl 3. Does not look to have any coolant or fuel mixed in. Its believed to be only oil. Im not a mechanic. What exactly does this mean? Possible valve cover gasket? Or do i sound stupid.
04-25-2017, 12:34 PM
#19
That blew compression on Cyl 2 and it appears #3 has a similar issue; oil is getting by and you need a new motor, rebuild yours or get a used one...
Other's have said the same thing... sorry we all have bad news
Valve cover gasket would just **** oil all down the side of the motor... NOT inside
Next build add more fuel, meth and cooling mods to stave off detonation and be on par to keep your motor and investment safe
Last edited by BoostedAero; 04-25-2017 at 12:41 PM.
04-25-2017, 12:46 PM
#21
If you have never pulled and installed motor from a pickup truck or v8 car... do not start with this chassis... bite the bullet and take it to someone to drop in a used motor.
If you are even considering this, you should be able to look in the engine bay and see what needs to be done to remove the motor and trans....
Things are way too complicated and the space is too tight on this engine bay to attempt this chore even with mechanical experience points
If you are even considering this, you should be able to look in the engine bay and see what needs to be done to remove the motor and trans....
Things are way too complicated and the space is too tight on this engine bay to attempt this chore even with mechanical experience points
The following users liked this post:
shardul (04-25-2017)
04-25-2017, 07:32 PM
#23
MBWorld Fanatic!
Join Date: Jan 2016
Location: In the Shadow of the Tetons
Posts: 2,180
Received 660 Likes
on
477 Posts
2013 ML350 Bluetec
(Help)SL55 Blowing white smoke and missfiring
Hey guys. My SL55 has been giving me issues the past couple days. Omw back frm the track i gave her about half throttle on the highway up to about 120mph. Then the check eng light came on. Pulled over and noticed that it was missfiring. I limped her back home and decided to look at her the next morning because it was already dark. I pulled 3 codes. Cyl 1 missfire, Cyl 2 missfire, and The random cyl missfire code. I swapped the coils for cyl 1 and 2 with cyl 3 and 4. And still said 1&2 were missfiring. Not only were they still missing but the car was now blowing clouds of white smoke out the pipes. I then took out the spark plugs on the left side and ALL 8 were horrible. There was no tip on one of the plugs in cyl 2. I will post pix. So i bought new plugs for the entire left side and replaced them. I used NGK IRIDIUMS. Starter her up and again, still missing on cyl 1&2. And still blowing clouds of white smoke. I then checked the coolant level. It was and still is normal. No oil that i can see in the reservoir either. There is also a little of the white smoke coming from the engine bay. But not much. Could be the wind blowing the exhaust under the car. Could be an exhausr leak. Idk. The clouds get more intense with more throttle. I hadnt taken it anywhere yet to have it diagnosed because i plan on purchasing a warranty and waiting the trial period, then as they say ( fake ) a breakdown. Just incase its serious. But if you guys have any insight to what may be going on without taking it in. That would be great.Thanks.
The following users liked this post:
Elhonaz (04-29-2017)
04-25-2017, 09:18 PM
#25
MBWorld Fanatic!
