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slight missfire on idle

1 reading
2.6K views 6 replies 2 participants last post by  veyron2142  
#1 ·
hi

i have got a year 2000 vw bora 2.0 8v and when i pull up to a junction it seems as tho the engine has a slight missfire but if i raise the revs it seems ok, what could cause this?

i have done a code read but no codes in the engine management.

thanks Dan
 
#2 ·
Plugs, leads, coil pack, air leak and others. Start with a fault code read.
 
#4 ·
So the engine chucking in too much fuel doesn’t seem to be the problem to you then? First of all no codes and now a too rich code. What was the fault code number and what is your engine type code?
 
#6 ·
16556 (P0172) Bank 1 fuel metering system too rich

Common causes of this are a faulty Air Mass Meter and a faulty pre cat lambda sensor.