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Won't start

Tiny
JACKTJR
  • MEMBER
  • 2000 GMC JIMMY
  • 181,275 MILES
Replaced fuel pump ran for a few days and shut down. Good spark, good fuel pressure. Will start if fuel is introduced directly
Monday, March 19th, 2012 AT 11:07 PM

6 Replies

Tiny
SATURNTECH9
  • MECHANIC
  • 30,869 POSTS
Is the security light on solid or flashing when trying to start it?
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Monday, March 19th, 2012 AT 11:11 PM
Tiny
JACKTJR
  • MEMBER
  • 3 POSTS
Security light flashing when trying to start
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Tuesday, March 20th, 2012 AT 2:44 PM
Tiny
SATURNTECH9
  • MECHANIC
  • 30,869 POSTS
If the security light is flashing then thats why it wont start the computer disabled the fuel injector pluse. You need to get codes to get a starting point.
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Tuesday, March 20th, 2012 AT 4:16 PM
Tiny
JACKTJR
  • MEMBER
  • 3 POSTS
Codes for what? And howdo I use the codes
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Tuesday, March 20th, 2012 AT 8:21 PM
Tiny
SATURNTECH9
  • MECHANIC
  • 30,869 POSTS
Codes that would be in the computer there trouble codes that tell you there is a problem with a certain circuit part etc. Thats a starting point for diagnoses. You would hook up a scan tool to your vechile that would read codes. You can try a basic scan tool but you might have to use a more advanced one to read body control module codes.
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Wednesday, March 21st, 2012 AT 1:33 AM
Tiny
MJAMES
  • MEMBER
  • 3 POSTS
If it is a problem with a passkey then you should be able to recode the key by putting the key to the on position for 10 minutes then turn the key to off, repeat this for a total of three times (30 minutes) and the car should start if this is the problem. Also did you check to see if the fuel pressure holds constant this will check the pressure regulator. Check the fuel injection with a noid light to see if the injectors are firing also check the crankshaft position sensor.
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Sunday, April 1st, 2012 AT 2:45 AM

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