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Starts then dies every time

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Old Jul 2, 2011 | 01:48 PM
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Default Starts then dies every time

I have a 1985 corvette that was running fine until one day it wouldnt start and I figured out that it was bad spark plugs. So I replaced the plugs and the wires and now it will start but then die within two seconds. Ive tried everything I can think of. I checked my TPS voltage, the MAF, the fuel pressure. Any help would be appreciated.
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Old Jul 2, 2011 | 02:00 PM
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Originally Posted by Camocorvette79
I have a 1985 corvette that was running fine until one day it wouldnt start and I figured out that it was bad spark plugs. So I replaced the plugs and the wires and now it will start but then die within two seconds. Ive tried everything I can think of. I checked my TPS voltage, the MAF, the fuel pressure. Any help would be appreciated.
Vacuum Leak???
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Old Jul 2, 2011 | 03:01 PM
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Have the same problem, found if I push on the connection plug of the VAT Module it starts thought I had it fixed but problem came back, I hope the connection of the wire that sends the 5 volt signal to the ecm to pulse injectors is not making contact on mine, hopfully not a circuit board problem, I'm not that good at soldering.
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Old Jul 3, 2011 | 12:35 PM
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Ok so I checked the pulse to the injectors and I'm not getting any pulse.
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Old Jul 3, 2011 | 02:18 PM
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when you changed the plug wires did you accidently unplug wires from the ignition control module it sends signal to ecm to tell it when to fire the injectors
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Old Jul 3, 2011 | 03:46 PM
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I checked the ignition control mudule and it looks like everything is plugged in. Is there any way to test if that signal is being sent?
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Old Jul 3, 2011 | 04:21 PM
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you can remove the module and take it to a parts store and have it tested, also did you check connections comming out side of distributer by firewall.
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Old Jul 4, 2011 | 09:37 AM
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Originally Posted by Camocorvette79
Ok so I checked the pulse to the injectors and I'm not getting any pulse.
How did you test for pulse ?

Is the 4 pin connector at base of dizzy, clean and tight ?
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Old Jul 6, 2011 | 12:32 AM
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To test for pulse I plugged a test light into the end of the injector harness and when cranking it didn't blink at all. And I believe it is but I'm going to double check to make sure that I have good connections everywhere.
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Old Jul 6, 2011 | 08:03 AM
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A noid light is usually used to check for pulse. I don't think a regular test light can be conclusive, although I have never tried since I have an Actron fuel injector and harness tester.
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Old Jul 6, 2011 | 08:57 AM
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You must install a noid light (borrow one from Autozone) to check the injector pulse.
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