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Hi All,
I have 2.0 slow Beetle which is hard to start when cold. It takes a few goes and sometimes 2 or 3 cylinders splutter into life at first instead of all 4. Once running it can be a bit sluggish for about the first minute (feels like flat spotting).
After this everything is fine and it runs like normal. If the car has been started in the past few hours it starts up without issue. As it cools down it becomes harder to start. e.g. 5hr of parking might need 2 short goes to start it instead of 3 long goes from dead cold. After being parked outside overnight it's hardest to start.
The car doesn't have many km on it (60000km) and the engine feels strong (stronger than another Beetle I have with more km). Compression checks out very well on all cylinders (slightly better than the other Beetle).
I thought it might be the MAF sensor but apparently not since I've swapped to a known good MAF sensor. The fault codes from VCDS are not really useful, it just comes up with "Cylinder (insert random number from 1-4) Misfire". There doesn't seem to be consistency between the cylinder misfire faults when I clear them.
Anyone have any ideas? Fortunately I have the luxury of being able to swap parts between another mechanically identical car, but before I go doing that, what should be my next course of action?
I have 2.0 slow Beetle which is hard to start when cold. It takes a few goes and sometimes 2 or 3 cylinders splutter into life at first instead of all 4. Once running it can be a bit sluggish for about the first minute (feels like flat spotting).
After this everything is fine and it runs like normal. If the car has been started in the past few hours it starts up without issue. As it cools down it becomes harder to start. e.g. 5hr of parking might need 2 short goes to start it instead of 3 long goes from dead cold. After being parked outside overnight it's hardest to start.
The car doesn't have many km on it (60000km) and the engine feels strong (stronger than another Beetle I have with more km). Compression checks out very well on all cylinders (slightly better than the other Beetle).
I thought it might be the MAF sensor but apparently not since I've swapped to a known good MAF sensor. The fault codes from VCDS are not really useful, it just comes up with "Cylinder (insert random number from 1-4) Misfire". There doesn't seem to be consistency between the cylinder misfire faults when I clear them.
Anyone have any ideas? Fortunately I have the luxury of being able to swap parts between another mechanically identical car, but before I go doing that, what should be my next course of action?
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