c32 misfire
Thread Starter
Newbie
Joined: Nov 2015
Posts: 4
Likes: 0
C32
c32 misfire
just purchased a project C32 , which has several issues which i will be working through , but the cylinder 2 misfire is quite confusing. Car runs fine up to 3000rpm , but when the engines exceeds 3000rpm number 2 cylinder misfires and EML comes on and stays on . Stop the car and turn off ignition and misfire and EML is still present , if i disconnect battery for 15 minutes then restart everything is back to normal, At present i can run the car all day below 3000 revs with no issues , i have swapped coil packs and spark plugs between number 1 and number 2 cylinders , and no difference . So its not coil , plugs or leads , i am suspecting the injector unless anyone else can shed some light , OBD reader code is P0302 (cylinder 2 misfire) apologies for the long winded 1st post.
Thread Starter
Newbie
Joined: Nov 2015
Posts: 4
Likes: 0
C32
c32
thanks for reply , its a 2002 , i have located a new black bosch injector , 0280 156 072 which is specified for the car , so will fit and see if this is the solution , the wiring looks ok , on coil pack and injector. If injector cures the problem , might be advisable to get the other 5 injectors cleaned after 162000 miles
MBWorld Fanatic!
Joined: Oct 2004
Posts: 4,152
Likes: 60
From: NJ, NYC
Something Slow
im having some misfire issues too I replaced my plugs a wires 2-3 months ago because I was getting Random misfires but it only happen at WOT last time I had a misfire
P0108 Manifold Absolute Which always happen when WOT
P0305 Bank 5
P0300 Random Misfire
I removed the coil packs and plugs to check for oil on the plugs
and I remove the Surge Tanks to check for Coolant Leak and everything is clean..
P0108 Manifold Absolute Which always happen when WOT
P0305 Bank 5
P0300 Random Misfire
I removed the coil packs and plugs to check for oil on the plugs
and I remove the Surge Tanks to check for Coolant Leak and everything is clean..
MBWorld Fanatic!
Joined: Mar 2004
Posts: 2,073
Likes: 27
From: North NJ
2002 C32 AMG, 2013 GLK 350/4, 2015 E63S AMG Wagon
I did not want to bring up the cams yet but that is why I asked for the year for the car. 2002 and early 2003 models have the pressed on cams. They were replaced in 2003. Usually the cam issue happens with the first or last cylinder (1,3,4,6), and out of that cylinder #6 seems to be happening more often. But it can and has happened to any of the 6 cylinders.
But I have also helped a member here (c32used) with a similar misfire issue. After replacing the #3 injector the issue went away. So, try the injector. The cam is the worst possible problem since it can not be confirmed 100% until that bank of the engine is taken apart.
But I have also helped a member here (c32used) with a similar misfire issue. After replacing the #3 injector the issue went away. So, try the injector. The cam is the worst possible problem since it can not be confirmed 100% until that bank of the engine is taken apart.
Thread Starter
Newbie
Joined: Nov 2015
Posts: 4
Likes: 0
C32
cam
stripping the top of the engine would be a last resort , the car has done 162000 miles , but the motor really is sweet , (a testament to the build quality of these engines) , i have just replaced the supercharger pulley bearing, changed supercharger oil and engine oil/filter and the engine is very smooth and quiet now. Today i went on a 200 mile round trip and after about 30 miles with the engine nicely warmed up the misfire did not occur , redlined the car and had no issues , and went up to some highly illegal speeds (on a private road of course ! Just sold a W211 E55k and the C32 is not far behind its got the same supercharged mid range grunt ,quite impressive) ,but it appears i could have a random misfire on cylinder number two when the engine is not up to temperature , scratching my head now
, i will go ahead and fit the new injector ,but fairly sure it is a electrical/sensor fault rather than a mechanical issue.
, i will go ahead and fit the new injector ,but fairly sure it is a electrical/sensor fault rather than a mechanical issue.
Trending Topics
Newbie
Joined: Nov 2018
Posts: 1
Likes: 0
2003 c32 amg
Please help!!!
Hey guys I've got a c32 amg, cylinder 6 misfire won't go away! New plugs wires and coils, I pulled the fuel rail and confirmed the injector is good and I'm kind of stumped on what else it could Be! Really hoping it isn't the cam but the oil looks good and doesn't look like it's a head gasket, any help would be much appreciated!
MB World Stories
The Best of Mercedes & AMG
Manual Mercedes? 6 Times Sindelfingen Let Drivers Have All The Fun
Verdad Gallardo
Mercedes SLR McLaren 722 S Is Extremely Rare Example Modified by McLaren
Verdad Gallardo
8 Classic Boxy Mercedes Designs That Have Aged Like Fine Wine
Verdad Gallardo
Flawlessly Restored Mercedes 190E Evo II Heads to Auction
Verdad Gallardo
Electric Mercedes C-Class Unveiled: 11 Things You Need to Know
Verdad Gallardo
Mercedes EQS Gets A Major Update: Everything You Need to Know
Verdad Gallardo
5 Underrated Mercedes-Benz Models That Don't Get the Love They Deserve
Verdad Gallardo
Mercedes 300D Has Pushed Well Past 1 Million Miles and It Ain't Stopping
Verdad Gallardo
10 Most Reliable Mercedes-Benz Models You Can Buy Used
Verdad Gallardo
Junior Member
Joined: Oct 2013
Posts: 41
Likes: 4
'02 C32 (S203)
Hey guys I've got a c32 amg, cylinder 6 misfire won't go away! New plugs wires and coils, I pulled the fuel rail and confirmed the injector is good and I'm kind of stumped on what else it could Be! Really hoping it isn't the cam but the oil looks good and doesn't look like it's a head gasket, any help would be much appreciated!
Super Member
Joined: May 2013
Posts: 522
Likes: 15
2002 C32AMG
I would start swapping injectors. Much cheaper/easier than pulling apart that side of the engine to confirm it's the cam.
