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#1
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ML320 Runs really Rough Sometimes
My MY 2000 has always had a small problem that seems to be getting worse.
When the engine is cold and if I put the engine under a bit of load then it starts to run really rough (no power , won't rev , idles at about 1,00 rpm really roughly). If I turn off the engine and restart it always fixes itself immediately. It has done this since new and the dealer has never been able to fix it. I have had the MAF, CATS, and plugs replaced in the last 2 years and thes ehave not fixed the problem (they were rpelaced for different reasons though). I assume the computer is getting it's knickers tied in a knot as I assume that by restarting the engine I am resetting the computer ? Any other ideas ? thanks Doug |
#2
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What you are describing is injector shut-off. That happens when the cylinder misfires badly. When you re-start the engine the misfire counter re-sets.
I would think that you possibly have a bad spark plug wire OR coil..
__________________
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 |
#3
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thanks, - just one more question , would the injector shut off log any error codes ?
I had the codes read last time I had the car serviced and it read faulty O2 sensor right hand side and faulty brake light switch (the BAS and ETS lamps did illuminate once about 6 months ago, but never since). The dealer suggested not replacing the O2 sensor as he didn't think it would fix the problems I was having. thanks Doug |
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