theobeck47
Seat Toledo Engine Knocking Combustion
Summary of the thread
A 2002 Seat Toledo with a gasoline engine is experiencing knocking combustion, characterized by reduced engine power, jerking during acceleration, and blackish smoke. The suspected cause is deposits in the combustion chamber. A suggested solution is to check the knock sensor and consider professional cleaning of the cylinder heads. The issue was resolved by cleaning the combustion chamber, resulting in smooth engine performance.
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4 comment(s)
theobeck47 (community.author)
The smoke is blackish. I haven't checked the knock sensor yet, but I will. What was the eventual problem with your Toledo?
anni_nacht75
Blackish smoke points to rich running – too much fuel. Mine turned out to be carbon buildup in the cylinder heads causing pre-ignition. I tried some engine tuning additives but no luck. In the end, I had to get the heads cleaned. Honestly, I'd get it checked out by someone who knows their stuff. Could save you a headache.
theobeck47 (community.author)
Thanks for the confirmation and advice. I took it to a workshop and they confirmed deposits in the combustion chamber. They cleaned it, and now it runs smoothly. Total cost was 425€.
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SEAT
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TOLEDO
anni_nacht75
Engine knock on a Toledo, huh? Sounds familiar! I had something similar happen with mine – same jerking and power loss. Did you check the knock sensor? Could be faulty. Also, what kind of smoke are you seeing? Blueish, blackish, whitish?