I got in and turned the key to on and the fuel gauge went up. So I took my screwdriver and lightly tapped a small black box that is located behind the Relay box (Is that the PCM?) I figure that it is the PCM or the connections to it. I plugged in my code reader and waited and then the odometer read "no bus" again. I turned key off then on again and odometer was normal but fuel gauge did not read anything. I opened the hood and messed with relays and nothing happened. I notice where the odometer readout is, the words "no bus". Put in a new fuel pump and it pump for a few secs and quit. Recorded during my Engine Performance class at Rosedale Technical College. This time it provided me with another clue. Fuel pump relay location and wiring diagrams please CAT DOC MEMBER 2003 CHEVROLET S-10 I have a s10 that the fuel pump wont pump. This is a free ScannerDanner Premium video. I tried cleaning connectors, swapped relays. If the fuel pump is bad will you still have fuel reading on the dashboard gauge? Or is that controlled by a different mechanism? Is there something under the dash or in the steering column that if it were to short would cause the symptoms I have described? That was yesterday and it has not happened since.Īfter reading your message, I am wondering if it is electrical. I turned Ignition to on and the gauge worked and then the truck would start. After messing with relays etc (about five minutes). When I turned the ignition to on the fuel gauge would rise eighth of an inch but then drop back down. If the relay is bad would it cause the fuel gauge to not respond?Ĭhecked the relays, and under the box I do not see any corrosion or anything that is loose.Ģ) would not start but starter would crank.ģ) Gauges, fuel gauge would not register fuel but power was going to the gauges. Is there something other than a relay that can cause this kind of symptom. You'll be able to find out if the fuel pump relay, or the fuel pump inertia switch, or the fuel pump is the cause of the no-start condition on your Ford car or pickup. With the help of this 'How To' tutorial, I'll show you how to do it using only a multimeter. I got back in the car and when I turned the key to the "on" position all my gauges were working (coincidence? ). 2 3 4 Testing the Ford fuel pump relay on the car is not hard to do. I opened the hood and found the relay box and just gently tapped on the top of the relays etc. This made me think it was some sort of electrical or relay problem. When I would turn the key to the "on" position all the gauges (gas gauge/oil gauge/battery gauge) would move a little but go back to the flat position. No problems for a couple of days and then all of the sudden it did it again. I thought fuel problem (3/4 of tank of gas) so I got some STP gas treatment at the station. It lost power (like not getting fuel) slowed down and then it came back and I continued on to the gas station. I turned key off then on again and it started.Ī few blocks down the road it did it again very quickly though. Driving along at fifty five mph and all the sudden a loss of power. I recently have had random shutdowns while driving my truck. V8 two wheel drive automatic 167000 miles.
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