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74' 620 Stopped Suddenly While Driving


natesmith8

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Hey Everyone, 

 

I have come here a couple time and you all have been able to solve my problem almost immediately, so, I am here again. 

 

I am a complete novice at engine repair (as a heads up) 

 

I was driving one day out about 40 mph and the truck suddenly lost all power. The alternator is pretty new, replaced about 1.5 years ago. The battery has also been checked and it is good. I had someone tell me that it could either be a spark plug or the fuel pump. 

 

Any other ideas or help on this would be appreciated! If you need pictures, let me know and ill post them on here! 

 

Thanks again everyone!

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Check all the ignition coil wires, had that happen to me and was a loose coil connection.

 

think you forgot to answer this important question.. This also happen to me and all I did was cleaned the terminals / connectors on the coil.

 

to check if you got electricity to the coil is take a test light, ground the clip and then test each post on the coil with the ignition switch in the start position. If no juice to 1 or both post, you have narrowed down your problem. Good luck, 

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Hey Fellas, 

 

Sorry for the late reply, I was out all day yesterday. Like I said before, I am an absolute novice at engine repair or anything of the sort. If you all give me a specific tasks to look at, I can find enough information online to be able to get you a pretty decent answer back. I also can do any test that does require specialized tools if that helps. I just wanted to give you all a heads up, some of the things stated above were a little to broad and foreign for me to have any idea how to look at it. 

 

As of right now, I am headed down to check the fuses. It seems like that is where a few of you believe I should start. BTW, anyone know where the fuse box is? It will make life easier than searching for an hour. haha

 

Sorry for being an idiot about all this, I'm trying hard to learn about it, but its taking time. 

 

Thanks again for all your patience and help!

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Check ur ballast resistor to see if connection is good. About 1 month ago, my car died and would not start. My ballast resistor, somehow got disconnected. Its white color about 2.5 in long, mounted to drivers side firewall also connected to ur coil.

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And get rid of that fram on your next oil change.... that's gonna be everyone s comment when they see the pics....

I've proved to my self they suck.... no one here likes them.... so far bosch and wix I believe are top choice....

And just because you said your novice I'll add this ...

What are you running for oil?

Some modern oil aren't good for these engines... I'm using royal purple personally, some like rotella diesel motor oil... they are high in zinc and phosphate

Better for flat tappet cams....

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