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No Spark!! 89 blazer s10 tahoe

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Old June 4th, 2009, 4:32 PM
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Default No Spark!! 89 blazer s10 tahoe

Hey guys! Well started up fine till i changed the cap
rotor, plug wires now i am not getting a spark, so i bought a new ignition coil and still no spark to the distributor. I checked the fuse box and all is good, seems like i am not getting gas now eithier. What could possibly go wrong with just changing this stuff? Checked the fuel pump relay fuses and there good to. Cranks over fine, distributor, rotor and wires were pretty funky and it started fine, i just dont get it. Any suggestion would be great, Thanks 4.3

Last edited by Hollerdog; June 6th, 2009 at 10:53 AM.
Old June 4th, 2009, 4:38 PM
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Is your timing set correctly?
Old June 4th, 2009, 4:45 PM
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Is there spark if you pull one out, ground it and look at it while its cranking? If so I agree with the last post, timing is off or the new parts are not installed correctly, wires backwards/mixed up, etc...
Old June 4th, 2009, 4:45 PM
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That was going to be what i did next, but dont have a spark to start it with.
Old June 4th, 2009, 4:47 PM
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Yea i took a good plug and grounded it and there was no spark
Old June 4th, 2009, 4:55 PM
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Double checked the firing order and its right, even if it was wrong i should still get spark. Ran fine before so timing should be ok to.
Old June 4th, 2009, 4:56 PM
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I meant your wiring that powers your coil, do you have a volt meter to check the coil with? just to see if its getting power
Old June 4th, 2009, 5:04 PM
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I havent check that and yes i do have a volt meter, How do i do that, sounds like a good possibility since the coil is new??
Old June 4th, 2009, 5:09 PM
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I havent had to test one in a long time but I would ground one lead on the voltmeter and check for +12v on the lead wire to the coil, not the spark output. There should be 2 poles on the coil to check. Here is a cool animated GIF that shows how it works...

Last edited by Mike Sigmond; June 4th, 2009 at 5:13 PM.
Old June 4th, 2009, 5:10 PM
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You said you replaced distributor right? Or just the cap? If you replaced distributor did you time it?


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