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1997 Silverado crank no start

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Old Aug 27, 2024 | 12:34 AM
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Default 1997 Silverado crank no start

So I was trying to help a buddy out by working on his truck and the battery was dead so I hooked the jumper cables up to my truck and in the process of charging his battery a wire on his truck started smoking I guess a solenoid to the coil by the distributor so I unhook the battery cables real quick with my truck still running so it ran for like 10 minutes and then I went to back out to leave and my truck just shut off in the middle of their driveway and wouldn't start back up. After trying different things with no luck with starting I had about giving up but I said well let me try it one more time just for the hell of it which was a Couple hours later. I hit the key and it started, idled fine for a few minutes then for a second it acted like it wanted to die but cleared up. I started driving and it kept running for a couple miles but it was running rough and it did die a time or two but it crunk right back up but I couldn't give it more than quarter throttle. After a couple miles, it shut off and would not crank back up. Got pulled to a buddies house a mile or two down the road. Over a couple days of working on it little at a time, I put new rotor button, new distributor cap, new mass air flow, new ignition coil, new ignition control module beside the coil, I tried pouring a little gas in breather, fuel pump has pretty strong fuel pressure at Schrader valve. So I got it pulled to my house and replaced crank sensor and put in a new ecu and it started right up and then I turned it off and it started up again. So 15 minutes later I go to start it and let'* just say I've been trying to get it to start all day and it hasn't started since. I tried swapping back to the old coil and ignition control module with no luck. I had touched the battery cables together to do the ECU reset but that didn't solve the issue either. At a total loss as to my next step any guidance would be much appreciated!
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Old Aug 27, 2024 | 05:54 PM
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You need to do some actual testing. Fuel pressure with a gauge top start.
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Old Aug 27, 2024 | 11:55 PM
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Let'* think this through:

Originally Posted by Kraftsharp45
I hooked the jumper cables up to my truck and in the process of charging his battery a wire on his truck started smoking
Charging your buddy'* dead battery with jumper cables then his truck smoked. This doesn't make sense unless his truck was already broken or maybe if the jumper cables were on backwards. If his ignition was off then essentially his battery is just a battery, and whatever smoked would have smoked without your help. Maybe it did, and kept doing that until the battery was dead, then you came along to help. Just a guess there.

Then you replaced:

Originally Posted by Kraftsharp45
new rotor button
new distributor cap
new mass air flow
new ignition coil
new ignition control module beside the coil
replaced crank sensor
new ecu
Were any of these parts diagnosed as bad?

I agree with carfixer007 above ^^^^^^^

What'* the fuel pressure?

Also:

What is the voltage of the battery with the ignition off (measured with a volt meter)?

If it starts, what is the voltage as measured at the battery while it is running (measured with a volt meter)?

Last edited by CathedralCub; Aug 27, 2024 at 11:56 PM. Reason: Added two linefeeds
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Old Aug 28, 2024 | 09:07 PM
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this might be a dumb question, but could the initial jump-start have fried something in the electrical system? I'm not sure how to check for that, but it seems like it all started there.
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Old Aug 28, 2024 | 11:26 PM
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Could be. That'* the reason for some of my questions.

I never jump start anyone. I do use jumper cables to charge their dead battery so that I can disconnect the jumper cables while they start their car. A little favor like surge-loading my electrical system with their starter inrush can lead to a lifetime of electrical issues.
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