'94 E500 Unable to rev above 3500 RPM

[John Epstein]

I have an '94 E500 with 140k Miles (Superchip/K&N's/17" AMG monoblocks) mostly stock in immaculate shape - all bodywork perfect and a brand new radiator and A/C system after a minor fender-bender justified a BIG insurance claim

A week after I got my car back from having all the cosmetics and the cooling systems replaced, the engine got very ill... When I kick-down or rev up to 3500 RPM, the engine becomes shakey and burps and misses on all cylindars, it seems, and after I let go the accelerator, it continues to shimmy and burp for at least 20 seconds, which makes me think the engine has become flooded?

I am guessing that the Catalytic converters are still ok, so I am thinking wiring harness/plugs/distributors may be shot?

Anyone else have an opion or advice?

Thanks in advance,

John Epstein
Toronto, Ont.
mailto:Johnny@mobile.ca