1995 SE Bonneville starts then dies - Page 3 - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


1992-1999 Series I L27 (1992-1994 SE,SLE, SSE) & Series II L36 (1995-1999 SE, SSE, SLE) and common problems for the Series I and II L67 (all supercharged models 92-99) Including Olds 88's, Olds LSS's and Buick Lesabres Please use General Chat for non-mechanical issues, and Performance and Brainstorming for improvements.

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Old 01-03-2013, 08:07 AM   #21
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Is your security light coming on and staying on?
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Old 01-03-2013, 08:40 AM   #22
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The security light comes on when you first turn the key on and then goes off and stays off. I have not seen it light up at any time.
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Old 01-03-2013, 09:05 AM   #23
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something is causing the injectors to shut back off. i dont know what else would.
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Old 01-03-2013, 09:13 AM   #24
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I agree, I am going to do the bypass with the resistors first that eminate the ignition switch and key as the reason for no start. If not corected then I will ordered the part to bypass the entire vats system. Will let you know what I find. Thanks
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Old 01-03-2013, 11:50 AM   #25
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Let me look this up in my fsm tonight. I think vats shuts off the starter on 95'*.
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Old 01-03-2013, 12:23 PM   #26
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that diagram i showed had inputs from vats to the pcm, if it just shut down the starter it wouldnt need those
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Old 01-03-2013, 07:45 PM   #27
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Ok, update time. I did the ignition cylinder passkey bypass with resistors and of course i still have the same problem. I really did not think it would help but wanted to try anyway. I did recheck for fuel pressure- 50 psi and still have the injectors flashing when cranking. It still attempts to start for merely a second then dies. I did use my actron scanner and I have the code P0629 - passkey frequency invalid code back again. I erased the code, did a crank, rechecked and the code was back. I am just going to throw this out and see what everyone thinks. I have read that the vats control board sends a frequency signal to the PCM to signal the injectors to fire. ( i think i understood that correctly) Could it be possible that the VAtts controls board is not sending the signal and that is where that code is coming from? Let me know if I am way off the mark. Thanks
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Old 01-03-2013, 07:57 PM   #28
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thats what i was try to get you to test. the 50hz signal should be on one of those pins on the pcm connector
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Old 01-03-2013, 07:59 PM   #29
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lloks like dark blue wire pin d14
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Old 01-03-2013, 08:28 PM   #30
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Quote:
Originally Posted by jwfirebird View Post
thats what i was try to get you to test. the 50hz signal should be on one of those pins on the pcm connector
Yes, you did say that earlier, now I understand what you meant. I will not be able to check for signal on pin d14 until this weekend. I will post what I get. Thanks for the info......
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