S-10 & Blazer 1982-2005
The S-10 and Blazer was arguably the most versatile and accessorizable mid-size truck and SUV on the market.
Platform: S/T-series & GMT 330

2000 s10 4.3 zr2

Old Jan 14, 2020 | 7:55 PM
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Default 2000 s10 4.3 zr2

I'm having a problem maybe someone can help? First off my truck will not fire I try to turn the key and it tries to fire but doesn't I have spark, fuel idk what else to try I'm lost .
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Old Jan 14, 2020 | 8:09 PM
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what troubleshooting have you done?
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Old Jan 14, 2020 | 8:31 PM
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Originally Posted by mountainmanjoe
what troubleshooting have you done?
not much I do know it's not alternator, starter, battery, I dont think its cap and rotor button due to the fact I just replaced them like 1yr ago or so but I have took the plug off the top of the ignition Coil and tried to start it and seen that it did have spark .
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Old Jan 14, 2020 | 8:32 PM
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Originally Posted by Benjamin Bryant
not much I do know it's not alternator, starter, battery, I dont think its cap and rotor button due to the fact I just replaced them like 1yr ago or so but I have took the plug off the top of the ignition Coil and tried to start it and seen that it did have spark .
when trying to crank the truck I do smell raw fuel fumes.
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Old Jan 14, 2020 | 9:07 PM
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ok you may want to test the plugs then
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Old Jan 14, 2020 | 9:26 PM
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Originally Posted by mountainmanjoe
ok you may want to test the plugs then
What's the best way to test the plugs?
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Old Jan 14, 2020 | 9:53 PM
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pull out a plug. hold the tip close to the engine block (distance similar to the spark gap but keep your hands clear). Have someone crank it. Repeat for all cylinders.
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Old Jan 15, 2020 | 2:47 AM
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A little tip I have about testing a plug for fire is use a set of battery jumper cables attach one end to a good ground even the battery and the other end to the metal part of the plug. You can even move it so you can see the plug from the drivers seat.

Next if you have spark check for fuel. Use starting fluid to try to get the engine to start up.

Do you hear the pump prime when you first turn the key "on"?
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Old Jan 15, 2020 | 9:00 AM
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Originally Posted by Irish_alley
A little tip I have about testing a plug for fire is use a set of battery jumper cables attach one end to a good ground even the battery and the other end to the metal part of the plug. You can even move it so you can see the plug from the drivers seat.

Next if you have spark check for fuel. Use starting fluid to try to get the engine to start up.

Do you hear the pump prime when you first turn the key "on"?
yes I do hear the fuel pump turn on
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Old Jan 17, 2020 | 1:33 PM
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when you say "tries to start", this tells me that at least some of the plugs are firing, and u do have fuel getting to at least some of the cylinders...my bet is loose or defective plug and/or wires...do what the man says and check all six plugs for spark...I take it you've seen no codes come up (or ck. engine light on?) if ya plug in an OBDII tool?(if ya aint got one, get one-they're cheap enough and are very handy..and work on many makes of vehicles)..usually, a misfiring will throw a P300-P306 code..If you can be absolutely sure all six plugs are firing, AND firing regularly, then the issue usually lies w/ fuel and/or timing...good luck

Last edited by hogbiker; Jan 17, 2020 at 1:36 PM.
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