Thread: Fuel Pressure ?????

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One simple test would be to temporarily hook a full peice of rubber line from pump to carb. Doesn't have to be pretty for now, it's only temporary. This will answer the question of existing lines under the hood or any other hard lines running down the frame. Have you had a chance to run a volt meter at the pump connections while this thing acts up?

I think you're gonna have to drop the tank. There must be a chunk of crud floating around in there, or the sock filter is plugging.

Originally Posted by R Pope

I think you're gonna have to drop the tank. There must be a chunk of crud floating around in there, or the sock filter is plugging.

I thought about waiting till it acts up then using a 5 gallon canister to draw out of instead of the tank, but haven't tried it yet. I'll ckeck the voltage, but I already did the temp hose thing.

One time I had a guy come in that had a problem where the car would die unexpectantly. After it died, the thing would restart and run OK until some random time when it died. It would idle forever. Turns out he had a shop rag in the tank that wandered around and eventually covered the sock. When the pump stopped, the rag wandered away and the car restarted....I dont think that yours is that problem since it appears to be predictable.

Do you still have a regulator in the return line? What is it...is it specifically made for this application in the return line? Something is fishy here...something that appears to heat up and affect the performance of a component....regulators can heat up, pumps can heat up, fuel lines can heat up.....by the way, has the tank internal lines been changed....as in the return line modified or is it GM stock?

mike in tucson

Originally Posted by robot

One time I had a guy come in that had a problem where the car would die unexpectantly. After it died, the thing would restart and run OK until some random time when it died. It would idle forever. Turns out he had a shop rag in the tank that wandered around and eventually covered the sock. When the pump stopped, the rag wandered away and the car restarted....I dont think that yours is that problem since it appears to be predictable.

Do you still have a regulator in the return line? What is it...is it specifically made for this application in the return line? Something is fishy here...something that appears to heat up and affect the performance of a component....regulators can heat up, pumps can heat up, fuel lines can heat up.....by the way, has the tank internal lines been changed....as in the return line modified or is it GM stock?

mike in tucson

I've tried it with and without the return line. Matter of fact I put the return line in after having these problems hoping for a fix. When I plumbed in the mechanical pump a few days ago I 86'ed the regulator and return line all together. It originally did not have a return. I had the tank custom made when I started this project by a reputable tank maker, but who knows, something may be in there. Something is definitely fishy. I've talked to the tech guys at HOLLEY, who usually do a real good job, and it's got them miffed too.