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no start - fuel pump woes 200 1984

uid 18083's pic
posted by  lucid on  Fri May 28 06:58 CST 2004
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last visit: Fri Oct 24 12:31 CST 2014
[RELATED]

Since the pumps run with fuses 5& 7 jumpered, see if it will start that way.

If it does start, your fuse jumper is replacing a failing Fuel Relay — or one that is not getting the needed voltage (Fuse 12 or 13) BL/R wire
or needed ground on BL/GN wire from ECU.

If it doesn't start with Fuel Relay bypassed and pumps running, suspect a no spark problem. This will, by default, prevent the Fuel Pump relay from energizing.

If you have a meter or test light, put it on the Fuel Relay ground terminal by "back-probing" the BL/GN wire at the harness plug. You should see voltage (thru the coil) with Key ON, then it should change to a ground condition (from the ECU) while cranking/running.
--
Bruce Young
'93 940-NA (current) — 240s (one V8) — 140s — 122s — since '63.






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