1998 S-10 Fuel pump won't run

BOONESCHIS

MEMBER
1998 ALL OTHER MAKES ALL OTHER MODELS

Hi I have a 1998 4.3 v6 S-10 152000 miles 2wd and have replaced the fuel pump and the filter and the fuel pump relay also re placed the oil pressure switch and still don't get the pump to come on the repair manuel states (inertia switch)? Also have checked all ecm b and #1 ecm fuses to no avail we are lost in this one help!

Friday, May 4th, 2007 AT 11:50 AM

3 Replies

2CARPRO JACK

MECHANIC
11,533 POSTS

Do you have power and ground at the relay? If so then you need to check for "trigger" to turn the relay on. If it turns on then do a continuity check on the wire from relay to tank connector

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Friday, May 4th, 2007 AT 3:16 PM

BOONESCHIS

MEMBER
2 POSTS

Cant tell if I got power at the relay I don't think so my volt ohm prongs are to big to get into the prong holes anything else you can use to check this? Also where's the trigger?

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Friday, May 4th, 2007 AT 9:20 PM

2CARPRO JACK

MECHANIC
11,533 POSTS

You can use a piece of wire pushed into the hole to test it. Not like we are dealing in millivolts here. Trigger is what turns the relay on. Turn ign off for 10 seconds, turn to on position, one of the terminals should light up for 2 seconds then go out, that is the trigger. Then 12 volts to one of them, ground at another and finally power out to the pump. Orange is power, black is ground, there are 2 grays 1 goes to the pump and th e other goes to the oil pressure switch/sender, dark green/white is the power trigger for the relay which comes from the VCM (vehicle control module)

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Saturday, May 5th, 2007 AT 8:03 AM