F6 Loss Of Power After Coils/ Sparks And Service

[Ralph Wiggum]

Symptoms would normally point towards a collapsed cat or muffler (loss of power/reduced exhaust noise) Very odd that it's started after a service though.

Tbomb silly questions but engine oil is overfull by any chance?

[tbomb]

Appreciate the help guys . Engine oil is at normal levels there has been rattling coming from the cat which I will be looking into this afternoon could possible be a blockage but strange that it was instantaneous after coils, sparks, service ect I'm hoping for simple solution

[tbomb]

Still at a loss checked all hoseing for vacuum leak found nothing, inspected turbo and exhaust seems to be all in order checked coils and sparks fitting ect still no fix

[arronm]

Blocked cat or blown hose. Bet its blocked cat.......

Is the turbo noisy as it spins down

Edited 15/09/15 01:20 PM by arronm

[julesk_1972]

How was the exhaust checked?

[tbomb]

Flutter out the wastegate has become very quite aswell. Also taking and extra 1000 or so revs from normal to even start winding up and boost is very minimal. from the checks last night turbo spins smoothly with no unusual sound once winding down.spins freely with no movement on turbine or noise, no signs of rubbing or warn blades. All bolts also seem to be in order.

Pipeing is all aftermarket and doesn't cross the top of the engine so to remove the cover to reach Sparks and coils no pipes are disrupted or disconnected . Exhausts was checked just by removing the 02 sensor on dump pipe with no change, this afternoon I will remove exhaust before the cat and hope for the best .

[julesk_1972]

Remove the cat is easy.

Certainly sounds like something is plugged up.

[tbomb]

Thanks mate I'll give it a go this afternoon and see how it goes

[tbomb]

Took the exhaust off from infront of the cat with no real change in performance did notice aswell a wire/ sensor behind the engine on the exhaust side that has completely melted. I wouldn't have any idea what it's for but seems to be connected to or runs with the wires connected to the coils. Will have a closer look after work

[Ralph Wiggum]

That's the cam angle sensor. If that's cooked your VCT won't be working and it will cause the engine to produce less power.

Also +2 internet points for returning and updating what you found.