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560SEL Loses Power When Accelerating When Cold
Hi All,
I have recently noticed that my 1991 Mercedes 420SEL with 560 motor loses power when cold if I accelerate hard (not that hard). I am not sure how long this has been going on because I am very gentle with the car until it has reached operating temperature. Recently I had to accelerate harder than usual before the engine had reached operating temperature and the engine felt as if it had stalled but when I let off the gas and accelerated slowly it behaved normally. The engine idles slightly rough when cold but idles very smoothly at operating temperature and the problem completely disappears until the next time the car is started completely cold. For additional information: One of the fuel pumps was changed about a year ago though I have to check my records to see the last time that the fuel filter was changed. I think it was a few years ago. Thanks in advance for your help and thanks for all your wisdom in the past. David
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1988 420 SEL 1991 420 SEL with 560 motor 1993 Miata |
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