Hi guys,


Have put 6000 relatively trouble free miles on it.


This week, it had a little hiccup going up a hill which quickly evened out, and a bit more during random acceleration.


I changed my oil Friday night and suddenly would run like **** under any load, idle is still fine, but any throttle and it starts to shake and run bad. It won't get over 20mph.



1) checked the plugs and coils which were replaced this year, everything seemed ok


2) checked fuel pressure, good at 32psi


3) oil pressure is good, cooling system is working


4) timing is still where I had it, 10btdc


5) oil level is correct


6) cap and rotors seem fine, they are relatively new as I installed a pertronix back in November



The only work I have done recently is the oil change and replacing the timing chain tensioner with a genuine mercedes one, as I had some chain noise at idle before the pressure would come up. Hasn't been back since I put the new tensioner on.

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1973 280SE 4.5