[A4] And then there were three....
Greg at rhodyrentals.com
Thu Aug 19 22:06:45 EDT 2004
Ignition amplifier on top of the airbox is toast.
> -----Original Message-----
> From: a4-bounces at audifans.com [mailto:a4-bounces at audifans.com]On Behalf
> Of Andy Hellmann
> Sent: Thursday, August 19, 2004 8:21 PM
> To: a4list
> Subject: [A4] And then there were three....
> This afternoon, driving down Hampton Blvd, the A4 lost a
> cylinder. I noticed it accelerating away from a light, it was
> shuddering and making less power. No noise, no fuss, it was just
> gone. "OK", I think, "I've been hit by the dead coil pack bug".
> I got home and once the car cooled down a bit, I did some
> troubleshooting. Pulled off the connectors from teh coil packs
> one at a time, and there it was, #2 cylinder. So I pulled the
> #1 coil pack and swapped it with the #2. Problem stayed with the
> #2 cylinder. I pulled the spark plugs from both 1 and 2, and
> swapped them. I also noticed that the #2 plug didn't smell
> gasoliney, and was dry as a bone. Not all that suprising being
> as the engine is very warm, but you'd think there would be a
> little gas on it. Problem stayed with #2 cylinder. I broke out
> the book and the voltmeter, and found that the connectors for
> both #2 and #1 had 12 volts on the outside pin, a good connection
> to ground on the inside pin, and teh same milivoltage on the
> other outside pin with the engine running. So I guess teh wiring
> is good.
> Turned my attention to the fuel side. I could the #2 injector
> clicking, and it noticeably stopped when the connector was
> pulled. So I pulled the whole rail off and switched the #1 and
> #2 injectors. Success! the misfire switched to the #1 cylinder.
> Now, this is what's interesting. Oh, by the way, a single
> injector is $150. Crazy, aint it? I pulled the #1 injector
> out, sprayed some carb cleaner into the orifices, blew them out,
> shook it, tapped it, caressed it and sweet talked it.
> Reinstalled, started engine, guess what? Problem is back on #2
> cylinder. I don't have my compression gauge, that would be my
> next check, but the plug looked fine and there wasn't any
> indication of any mechanical problems, I.E. clanking, clattering,
> etc etc. Engine sounds exactally the same as it did before,
> except for having a misfire. Anybody got any ideas? I put
> VAG-COM on it, and the only trouble codes were for misfire #2
> cylinder, random misfire, and open injector circuts on #1 and #2
> cylinders, not unexpected as I was pulling the connectors off.
> Cleared codes and restarted, the first two codes returned.
> Nothing else.....
> Any ideas?
> Thanks in advance,
> "A little nonesense now and then
> is treasured by the wisest men"
> Andy Hellmann
> VA Beach VA
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> A4 at audifans.com
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