Re: Flat spot from cold start
Hi guys! I think I am experiencing the same sort of problem with my 145. However, to me it feels like the car governs itself not to rev higher then 2500 rpm until the engine reaches ±70ºC. I also strongly believe in not revving an engine more then 3000 rpm until it is at operating temperature, but this still doesn’t seem right.
I bought the car brand new and as long as I can remember it behaved this way. Initially I thought this is the way it works to protect the engine, but after driving a 156 with the same type of Twin Spark engine, I realized something must be wrong. I had the lambda sensor checked out and diagnostics checks performed, but it always appeared to be in working order. Someone also told me it could be that the lambda needed to warm up before giving the correct signals through to the ECU. Could this be true?
The car has done 125 000 km now and lately it seems to have a lack in performance above 4500 rpm. This is felt more clearly when I really accelerate hard with a fully opened throttle. Might this be caused by the MAF not working properly anymore? Could it be the lambda sensor not reading properly? The variator does rattle a little bit with a cold start but quiets down quickly. Could it be the variator causing the loss in performance?