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Old 02-11-2003, 10:50 AM
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Thomaspin Thomaspin is offline
Join Date: Jun 2001
Location: CA
Posts: 531
Our 1981 380SLC did this

It ran so roughly it almost stalled.

Replacing the fuel injector holders/seals cured most of the problem - they were leaking. (125k and 20 years old). Inexpensive. 8 seals and holders are under $40 if you DIY. Job is similar to the 560 one on my site.

The local indy did a white smoke test (pumped into engine) and determined there were also intake manifold leaks. We still get some idle cycling, but I have yet to do the i.m. job.
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