This Audi S4 V8 had a misfire at idle. We traced the problem to one of its camshafts being out of time.
A big job behind a rough idle
Camshaft timing controls when the engine’s valves open and close. When that timing is wrong, it can affect how the engine runs. On this car, correcting the timing issue meant a substantial repair.
We carried out a full reseal and timing-chain replacement. The workshop photos show the engine and exposed timing assembly during the job.
Back together, misfire fixed
With the work complete and the engine back together, the idle misfire was resolved.
Every misfire needs its own diagnosis. A rough idle alone does not tell you that an engine needs timing chains, so the first step is to establish what is causing the problem on that vehicle.
If your Audi has a misfire or another running problem, come and see us at Speedwell in Frankton, Hamilton. Call 07 846 2137 or book online.
