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No injector pulse

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Old 06-19-2011, 07:34 PM
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No injector pulse

Im trying to wire up an 89 tpi ina fiero with a 355 i have spark, and the vats has been supposedly taken off the chip, but the injectors have no pulse and have voltage on both sides. Any ideas?
Old 06-19-2011, 10:18 PM
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Re: No injector pulse

What harness are you using? Did u check your 2 inj fuses?
Old 06-19-2011, 11:21 PM
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Re: No injector pulse

I'm using all stock harness out of an 89 firebird and I don't have fuses but there's power where the fuses should be.
Old 06-20-2011, 08:25 AM
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Re: No injector pulse

Check for a bad pickup coil and/or ignition module either will cause a no pulse condition.

also check the bulkhead connector on the firewall to make sure it does not need to be repinned.
Old 06-21-2011, 06:09 PM
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Re: No injector pulse

I have power to all the terminals in the ecm that i should except the check engine light and i have 5v at the vats
Old 06-21-2011, 06:10 PM
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Re: No injector pulse

And ive grounded the ones that should be grounded
Old 06-21-2011, 10:32 PM
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Re: No injector pulse

If your sure vats was elemenated then might start with ign module it uses the ground side to pulse injectors sence you have pwer trace the ground
Old 06-21-2011, 11:34 PM
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Re: No injector pulse

Would I still have spark if I had a bad ignition module?
Because I have spark.
I have everything i need for it to run, except the injector pulse.
Old 06-21-2011, 11:58 PM
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Re: No injector pulse

Pickup coil would be spark side for plugs so thats probly ok ign module would be pulse side for injectors i would start there check for loose connectors crimped wireing and all the basic fuses/relays ect
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