C30 1.8 petrol (non FF) shaking at idle, starting issues

Ben1985 · Mar 27th, 2022, 20:05

Greetings, I just joined this forum.

Bought a 1.8 petrol C30 a few months back as a daily (mostly city) and as much as I love the car, I maybe should not have bought the cheapest one in my area. Car had tons of work dones to it, it sat under a tree for 18 months before it was sold, so brakes are new, timing chain done, oil is new etc. Only the flywheel and cluth need to be done, still.

Currently I am tracing a shaking engine at idle IF the engine is warm. Under load, this does not happen, fuel economy and power are normal. Enine idles stable at around 900 RPM.

Sometimes, when I hot-start the engine, it does not start at first attempt, except if I give it some throttle whilst cranking.

Spark plugs are new, same goes for the coils, nothing changed. Happens with all kinds of fuels. Shaking is noticeable for example, when you drive and stop at a red light. Car has done 125 k miles. Throttle body is cleaned.

I am posting in a UK forum because the German forums are more like a bar fight than helpful discussion.

This is my first Volvo - I also have a 406 Coupé V6 that I restored, so I am now learning the Swedish way of tinkering.

Mar 27th, 2022, 20:05	#1
Ben1985 New Member Last Online: Mar 28th, 2022 02:02 Join Date: Mar 2022 Location: Berlin	C30 1.8 petrol (non FF) shaking at idle, starting issues Greetings, I just joined this forum. Bought a 1.8 petrol C30 a few months back as a daily (mostly city) and as much as I love the car, I maybe should not have bought the cheapest one in my area. Car had tons of work dones to it, it sat under a tree for 18 months before it was sold, so brakes are new, timing chain done, oil is new etc. Only the flywheel and cluth need to be done, still. Currently I am tracing a shaking engine at idle IF the engine is warm. Under load, this does not happen, fuel economy and power are normal. Enine idles stable at around 900 RPM. Sometimes, when I hot-start the engine, it does not start at first attempt, except if I give it some throttle whilst cranking. Spark plugs are new, same goes for the coils, nothing changed. Happens with all kinds of fuels. Shaking is noticeable for example, when you drive and stop at a red light. Car has done 125 k miles. Throttle body is cleaned. I am posting in a UK forum because the German forums are more like a bar fight than helpful discussion. This is my first Volvo - I also have a 406 Coupé V6 that I restored, so I am now learning the Swedish way of tinkering.

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