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Old 05-04-2008, 07:36 PM   #1 (permalink)
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Default injectors not pulsing 95 3.9 auto

does anyone know what would cause the injectors not to fire?what triggers the injectors to pulse? I have tried another ecu and still no injector pulse. the 95 has a distributor, no cam sensor, no crank sensor. is there a relay for the injectors? does the ecu get a signal from the ignition system like the old bocsh systems did with the tach input. i am baffled
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Old 05-05-2008, 07:05 AM   #2 (permalink)
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The computer needs to see at least 50 rpm on the tach signal(off the coil) before it turns on the injectors.
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Old 02-29-2012, 11:35 AM   #3 (permalink)
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Default no pulse

I have the same problem on mine . How does the computer get that signal.
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Old 02-29-2012, 12:11 PM   #4 (permalink)
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Originally Posted by hornet View Post
I have the same problem on mine . How does the computer get that signal.
One of the wires on the coil.
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Old 03-02-2012, 10:28 AM   #5 (permalink)
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Default No pulse

Yes i found it white wire black strip. Thank you.
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Old 03-02-2012, 04:12 PM   #6 (permalink)
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Originally Posted by PTSchram View Post
One of the wires on the coil.
I think it's the white wire with bk stipe, off of the (-) terminal on the coil.
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