⚠️ Vehicle not as quiet, smooth, responsive or economical as it used to be?
🚗 Here we have an Audi A4 2.0 TDI (2007 – 73,396 miles).
ℹ️ Having recently passed its MOT without any advisories, but getting thirsty on fuel and with a slight judder during the engine warm up process.
🔎 Initial inspection noted two particular issues. An excessive vibration from the auxiliary belt tensioner and an underlying wobble at idle from early stages of engine mount wear. This is something we see regularly with the 2.0 TDI engines.
💻 Initial diagnostics came up clear in terms of engine codes with just the one logged in the brakes section when it was stalled just that morning.
📊 Live data monitoring showed a decent correlation between desired vs actual exhaust gas flow through the EGR indicating it was functioning as expected. Coolant temperature levels were steady in and around a healthy 90°C and all other sensors appeared to be fine. DPF was in good order also. The only thing of note was the injection deviation amounts were somewhat erratic on idle. This could well be a result of the combination of tensioner and engine mount wobble/vibration.
👨🔧 On with the clean and although not as bad as some 2.0 TDIs we visit this one had a bass note in it which subsided as we progressed and as the overall engine vibration went the tensioner vibration and mount wobble remained – something the owner can now get addressed.
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