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Mr Miyagi

01-03-2015 02:16 AM

Lack of power C180 W202

Lack of Power C180 W202
Hi there

My 97 C180 has a power problem...when I startup in the morning she idles smoothly, but as she gets warm she starts misfiring, backfiring and jerks or chokes. When I pull away she misfires, backfires and chokes asif the fuel is not coming through at al but once I'm on the go she smooths out and runs cleanly all the way up the rev range. Until I slow down or gear down and then accelerate then she starts with her crap.

What I have done:I replaced all 4 spark plugs and the 2 coil packs (all purchased from the agents). I also cleaned out the MAF and the throttle body but still I have the very same problem.

Please advise on the way forward as it is seriously eating into my petrol account apart from the fact that it is really not comforting to know that your first wife is as ill as mine.lol

Thanx

au.hanson

01-05-2015 10:40 AM

Lack of power C180 W202

First thing you should do now is to check your plug wires for current leakages. You would better be able to do that at night in the dark while putting up your ignition, with your hood open, observe the plugs compartment for visible little sparks. If any, replace the plug wires. Replace all of them

If there was non, then next thing to do is to make sure that you battery is supplying adequate current to the system. To be sure of this , install a hundred amps battery and check yur OVP, your problem is over. Good luck

If all above are all ok, then check your fuel filter as the last resort.

Chopper99

01-01-2018 05:17 PM

My 1998 model doing the same thing???

Russell Ormerod

01-02-2018 02:29 PM

Battery will not cause this issue, check your fuel pressure. Did you replace the suppressors too? Maf needs to be replaced if faulty clearing will not help, what spark plugs? Should be FR8DC4 in a bosch

Chopper99

01-03-2018 06:55 AM

c180 w202 misfire

I have a similar problem.it starts fine but after warming up it seems to run on 3 cylinders but if you flick the key on and off quickly it drives normal for a couple of miles the back to misfire somewhere.... any answers ?

Russell Ormerod

01-03-2018 07:17 AM

It's probably switching an injector off, due to misfire detection

Chopper99

01-03-2018 12:22 PM

Maf

When I unplug the maf it runs similar better up to 4000rpm then limp mode

Russell Ormerod

01-03-2018 01:56 PM

What's the history? Any work done on the car prior to the problem?

Chopper99

01-03-2018 06:59 PM

It's a 1 owner full service mercedes history up to date I don't think it's had a lot done to it

Chopper99

01-03-2018 07:01 PM

I've phoned mercedes they told me it's never had any repair work done just service work and wheel bearings and breaks and general stuff

Russell Ormerod

01-04-2018 02:52 AM

You need to start in depth diagnostics now,

Chopper99

01-04-2018 11:58 AM

Thanks very much russell

Chopper99

01-05-2018 03:05 PM

Put maf from 2002 c180 frog eye now it runs and drives with out going into limp mode but still not running 100 percent but an awful lot better any answers

Russell Ormerod

01-06-2018 01:39 PM

Probably you found the fault, the airmass. Adaption data needs to be cleared with a scan tool. Maybe that's why its not perfect, you could leave that maf in and see if it adapts itself after some days of driving

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