Thunderbolt IV timing

[Chaka]

I have a 1995 4.3L V-6 with the Thunderbolt IV ignition. My ignition module is on the distributor, _not_ on the exhaust riser. Do I ground a wire and set this thing to TDC in base timing mode, or do I just time it to 8 degrees BTDC at idle and then check it for advance at higher RPM's? I get conflicting answers when I search on this topic.

Thank you for your help!

 

[Bt Doctur]

Re: Thunderbolt IV timing

TB IV is point and shoot

 

[Don S]

Re: Thunderbolt IV timing

You have Thunderbolt IV, nothing special to set timing, the Thunderbolt V is what had to be put into base timing mode before setting the timing.

 

[Chaka]

Re: Thunderbolt IV timing

Thanks! I was 60% sure that was the case. Now if I ever get the dang thing aligned, I can time it!