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04-27-2009, 07:34 AM
| | Addict | | Join Date: May 2000 Location: Loretto (Marion Co.)Kentucky
Posts: 337
| |  No Power to Fuel Pump '90 p-up
Have tested main relay and circuit opening relay and both are good. ECU-IG fuse is intact. Large fuses in engine bay are intact as well as relay located there. Any ideas??
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04-27-2009, 09:37 AM
|  | Journeyman | | Join Date: Dec 2007 Location: Battle Ground Washington
Posts: 115
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04-28-2009, 06:23 AM
| | Stranger | | Join Date: Apr 2009 Location: Saint francis
Posts: 1
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Sit back relax pop the top on an ice cold budweiser and it will come to you
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05-04-2009, 09:21 PM
| | Addict | | Join Date: May 2000 Location: Loretto (Marion Co.)Kentucky
Posts: 337
| |
I've tried the fuel pump test connector, no luck. All I get is 0.7V. What could it be? I'm not new to toys, but this is new to me. Fixed an 88 last year that was new to me too, harness had corroded into feeding injectors 1&3 from the resistor box. The injectors in that truck were low ohm, but denso (red & somewhat oval)connector instead of the Bosch type connector(white,square). All the denso type that I had encountered prior to that truck had been high ohm.
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05-05-2009, 01:45 AM
|  | Keyboard Implanted | | Join Date: Nov 2001 Location: SF Bay Area, California, USA
Posts: 4,162
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Well, break out the volt meter and track back from where you see 0.7 volts until you get the full battery voltage and then narrow things down until you find the cause: Toyota 4Runner and Pickup: Cheap Tricks  |
05-10-2009, 04:44 PM
| | Addict | | Join Date: May 2000 Location: Loretto (Marion Co.)Kentucky
Posts: 337
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I am only getting 0.2V today
Constant 0.2 V:
0.2V at terminal *#4-ground of main relay in fusebox under hood
IGN on 0.2V:
0.2V at *fuel pump conn. by (front) rear spring hanger .
0.2V *e1-b at Circuit Opening Relay
0.2V *e1-Fp at Circuit opening relay
Continuity from ground at *e1, *fc(AFM location,with door open, at circuit opening relay location of *fc.
No voltage Even with IGN on:
E1-sta But showing 4.5 ohms
Fc-E1 showing infinity
What should the voltage be coming through the fuses on the switched circuit? Where is it fed from. Does the notes left here point toward something particular that is familiar?
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Alright! Who put the "S" in lisp?
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09-25-2009, 04:08 AM
| | Novice | | Join Date: Jul 2009 Location: new york
Posts: 34
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Quote:
Originally Posted by man2mal  Have tested main relay and circuit opening relay and both are good. ECU-IG fuse is intact. Large fuses in engine bay are intact as well as relay located there. Any ideas?? | have you tried checking on the main fuel pump? there could be leaks if the cases stated above didn't occur. Other causes could be the PCM has decided not to turn on the pump, there's a fault in the circuit between the PCM and the pump,and the pump really is shot and nothing's going to make it run. If the third is the reason, you need to replace it already. I've researched fuel pump prices already. There.Hope I was able to help you.
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