Lumpy tick over petrol smell

PAULPA66

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I have a C180 4 door Kompressor 2004. Since my last MOT the engine tick over is a bit lumpy and smells of petrol. This happened after they revved car for emissions test, prior to this it was ok.

Another ( may be related) i have engine management light on, can anyone recommend a tester i can buy for engine codes and to test this car please
 
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PAULPA66

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Would this be a good diagnostics tool or is there one that could be used on other cars too?
 
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martyz

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Do you get a rattle on start up? and what's your mileage?
 
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PAULPA66

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Hi, not noticed any rattle, mileage about 70k.
Definitely only started after the rev they give it for emissions test

Runs fine at normal running rev.
 

martyz

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Have the codes read at a MB specialist with Star diagnostics first.
 

martyz

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Did not want to worry you,but quite likely,they stretch and the cam gears wear too.
 
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PAULPA66

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Big bucks?

Just started it, definately no rattle
 

martyz

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To supply and fit chain and gears and associated bits around £1500 at an MB specialist.
Nothing stopping you DIY if you are an above average home mechanic.I would run it past
a specialist first,about £40 to plug in to star and pick his brain at the same time.The above
is worse case scenario,could be coil pack going down,codes read should reveal.Hope you
get a good outcome.
 
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PAULPA66

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martyz Thank you.

Could i buy a diagnostics as above find the codes myself? or best to get someone out like you say.

Um runs like this, (sounds better though) https://www.youtube.com/watch?v=1DnQQPyoSqs

I guess Mass Air Flow Sensor too.

Diagnostics it is lol
 
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PAULPA66

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Yeah, will try find someone local, in meantime i,ll clean the mass airflow sensor even i can do that lol
 
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PAULPA66

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just bought some CRC AIR SENSOR CLEAN MASS AIR FLOW METER CLEANER 200ML.
No i wont touch it, 15 squirts on sensor, and a few on connector. (according to youtube) ;-)
 

martyz

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Sounds good.:thumb:
 
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PAULPA66

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Be nice if engine light goes off, petrol smell goes and car idles as it should.. Can but hope.
I will update when done let you know.
 
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PAULPA66

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Bought a cheap diagnostic tool gave me
P0102 maf
P0172 maf
P0301 Random/Multiple Cylinder Misfire Detected cyl1
P0303 Random/Multiple Cylinder Misfire Detected cyl3
P0304 Random/Multiple Cylinder Misfire Detected cyl4
P0362 coil

Some may be old as had plugs etc changed 6 mths ago

is it worth resetting then see what comes back as fresh faults?
 

martyz

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Yes clear the fault codes, did cleaning the MAF work?
 
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PAULPA66

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Yes clear the fault codes, did cleaning the MAF work?
Well, not sure as i have bottled it at the moment reading about that clip down the back, the rest of process looks simple enough but think i need one of these to proceed. I did change all my brake pads though ;-)
 

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PAULPA66

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Interesting, reset codes, warning lights off and it is running at higher rev(normal) and not lumpy.( when i say lumpy i mean ticking over about 600rpm and not really smooth)

Need to give it a run out see if light comes back when warmed up
 
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