p0300 301 302 303

harvey

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can any one help i have 2001 c320 mis-fire fault told to change mas which i have done ,worked fine for a bit then fault came up again told it might be spark plug coils is there any way to test them:)
 

television

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Where did you buy the MAF from
 
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harvey

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it is a bosch from euro car parts
 

jibcl500

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You need diags running to see what the faults are, Ive seen a few V6 in the last few weeks with ECU failure, coil packs, ecu and MAF are all related, one takes out the other.

jib
 
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harvey

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do i take the car to mercs
 

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OK P0301 is a miss fire and 0302 is cylinder 2 and 0303 is cylinde 3 so there you have, a coil pack or it should be
 
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harvey

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what sort of price would they charge
 
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harvey

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is water in the fuel rail simple to check
 

Cole@MBS

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No, it means stripping the whole rail of, cleaning it all with carb cleaner and refitting it all, takes time and care!
 

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Would it be worth unplugging the MAF just in case it has gone down
 
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harvey

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once i unplug what should i do or look for
 

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once i unplug what should i do or look for

Many cars drive with full power again when unplugged, idle may be rough,but try it,just pull out the plug
 

Cole@MBS

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Wouldnt cause a mis on just the two, you would have mis-fires across the 6, know a bit about the V6s!!!
 
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harvey

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could it be the maf or shall i take it to a tech with star
 

Uncle Benz

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Cylinders 1,2 and 3 (corresponding codes 301, 302, 303) are all on the right hand bank, viewed from the drivers seat. Water in the rail is a good suggestion, but I would also be looking at anything common to just that bank. Lambda sensor fault or a blockage in the cat maybe.
 


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