From the workshop
It ran as though an injector had gone down. Diagnostics found an intake manifold so full of carbon the swirl flaps could not move, and a MAF sensor with part of it broken off.
43 seconds, with captions. Full transcript below.
This Volvo that we had in was a Volvo XC60 with a 2.4 diesel engine in there.
Customer reported that the, the car was running rough, um, almost as though an injector had gone down.
So we, we ran some diagnostics through it and we found that the, the intake manifold was actually that full of carbon that the swirl flaps weren’t, weren’t activating in the manifold.
That was just completely full of carbon.
Um, also found that the, the MAF sensor, that was that full of carbon that the part of the MAF sensor is actually broken off.
So that’s probably why the, the management light threw on, along with the swirl flaps not being able to move.
So with this one, we just ordered a complete new manifold, swapped all the bits over, put a new MAF sensor in it, fitted it all back together, and that one, that actually ran really well after we, after we changed all them bits.
The customer described it well: it ran as though an injector had gone down. Diagnostics pointed somewhere else entirely, at the air going into the engine rather than the fuel. Fitting an injector on the strength of how the car felt would have cost money and left the real fault in place.
Swirl flaps sit inside the intake manifold and open and close to change how air flows into the cylinders. On this XC60 the manifold was so full of carbon that the flaps could not move at all. Elliot says that, along with the broken MAF sensor, is probably why the engine management light came on.
The MAF sensor measures the air coming into the engine. This one was so full of carbon that part of it had broken off. A complete new manifold went on with the parts swapped over, plus a new MAF sensor, and the car ran really well afterwards.
The diagnostics page explains what you actually get for the fee, why a code reader on its own is not a diagnosis, and what happens if we cannot find the fault.
How our diagnostics work, and what they costEvery one filmed in the Dudley workshop, with the mechanic who did the work explaining it.
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