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1989 Pontiac Firebird ECM

Tiny
JUSTAHDMAN
  • MEMBER
  • 1989 PONTIAC FIREBIRD
  • V8
  • 2WD
  • MANUAL
  • 89,000 MILES
Yes could someone help was driving and car started bucking wanted to stall was ok when taking off but wanted to stall when came to stop idle is up and down checked code and is 42 replaced cap, rotor, plugs, module still not running right, any ideas
Saturday, June 12th, 2010 AT 11:55 AM

1 Reply

Tiny
DOCFIXIT
  • MECHANIC
  • 18,828 POSTS
May not be ECM but ignition module inside DIST see diagram


https://www.2carpros.com/forum/automotive_pictures/198357_Graphic_477.jpg


if open or short in 423 will set 42 code. Much cheaper than ECM to replace.
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Saturday, June 12th, 2010 AT 12:48 PM

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