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Still No Start. How to rule out faulty ECU 200 1989

uid 18083's pic
posted by  lucid on  Fri Mar 12 14:28 CST 2004
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last visit: Fri Oct 24 12:31 CST 2014
[RELATED]

Adding to Dan and Randy's tips—if it runs with jumper from Fuse 6 to Fuse 4 (bypassing the Fuel Injection relay), see if the ECU is failing to ground the Fuel half of the relay during cranking.

Use a voltmeter to Back-Probe the relay connector BL/GN wire (terminal 86/2). This point should be grounded by the ECU when it gets an "OK" from the Ignition CU.
--
Bruce Young
'93 940-NA (current) — 240s (one V8) — 140s — 122s — since '63.






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