Slow acceleration and high fuel consumption (190E 1.8)
Thread Starter
Newbie
Joined: Jul 2012
Posts: 9
Likes: 1
From: Sydney, Australia
2013 GL350 Bluetec / 2014 S350 Bluetec
Slow acceleration and high fuel consumption (190E 1.8)
I've still only had this car for just under a month and I'm still testing it out making sure it's running well... and I don't think it is.
Lately I noticed the acceleration is fairly low and fuel consumption is pretty high.
I filled up 33L of 91 unleaded when tank was just before empty and reset the milage counter.
The fuel light is gonna go on any minute now, and its only done 155km (city driving).
Lets say its used 30L so far, that brings down the fuel economy to:
19.35L/100km or 12.1mpg (US Gallon) which is terrible, especially for a 1.8 engine - pretty much double the consumption it should be going at.
I began researching on the issue, and many with similar issues seem to be having slow acceleration, and now that I think about it, the acceleration is really sluggish.
Research suggested its a fuel issue possibly caused by: Air Flow Meter (AMF), Electro-Hydraulic Actuator (EHA), Oxygen Sensor, Fuel Injectors, etc...
Some info that may be relevant:
-Starts first time every time without a problem (even cold).
-Rough idle/Engine vibrations, sometimes more than others (engine mounts are probably worn though).
-Clean exhaust, minimal carbon deposits.
-Sometimes has rich fuel smell, most noticeable after opening engine bay.
-Pressure "pop" when I open fuel cap.
I can't seem to find much information online such as DIYs on how to remove the airbox, AMF, EHA etc. I don't know where to begin, would greatly appreciate being pointed in the right direction. Most of the information I come across are for 2.3L engines and such, not 1.8
I can't seem to locate the oxygen sensor, is it meant to be under the car? Or somewhere on the intake manifold?
Thanks in advance!
Lately I noticed the acceleration is fairly low and fuel consumption is pretty high.
I filled up 33L of 91 unleaded when tank was just before empty and reset the milage counter.
The fuel light is gonna go on any minute now, and its only done 155km (city driving).
Lets say its used 30L so far, that brings down the fuel economy to:
19.35L/100km or 12.1mpg (US Gallon) which is terrible, especially for a 1.8 engine - pretty much double the consumption it should be going at.
I began researching on the issue, and many with similar issues seem to be having slow acceleration, and now that I think about it, the acceleration is really sluggish.
Research suggested its a fuel issue possibly caused by: Air Flow Meter (AMF), Electro-Hydraulic Actuator (EHA), Oxygen Sensor, Fuel Injectors, etc...
Some info that may be relevant:
-Starts first time every time without a problem (even cold).
-Rough idle/Engine vibrations, sometimes more than others (engine mounts are probably worn though).
-Clean exhaust, minimal carbon deposits.
-Sometimes has rich fuel smell, most noticeable after opening engine bay.
-Pressure "pop" when I open fuel cap.
I can't seem to find much information online such as DIYs on how to remove the airbox, AMF, EHA etc. I don't know where to begin, would greatly appreciate being pointed in the right direction. Most of the information I come across are for 2.3L engines and such, not 1.8
I can't seem to locate the oxygen sensor, is it meant to be under the car? Or somewhere on the intake manifold?
Thanks in advance!
Thread Starter
Newbie
Joined: Jul 2012
Posts: 9
Likes: 1
From: Sydney, Australia
2013 GL350 Bluetec / 2014 S350 Bluetec
UPDATE
jacked up the car earlier and found the damn O2 sensor. I dont have a multimeter to check whether its giving an acceptable voltage range, but I did try and unscrew it to check if it was burnt out... no luck.
Drowned the thing in WD-40 and didnt wanna budge
ALSO
Took off the air filter box and took a look underneath, this is what i found
Photo Album - Imgur (gallery)
I first noticed the breather hose was quite loose, and after pulling it out, it noticed that most of its circumference had been broken off, but it appears that it has been intentionally cut out...(no idea why).
And I noticed that the engine and surrounding components are quite oily, you can see in the images along the line of the engine cover theres a deposit of oil
The fuel distributor, EHA, ICV, etc all seem to have oily residues.
After playing around with the breather hose it cracked (added it to my list of new things to buy), but in the meantime i put a bit of strong super-glue adhesive that seems to hold it well (for now).
I put one of those worm drive rings ( http://www.gd-wholesale.com/userimg/...clamps-682.jpg ) around the broken end of the breather hose, seems to be held tighter now.
After I started it up, noticed white smoke come out of the exhaust when revved higher, but after a spin around the block, the smoke stopped, just clear exhaust afterwards.
Idunno what else to do right now, those are my observations, thoughts?
jacked up the car earlier and found the damn O2 sensor. I dont have a multimeter to check whether its giving an acceptable voltage range, but I did try and unscrew it to check if it was burnt out... no luck.
Drowned the thing in WD-40 and didnt wanna budge
ALSO
Took off the air filter box and took a look underneath, this is what i found
Photo Album - Imgur (gallery)
I first noticed the breather hose was quite loose, and after pulling it out, it noticed that most of its circumference had been broken off, but it appears that it has been intentionally cut out...(no idea why).
And I noticed that the engine and surrounding components are quite oily, you can see in the images along the line of the engine cover theres a deposit of oil
The fuel distributor, EHA, ICV, etc all seem to have oily residues.
After playing around with the breather hose it cracked (added it to my list of new things to buy), but in the meantime i put a bit of strong super-glue adhesive that seems to hold it well (for now).
I put one of those worm drive rings ( http://www.gd-wholesale.com/userimg/...clamps-682.jpg ) around the broken end of the breather hose, seems to be held tighter now.
After I started it up, noticed white smoke come out of the exhaust when revved higher, but after a spin around the block, the smoke stopped, just clear exhaust afterwards.
Idunno what else to do right now, those are my observations, thoughts?
