VitaminC
Registered Member
Okay guys, I'm making this post with the intention of a "fixed" thread title in order to help someone else.
87 Jimmy, TBI 350, 700r4, 208.
Well....... Driving home from work yesterday, 10 minutes into driving, she just shut off. Would crank and crank, but no fire. I thought i was out of gas, i wasnt. Towed it home (after a nice conv. with an officer with the personality of a white crayon).
At home I put a flashlight on it and had my gf crank it. No fuel through the injectors. Threw a known good ignition module in it, no change. Put a noid light on injector wires and got a solid signal from all 4 of them. Had her crank it with the light on the injectors... no pulse. Strange, but I'm a noob and I need to do some more reading.
So I worked my way back through the fuel system, probably wrong but f-it. Pulled the filter, and it still had some pressure in the lines. I was able to blow through it as well. Without a filter I had the gf crank the truck, the trickle of fuel out of the lines (tank side) did not change. I figured if the pump was still good, a bunch of fuel would have rolled out. It's been my thought for months that the fuel tank needs inspected anyway so I went to work on the strap bolts (very stubborn btw).
The tank isn't all the way down, like I said, stubborn. I remember reading that the fuel pump needs a signal (obviously). But I can't remember exactly where the relay gets it. I know that the oil pressure sensor can send it if the relay fails. But what originally does? Distributor's Pick-up coil?
I plan on hot-wiring the relay's pigtail tonight to see if the pump responds that way.
All thoughts and opinions appreciated.
Cody
87 Jimmy, TBI 350, 700r4, 208.
Well....... Driving home from work yesterday, 10 minutes into driving, she just shut off. Would crank and crank, but no fire. I thought i was out of gas, i wasnt. Towed it home (after a nice conv. with an officer with the personality of a white crayon).
At home I put a flashlight on it and had my gf crank it. No fuel through the injectors. Threw a known good ignition module in it, no change. Put a noid light on injector wires and got a solid signal from all 4 of them. Had her crank it with the light on the injectors... no pulse. Strange, but I'm a noob and I need to do some more reading.
So I worked my way back through the fuel system, probably wrong but f-it. Pulled the filter, and it still had some pressure in the lines. I was able to blow through it as well. Without a filter I had the gf crank the truck, the trickle of fuel out of the lines (tank side) did not change. I figured if the pump was still good, a bunch of fuel would have rolled out. It's been my thought for months that the fuel tank needs inspected anyway so I went to work on the strap bolts (very stubborn btw).
The tank isn't all the way down, like I said, stubborn. I remember reading that the fuel pump needs a signal (obviously). But I can't remember exactly where the relay gets it. I know that the oil pressure sensor can send it if the relay fails. But what originally does? Distributor's Pick-up coil?
I plan on hot-wiring the relay's pigtail tonight to see if the pump responds that way.
All thoughts and opinions appreciated.
Cody
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