weird one

RobVT

Active Member
Jun 30, 2009
99
0
Redcar
on the way home this morning i had boost and then no boost, then suddenly started backfiring on the run down then eventually conked out.

would not start, just popping through the exhaust unplugged maf waited 2 minutes started up got home will boost fine without maf, plugged maf back in starts up fine seems to rev fine, no dodgy noises at all

im not sure what to check i am awaiting vag-com to check but has anyone else had this ?
 

SlimsLCR

Active Member
Jul 16, 2014
401
1
Northern Ireland
Weird one is right, I cant see it being mechanical anyway, like you say it running fine again, gotta be electrical, as usual! Vagcom might shed some light. I had same symptoms with coil packs but it threw the epc light on.
 

RobVT

Active Member
Jun 30, 2009
99
0
Redcar
well there was a nasty smell (like sewage) i thought it was the wagon infront but go past him and had a spirited drive along some dual carriageways i had full boost in 2nd nothing in 3rd nothing in 4th and then it started backfiring then by the time i coasted to roundabout it cut out and wouldnt start just popping and banging through the exhaust trying to start, waited 5 mins then it fired with the maf unplugged

it was about 5 miles away when i overtook the wagon till it stopped, i have been out in it since and it seems to boost fine
 

SlimsLCR

Active Member
Jul 16, 2014
401
1
Northern Ireland
Maybe the smell was coincidence and it just took a head stagger and sorted itself out! Id still stick it on vagcom to see if any codes are stored. You know yourself the bloody cars are full of sensors, could be anything!
 
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SlimsLCR

Active Member
Jul 16, 2014
401
1
Northern Ireland
Maybe MAF, I'd do what the other guy said and get a quick VAGCOM scan for faults



That would have been the next obvious choice when it went ok after being unplugged, but I was under the impression it would have defo threw a light on before it was unplugged! But hey when it comes to electrics in cars im happy to admit im no expert, I just go by my own previous experiences!
 

RobVT

Active Member
Jun 30, 2009
99
0
Redcar
put it on VCDS and obviously the maf problem and also a camshaft position sensor (g40) but cleared went for a spirited drive and was fine
 
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