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Re: [GMCnet] A couple 'issues' I'd like some advice on. [message #270923 is a reply to message #270901] Sun, 01 February 2015 01:28 Go to previous messageGo to previous message
ljdavick is currently offline  ljdavick   United States
Messages: 3548
Registered: March 2007
Location: Fremont, CA
Karma:
Senior Member
My first thought regarding the “cough” was ignition. Did the 403 have the ridiculously large plug gap spec’s that the 455 has? I’d look at the cap for any carbon traces. Check the coil connections or maybe a burned spark plug wire. Maybe replace the module just for kicks.

But then I’m as shady a shade tree mechanic as there is!

Larry Davick
A Mystery Machine
1976(ish) Palm Beach
Fremont, CA

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Larry Davick
A Mystery Machine
1976(ish) Palm Beach
Fremont, Ca
Howell EFI + EBL + Electronic Dizzy
 
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