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#1
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G'day All, new here but wonder if I might find a few new ideas ...
I got a Merc 450 V8..'76 and first of the K Jets and pre pollution. The problem is a vacuumn advance ping that I don't believe is because of the low octane Super we get nowadays. Advanced curves are spec. KJet is right where the engine likes it . Have compared comp press' with same year engine that didn't ping. Only thing I don't know is the profile of the crown of the pistons . I wonder whether the ping is some swirl experiment that was easily sent into detonation..??? I think the engine might be a '75 engine ....the fuel head has a solenoid at the back thats refered to only as '75 models |
#2
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There are a few things that will cause this. One is engine temp being too high. One is incorrect ignition timing and one is low octane (below 89) in conjunction with the above.
------------------ Benzmac: 1981 280GE SWB 1987 16V ASE CERTIFIED MASTER AUTO TECHNICIAN SERVICE MANAGER FOR 14 BAY FACILITY MERCEDES SPECIALIST 8 YRS PARTNER IN MERCEDESSHOP.COM |
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