carmitage1015

Hi there,

Recently purchased 2004 Audi A4 Quatro 1.8 turbo. Has about 140k on it. When I first got it, we had coolant leak problems and we replaced plugs and coils in addition to changing out almost all plastic components of the coolant system as they were deteriorating horribly. Found another this weekend that we had missed.
Some rough idle issues so we replaced valve cover seal (and thoroughly cleaned the cover and it's in/outlets, also replaced high pressure oil hose from engine to turbo as it was seeping. Still lots of codes coming up.. Cleared them and will check again tomorrow after driving for a bit. Still have an idling problem. Intermittent misfire of #'s 1 and 2 and reading lean on them as well. What are most likely causes a "lean" situation....O2 sensor?
Also, know this car is known for insturment cluster issues, mine is doing this. Anyone know the best place to get a good, relatively inexpensive cluster?

carmitage1015

Bueler, Bueler......?

lyleswk

So I don't typically jump in cars that may have multiple issues, but what the heck.

First, no idea on dash board. Maybe someone else has.

Misfires can be caused my multiple things. Single cylinders are usually coilpacks or plugs. Multiple cylinders are usually something wrong with the vacuum system. The issue can be leaks, bad valves, etc. You will have to read up on the vacuum system and start eliminating issues.

carmitage1015

Appreciate the reply. Thank you and yep, multiple is pointing to vacuum issues on the diagnostics. Starting the hunt for "leaks" or "blockages" now.