2001 chevy s-10 4.3 Won't start

  • Thread starter Thread starter TrdScionxB2
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The next home it does the no start thing immediately pull a spark plug and connect the wire up to it, ground the spark plug threads to metal area like exhaust manifold and see if there is a good spark or not, that will help narrow it down...should hear the spark snap
 
Mikeybc
The next home it does the no start thing immediately pull a spark plug and connect the wire up to it, ground the spark plug threads to metal area like exhaust manifold and see if there is a good spark or not, that will help narrow it down...should hear the spark snap
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So I can learn, what is the spark plug thing helping me understand what's going on ?
 
TrdScionxB2
So I can learn, what is the spark plug thing helping me understand what's going on ?
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To see if the ignition system is providing a spark to the plug to ignite the feul. You need fuel, compression and spark for a engine to run, the spark needs to be timed properly though...that's controlled by the computer.
 
Mikeybc
To see if the ignition system is providing a spark to the plug to ignite the feul. You need fuel, compression and spark for a engine to run, the spark needs to be timed properly though...that's controlled by the computer.
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Ok, I understand. I do know enough about cars that it needs gas & a spark ;) But knowing how to find a problem & fixing it, I could use more knowledge with that.
 
It can be a real pain, usually a process of elimination, start with the basics and work from there.
 
Mikeybc
The next home it does the no start thing immediately pull a spark plug and connect the wire up to it, ground the spark plug threads to metal area like exhaust manifold and see if there is a good spark or not, that will help narrow it down...should hear the spark snap
Click to expand...
You can do that but it's easier to take a screwdriver and make contact with the end of the plug rather than grounding it to something else. That way you don't have to lean over as much.

You need fuel, air and spark to make an engine run. You need fuel and air coming in, spark to make it fire and the ignition source that provides said spark.
 
Slashfan
You can do that but it's easier to take a screwdriver and make contact with the end of the plug rather than grounding it to something else. That way you don't have to lean over as much.

You need fuel, air and spark to make an engine run. You need fuel and air coming in, spark to make it fire and the ignition source that provides said spark.
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True, what I meant by fuel is the the A/F mixture, since the air is already supplied by our atmospheric pressure (approx 14.5 psi) you then need the fuel and spark but without compression it wont run. An engine with extremely worn or broken rings with very low compression won't run even if everything else is perfect.
 
I would also guess fuel pump. Or bad gas, water in the gas? Fuel pump sounds about right. Fairly common for GM vehicles.
 

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