Rich stop on '86 4 ksq

[rizov_d at shaw.ca]

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Hello,

Could anybody help me to clarify what a"rich stop" on CIS- E (KE Jetronic)
means('86 4ksq)?

What could cause the current when measured at differential pressure regulator
to stay steady at 17,7 mA. This value is described as "rich stop"- 10 mA above
normal readings, but I could not find eventual explanations what causes that
condition.

Any help is highly appreciated.

Dobby