friedrichkrause86

Vauxhall Vectra Engine Knock

I'm having a rough time with my 2007 Vauxhall Vectra (gasoline engine). It's got 140733 km on the clock and lately, I've noticed a distinct engine knock, almost like combustion is happening at the wrong time. Alongside the knocking, I'm experiencing reduced engine power, jerking when accelerating, and some smoke from the exhaust when I put my foot down. The ECU has also thrown an error. I suspect pre-ignition or detonation due to deposits in the combustion chamber. Anyone else experienced similar?

A 2007 Vauxhall Vectra with 140,733 km is experiencing engine knock, reduced power, jerking during acceleration, and exhaust smoke, with an ECU error indicating potential pre-ignition or detonation. The suspected cause is carbon deposits in the combustion chamber. The solution involved a chemical clean and spark plug replacement, resolving the issue and restoring the car's performance.

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4 comment(s)

That sounds familiar. I've got a Vectra too, although I can't remember the year right now, and I had a similar issue a while back. Engine knock, loss of power, the whole shebang. Did you check the cylinder heads at all?

I haven't pulled the cylinder heads yet. I was hoping it wouldn't come to that. What did the issue turn out to be on yours? Was it definitely combustion chamber deposits causing the engine knock?

Yeah, pretty sure it was combustion chamber deposits causing detonation in my case. Honestly, save yourself the hassle and get it checked by someone who knows what they are doing. It can get nasty really quickly.

Thanks a lot. I appreciate the advice. I took it to a workshop and it turned out to be heavy carbon deposits in the combustion chamber as we suspected. They did a chemical clean and replaced the spark plugs. Cost me 425€, but it's running like a champ again!

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VAUXHALL

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VECTRA