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#1
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Loss of power
My wife called me at work and said she bearly made it home the 95 C220 suddenly idled rough and had no power (well know this 4 cyl eng is guttless) but this is alarming. I hooked up the scanner and it gave me a code P0304 cylinder 4 misfire. Any ideas? Thanks in advance.
98 ML320 97 C230 95 C220 95 318ti |
#2
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Start by checking ignition components - Plugs, wires, cap and rotor (if that car has a cap and rotor)
Inspect all your plugs. If the one in cylinder 4 is dramatically different from the others, there may be something going on in that cylinder that is fouling the plug. If there is no obvious cause in your ignition system, then I'd check the cyl 4 injector.
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-tp 1990 300SE "Corinne"- 145k daily driver - street modified differential - PARTING OUT OR SELLING SOON - PORTLAND OR. AREA - PM ME FOR DETAILS 1988 560SEL "Gunther"- 190K passes anything except a gas station 1997 S420 - 265k just bought it with a rebuilt trans. Lovely condition |
#3
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Loss of Power
Well I swapped parts to see any improvements so far no luck. R & R sparkplugs, sparkplug wires, OVP,fuel pump relay, fuel filter, cam position sensor. Still the same hesitation (misfire) next will be the fuel pump & the ignition coils. Yes I threw parts on it but most of these parts I already have with me.
No check engine light, no codes stored.This thing is kicking my a*s 98 ML320 97 C230 95 C220 95 318ti |
#4
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Maybe exhaust blockage....one bad cyclinder while certainly noticeable, should not affect power to where your wife barely made it home...Can happen dramatically if something breaks loose in the exhaust train.
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#5
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Bad ignition coil
With the engine on idle I pulled each spark plug wire one by one when I got to the number 4 wire there was no difference when the sparkplug wire was pulled off. Now the fun part of replacing this coil which is mounted under the intake manifold.
98 ML320 97 C230 95 C220 95 318ti |
#6
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Car update
C 220 running fine after replacing both ignition coils, found out the wire harness ($$$!) is not that healthy and would need attention in the future.
98 ML 320 97 C 230 95 C220 95 318ti Last edited by sdpartz; 05-12-2009 at 11:37 AM. |
#7
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i just did one of these and had to replace that wiring harness as well.
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David S Poole European Performance Dallas, TX 4696880422 "Fortune favors the prepared mind" 1987 Mercedes Benz 420SEL 1988 Mercedes Benz 300TE (With new evaporator) 2000 Mercedes Benz C280 http://www.w108.org/gallery/albums/A...1159.thumb.jpg |
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