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base timing a 4.3l


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msj113
New User

Feb 9, 2010, 9:25 PM

Post #1 of 3 (2711 views)
base timing a 4.3l Sign In

hi all

i seek your 2 cents worth. my 2 cents worth is getting me more lost...

'90 4.3l in a '89 k1500. it was overheated, brought to meto do the heads. they machined flat and went together, i unpluged the tan/bk wire to set the base timing and the durm thing will start @0 degrees run a few seconds then jump 12 degrees.....in the timing light, start dropping rpm then die, yes the tan/bk is still unplugged. any one is welcome to jump in here, i am doin some serious head scratchin'


Tom Greenleaf
Ultimate Carjunky / Moderator
Tom Greenleaf profile image

Feb 10, 2010, 9:15 AM

Post #2 of 3 (2703 views)
Re: base timing a 4.3l Sign In

Not certain but this engine may not use #1 cylinder for base timing. Someone here will know for sure,

T



kas197800
Novice

Feb 10, 2010, 11:52 AM

Post #3 of 3 (2697 views)
Re: base timing a 4.3l Sign In

 the ignition moduel may be the colpret






 
 
 






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