back again with this headache of a truck, but I guess it isn't as bad as it could be for sitting 21 years. The problem i'm having now is we got the truck running, and running flawless, motor sounds perfect, purrs like it should, nice deep tone to it, Not losing oil. But the problem is we took it for a test ride, and it turns out the radiator was corroded pretty bad.. The cooling system prior to driving was flushed out with blue devil and re-filled with distilled water for testing. Well, upon taking it for a ride, The radiator blew on it. So immediately upon that happening, (which wasn't very long due to my behind directly behind my buddy and noticed water pouring immediately) the truck was shut right down, and we towed it home. Well went out to start it up after dealing with the radiator, and it starts right up and runs like a top. After about a minute it cuts out and drops off like the key was turned off. Due to that i kind of have to figure its a spark issue? either that or a voltage issue.. Any suggestions?

 

Run it till it quits. Then take the aircleaner off and look down the throat of the carb while you push the throttle wide open(engine off). If you do not see fuel squirting down into the engine you have a fuel problem. If you do see a strong stream of fuel squirt down in the engine you can assume you have a spark problem. You can try changing the TFI module on the dist out if your truck is still all original.

 

Well, I'm kinda stuck until i get some help here, I cant see down in there without a flash light and am sadly unable to hold the choke open, hit the throttle and keep an eye on the fuel flow, but it does sound as if it is pushing fuel, if it were the case that it wasn't getting fuel, wouldn't it not start back up? I could check my fuel filter, But if it keeps sucking in fuel enough so to start it, I dont for see if being much of a fuel issue.. Being it's a mechanical fuel pump and all, can they fail to a point where they wont push through enough fuel to run the motor?

 

I wonder if the electric fuel pump is getting power in START but not in RUN...

 

Since it was running well prior to the radiator incident, I am betting the distributor got wet. Once allowed to cool, the moisture condenses and "falls away" from the terminals and or rotor. As the engine warms, the water becomes vaporized and causing running issues.

Remove the distributor cap and rotor and wipe clean. Some even spray with WD40 [the WD stands for water desiccant]. Reassemble. Also, remove each spark plug wire [1 at a time] and clean and dry each end [apply the dielectric grease].

I hope this will help.

 

It isn't losing spark, and I have already done that, Found it to be a fuel issue, haven't torn into it anymore than that thus far,

Has a mechanical fuel pump, Not electric, Thinking about putting an electric one in line somewhere though.

 

If you do that, go around the mechanical one and bypass it.

 

Planned on it, May put a new mechanical in as well for the simple fact if the electric fails, all youd need to do is swap the lines to get you home.