Rough idle/misfire problem
#1
Rough idle/misfire problem
I have a 2002 A6 3.0 (AVK) and I have just finished replacing the passenger side head gasket. After getting it all back together, I am experiencing very rough idle. I am showing multiple misfires in cylinders 4, 5, and 6 (entire drivers side). The engine smooths out when you rev it above idle. The symptoms sound like a vacuum leak, but I smoked it and found no leaks. Any insight?
Last edited by frizle2001; 07-24-2009 at 04:57 PM.
#3
Probably HX is right about the timing, since you have no vacuum (or gas) leaks.
By the way: did you make sure you installed the h-gasket with the lettering facing upward?
Anectode:
I changed a couple of months back both head gaskets and, after putting the engine back together, I happened to slip in the EGR gasket only on one bolt. Is a pretty tight place with everything installed over there, so I didn't notice it was fastened wrong. I could have bet my life on it I installed it right. Obviously when I wedged it in, I did a poor johb holding it in place while trying to get both bolts on.
Least to say I had a pretty bad leak and when I first started the car it was idling pretty rough and with an audible hissing.
By the way: did you make sure you installed the h-gasket with the lettering facing upward?
Anectode:
I changed a couple of months back both head gaskets and, after putting the engine back together, I happened to slip in the EGR gasket only on one bolt. Is a pretty tight place with everything installed over there, so I didn't notice it was fastened wrong. I could have bet my life on it I installed it right. Obviously when I wedged it in, I did a poor johb holding it in place while trying to get both bolts on.
Least to say I had a pretty bad leak and when I first started the car it was idling pretty rough and with an audible hissing.
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