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Registered
Join Date: Feb 2001
Location: South of the Mason-Dixon Line
Posts: 3,722
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Thanks. Unfortunately I do not have the fuel pressure testing equipment to evaluate my fuel pressures. CIS has always been a pain in the butt and having the first unit in a Porsche 911 does not make it any easier. My model does not have a thermotime switch, air pump and a unique WUR that cannot be adjusted.
According to the CIS Trouble Shooting Guide for a symptom of: Irregular Idle With Warm Engine,
I have to investigate a leaking cold start valve, air leak, sensor plate movement, injector leakage, warm pressure control and maybe the plunger on the fuel distributor getting stuck.
Much to look at and explore.
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