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Crank no start

Tiny
409SANTANA
  • MEMBER
  • 2004 BUICK CENTURY
  • 3.1L
  • V6
  • 2WD
  • AUTOMATIC
  • 180,000 MILES
Only wants to start when reset computer (disconnecting the battery for 5 minutes and reconnect) on some times when is cold first thing in the morning. ETC had a po336 code crank sensors been replace (it's has 2).
Friday, August 2nd, 2019 AT 11:11 AM

3 Replies

Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 48,363 POSTS
I have seen the ignition module or the ECM both do this. Lets start with the ignition module first. Here is the location and how to change it out in the diagrams below. Please let us know what you find. We are interested to see what it is.
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Saturday, August 3rd, 2019 AT 12:14 PM
Tiny
409SANTANA
  • MEMBER
  • 14 POSTS
Hey Ken, thank you for the idea. I replace the ignition module and the ECM (from a running car) with no luck. Do you have any other suggestions? Thanks again for the help.
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Tuesday, August 13th, 2019 AT 11:36 AM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 48,363 POSTS
Lets do the PCM next. Here is the location and how to replace it. You can get a rebuilt unit online just give your VIN number and they can program it for you. Here are the replacement instructions in the diagrams below. Please let us know what happens.
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Wednesday, August 14th, 2019 AT 10:38 AM

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