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Intermittent no start then no start condition...continued. 700 1988

uid 18083's pic
posted by  lucid on  Wed Jul 20 14:29 CST 2005
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last visit: Fri Oct 24 12:31 CST 2014
[RELATED]

Another thing that's been noted here at least once is a failure in the "timing pulse" from the EZK CU to the LH ECU. This also renders the ECU useless -- no ground for the fuel relay, and no injector control either. So even with the pumps jumpered, no fuel gets squirted.

Maybe you can find this line on the Russian diagram. It should come into the LH ECU on pin 1. I haven't a clue about the '88 EZK, but later ones send the timing pulse out from pin 17 (yellow/gray wire in the '93 diagram).

With spark and fuel to the rail (with pumps forced), I think injector failure is most likely. Either no injector voltage (Suppression relay), or no ground pulses (ECU bad, lack of power to ECU, lack of timing pulses to ECU, other???)

I think something is crippling the ECU -- thus no FI relay and no injectors if pumps are forced.
--
Bruce Young
'93 940-NA (current) — 240s (one V8) — 140s — 122s — since '63.






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