There has been a long running thread on this issue recently. I posted
links to some pictures of the rack damper bolt on my 1982 300 TDT's
617's injection pump. I have tried various things to get rid of the
thumping at idle. It shook so hard it shook the trim piece off my
right front fender.
The pump and injectors were rebuilt about 2 years and 20,000 miles ago
when I had the engine remanufactured at Metric Motors in Cayhoga Park,
CA. The injection pump was rebuilt at Pacific Injection Service in
South San Francisco. It's still under warranty and Gus, the main
engineer there is going over the pump and injectors. So far he hasn't
found any problems. I should hear from him early next week.
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