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where is fuel pump relay 87 245? 200 1987

uid 18083's pic
posted by  lucid on  Mon Sep 5 10:54 CST 2005
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last visit: Fri Oct 24 12:31 CST 2014
[RELATED]

Hi John, So the 25 amp fuse was blown? Don't hear of that very often. It carries the current for everything in the FI system. Pumps are the biggest draw - maybe 12-14 amps. But the only thing I've known to blow that fuse is the O2 sensor heater -- where the wire insulation got burnt or worn off, making a dead short to ground. Can't quite see that on an '87, with the sensor in the manifold, but...

Are you sure you have spark at all plugs? An ignition primary failure will trump the FI system. No spark-no fuel.

The fuse 6 to 4 jumper Bob refers to will bypass much of the FI front end, 25 amp fuse and Fuel relay basically. A Jumper between the LEFT (input) fuse contacts will apply voltage just like the Fuel relay does. The pumps will run immediately, so try starting.

If the ignition is OK, it should start -- meaning the fuse jumper bypassed a failing point in the fuel system. Let us know what happens and we'll go from there.
--
Bruce Young
'93 940-NA (current), 240s (one V8), 140s, 122s, since '63.






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