Thread: Sudden problem, truck dies at idle and some black smoke from the exhaust

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I had a similar issue and chased it for a month. Finally after talking with the guys on CHR started with the tank and started pulling things and checking them out. Got to the fuel filter (12 months old) and found that it rattled. It had come apart internally and dumped all the trash down the carb ,a Holley, and cloged the idle circuit. Rebuilt it and all was fine. Also make sure you have a good fuel pressure regulator and gage. Its very easy to mess the floats up with high pressure from the fuel pump. Your truck is awesome and I know it is frustrating having it sit there not being able to drive it. Been there done that!

If the car has an electric fuel pump.. pull the power supply and try running it again. See if it reacts favorably. More like it's old self?? It won't run long but, it'll be a great indicator if the carb is flooding over.

If it's a mechanical fuel pump, you can pinch off the supply hose to the pump and run it. If the results are favorable, then OJH is probably correct.

As an aside, after running the engine out of fuel, the float will be settled to the bottom of the bowl and the needle valve will be at it's most open. When you restore the fuel flow you may have the potential of flushing clear any debris. I have had limited success doing this. Of course the piece of debris if it does move off is now in the bottom of the bowl but it may never cause you any issue...

Lol thats very true! I love the thing I just wanna drive it. Its sounding an awful lot like the carb, I'm gonna take it off today I guess. Fortunately I know a few guys that are Nsra members around here and know how to deal with them. I'm gonna go get a lesson. Hopefully that's all.

When I did manage to get it running yesterday I tried adjusting the floats and it didn't do a thing so. Before i messed with anything though it ran almost normal for a split second though then went back to its old self. I thank all of you for your responses it's a great thig!

Originally Posted by 34_40

If the car has an electric fuel pump.. pull the power supply and try running it again. See if it reacts favorably. More like it's old self?? It won't run long but, it'll be a great indicator if the carb is flooding over.

If it's a mechanical fuel pump, you can pinch off the supply hose to the pump and run it. If the results are favorable, then OJH is probably correct.

As an aside, after running the engine out of fuel, the float will be settled to the bottom of the bowl and the needle valve will be at it's most open. When you restore the fuel flow you may have the potential of flushing clear any debris. I have had limited success doing this. Of course the piece of debris if it does move off is now in the bottom of the bowl but it may never cause you any issue...

I'm gonna try this thanks! It is an electric external pump and I have a cut off switch inside the truck so I'll give it a shot

I'm gonna take a video here later to show yaw style whats going on. I should have done that off the bat. Check back later for updates