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1999 Pontiac Grand Am starts and stalls no fuel injector pu

Tiny
TAMMY1980
  • MEMBER
  • 1999 PONTIAC GRAND AM
Engine Mechanical problem
1999 Pontiac Grand Am 4 cyl Two Wheel Drive Automatic

hi I have a 99 grandam it will start up for about 2 secs and then die it will stay running if u hold the key in the crank positon but as soon as u let it go it quits there is no injector pulse what could cause this?
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Sunday, April 11th, 2010 AT 8:46 PM

7 Replies

Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
Check and test injector fuse, injector/s and the computer injector driver to include the ignition switch and oil pressure switch.
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Wednesday, July 29th, 2020 AT 10:01 AM
Tiny
TAMMY1980
  • MEMBER
  • 4 POSTS
We have recently replaced the pcm and the crankshaft position sensor and the cam shaft positon sensor and the ignition switch there still is no pulse we have checked all fuses and there is gas going to the injectors just not spraying
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Wednesday, July 29th, 2020 AT 10:01 AM
Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
Use a noid lite on the injector harness-don't flash test the wiring
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Wednesday, July 29th, 2020 AT 10:01 AM
Tiny
TAMMY1980
  • MEMBER
  • 4 POSTS
We put the noid light on the injectors and it doesnt do anything we are thinking now maybe the brain ( PCM) needs to be reprogramed? Because it was taken out and put back in and all sorts of parts where replaced
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Wednesday, July 29th, 2020 AT 10:01 AM
Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
Did you check for power on the injector harness before you hook up the noid lite? If not do so
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Wednesday, July 29th, 2020 AT 10:01 AM
Tiny
TAMMY1980
  • MEMBER
  • 4 POSTS
Yes there is power going to the injectors just not spraying we are thinking maybe the pcm needs to be reprogramed
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Wednesday, July 29th, 2020 AT 10:01 AM
Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
Sounds like the computer ground driver's for the injector/s are defective
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Wednesday, July 29th, 2020 AT 10:01 AM

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