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#1
05-05-2012, 04:35 PM
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car misfires intermittently m103
Hi guys,been having this problem for a while car misfires while idling in traffic(feels like shuddering) and trying to eliminate plugs(new) wires(fairly new)rotor & cap (fairly new-no arcing) any suggestions for a quick remedy will be appreciated.
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#2
05-05-2012, 07:37 PM
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Quote:
 Seriously, a fuel cleaner, (techron) , ot redline would do wonders. I have a theory that a leaky injector can cause an issue. I'll let you know if it works.
__________________
Eugene 10 E63 AMG 93 300te 4matic 07 BMW X3 14 Ford F-150 Fx2
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#3
05-05-2012, 08:57 PM
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My m103 also felt like it was stumbling badly at idle when I got it. New plugs, cap, and rotor didn't help. Put new motor mounts in and smooth as silk. (Unfortunatly, at the time I didn't know "uro" means JUNK!) I now need to replace them with good ones.
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Some days are like licking ice cream from a spoon, today is more like trying to staple jello to a brick! 1990 300 SEL
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#4
05-06-2012, 01:43 AM
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Have you checked the type and condition of the spark plugs themselves? M103 are pretty sensitive to worn/dirty/improper plugs. Once the valve stem seals on the engine harden/leak, the plugs can quickly foul and cause poor operation of the engine.
__________________
-diesel is not just a fuel, its a way of life-  '15 GLK250 Bluetec 118k - mine - (OC-123,800) '17 Metris(VITO!) - 37k - wifes (OC-41k) '09 Sprinter 3500 Winnebago View - 62k (OC - 67k) '13 ML350 Bluetec - 95k - dad's (OC-98k) '01 SL500 - 103k(km) - dad's (OC-110,000km) '16 E400 4matic Sedan - 148k - Brothers (OC-155k)
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#5
05-06-2012, 12:58 PM
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car misfires intermittently m103
Hi pasoSD,thanks for your input.plugs recently replaced,valve seals replaced last year,and all you other forum members who chimed in I think I will go for the fuel injector cleaner and injector replacement,lets see if problem is rectified.thanks all.
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#6
05-06-2012, 03:22 PM
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Fuel mixture settings can also affect idle, as well as the age of the injectors themselves, and whether or not the idle control valve is clean/functioning properly.
__________________
-diesel is not just a fuel, its a way of life- '15 GLK250 Bluetec 118k - mine - (OC-123,800) '17 Metris(VITO!) - 37k - wifes (OC-41k) '09 Sprinter 3500 Winnebago View - 62k (OC - 67k) '13 ML350 Bluetec - 95k - dad's (OC-98k) '01 SL500 - 103k(km) - dad's (OC-110,000km) '16 E400 4matic Sedan - 148k - Brothers (OC-155k)
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#7
05-15-2012, 12:25 AM
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car misfires intermittently m103
Hi guys,finally found my misfiring problem,was a cracked #5 cylinder ignition lead.I guess it broke during removal.problem solved by replacing wires.now engine is smooth as silk,now i need to get the proper adjustment of throttle cable to linkage system.also am going to replace the thermostat as the eng temp is too low for too long after starting and running for sometime.
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