Check engine light came on- ran code.-PO410. Replaced plugs, fuel, and air filters. Countinued to drive until car started running worse. Ran codes PO410 & (PO305)Misfiring#5. Switched #5 coil with#6. Rechecked codes PO410 (PO306)Misfiring#6. Ordered and replaced coil #6, drove with bad miss at acceleration. Light did not come on for 3 days. Checked code PO410 & PO306.
Checked plug under coil- burned. Replaced plug- same result PO410 & PO306.....??????

ANY SUGGESTIONS!!!

P0 410 has nothing to do with running problems...only for catalyst warm-up..


The running problems are due to the mis-fires.. since both of the misfire codes are on the drivers side I would start with that side of the engine..

Excessive back-pressure from the catalyst??? possible incorrect cam timing from the chain jumping??? Contamination of the fuel in the fuel rail???

__________________
MERCEDES Benz Master Guild Technician (6 TIMES)
ASE Master Technician
Mercedes Benz Star Technician (2 times)
44 years foreign automotive repair
27 Years M.B. Shop foreman (dealer)
MB technical information Specialist (15 years)
190E 2.3 16V ITS SCCA race car (sold)
1986 190E 2.3 16V 2.5 (sold)
Retired Moderator

Could it be as simple as a bad suppressor?

ASSumed that you checked & replaced them with W/coil(s)???

Just move the coils from left bank to right bank & see if the codes move with them...

__________________
MERCEDES Benz Master Guild Technician (6 TIMES)
ASE Master Technician
Mercedes Benz Star Technician (2 times)
44 years foreign automotive repair
27 Years M.B. Shop foreman (dealer)
MB technical information Specialist (15 years)
190E 2.3 16V ITS SCCA race car (sold)
1986 190E 2.3 16V 2.5 (sold)
Retired Moderator

Thanks..we will do

these cars have ign wire problems. also engine wire harness
problems. but as mentioned if miss codes are on one side then
you have most likely a plugged cat.

george