Why won't it start?

Tiny
CHRISTINATE
  • MEMBER
  • 1996 PONTIAC GRAND AM
  • 120,000 MILES
Car has been running well. Parked it and came out the next morning and engine would crank over, but would not start. Have determined that engine is lacking spark and fuel. Upon key on, I hear the fuel pump run, along with everything else powering up ok. All fuses ok, including the pcm and ign fuse. Have replaced the coil pack along with the ignition module and crank sensor, but with no change. Ignition module getting the 12 volts at the 2 pin conn. On left side. Crank sensor ohmed out at 901 and with engine cranking was getting 1.1 volts. All grounds look good. Unplugged map sensor, no change.
Wondering what to look at next?
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Friday, December 30th, 2011 AT 4:18 AM

15 Replies

Tiny
FIXITMR
  • MEMBER
What motor?
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Friday, December 30th, 2011 AT 4:52 AM
Tiny
CHRISTINATE
  • MEMBER
3.1
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Friday, December 30th, 2011 AT 7:17 AM
Tiny
FIXITMR
  • MEMBER
Some testing help here. http://troubleshootmyvehicle.com/gm_ckp_3.1L_3.4L/ckp_sensor_test_1.php

http://easyautodiagnostics.com/ignition_gm/ign_module_test_1.php
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Friday, December 30th, 2011 AT 7:40 AM
Tiny
CHRISTINATE
  • MEMBER
Thanks for your help, but the ignition module and crank sensor has already been replaced prior to your post on testing them. Any other clues?
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Sunday, January 1st, 2012 AT 3:05 AM
Tiny
FIXITMR
  • MEMBER
You checked ignition module ground wire next to hot?
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Sunday, January 1st, 2012 AT 3:45 AM
Tiny
CHRISTINATE
  • MEMBER
Yes, we have a good ground on that side.
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Sunday, January 1st, 2012 AT 4:12 AM
Tiny
FIXITMR
  • MEMBER
Did you test CKP pulse at ignition module?
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Sunday, January 1st, 2012 AT 4:34 AM
Tiny
CHRISTINATE
  • MEMBER
Yes, around 1v cranking the engine and it ohm'd out at 900ohm
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Sunday, January 1st, 2012 AT 4:41 AM
Tiny
FIXITMR
  • MEMBER
And still no spark?
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Sunday, January 1st, 2012 AT 4:55 AM
Tiny
CHRISTINATE
  • MEMBER
Correct, no spark. Everything leads to the module in my mind, but I have tried two different ones.
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Sunday, January 1st, 2012 AT 5:14 AM
Tiny
HOMER1967
  • EXPERT
Are you using the same key you always use?Any theft lights on?
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Sunday, January 1st, 2012 AT 5:25 PM
Tiny
CHRISTINATE
  • MEMBER
Yes, same key. Theft light has always been on
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Sunday, January 1st, 2012 AT 5:43 PM
Tiny
HOMER1967
  • EXPERT
It really sounds like a pass- key or pass lock issue to me. Can you have someone scan it and see what kind of theft system codes you have
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Sunday, January 1st, 2012 AT 9:12 PM
Tiny
CHRISTINATE
  • MEMBER
Checked power, cleaned and rest. Only codes where for the oxygen sensor. Still nothing
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Tuesday, January 3rd, 2012 AT 2:14 AM
Tiny
RIVERMIKERAT
  • EXPERT
Christinate, did you tell them you needed soft/theft system codes pulled?
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Friday, January 27th, 2012 AT 8:00 AM

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