Timing Advance Question
When I time my engine, at idle up to about 1000 rpm, the timing is set to 6 degrees btdc. I've asked several people but have mixed answers. Most say this is too retarded (in more ways than one) and should be set to about 12 degrees.
When I rev up to above 1,000 rpm and above, the timing jumps to about 12 - 15 degrees btdc. This is what most people agree with.
What's the deal with the timing jumping like that? The emission sticker says that the timing should be set at 6 degrees at 1500 rpm, but this is the rpm range when the timing advances.
BTW, all computer and emission stuff is intact. I also follow the the timing instructions on the emission label (disconnect the distributer vacuum advance line and plug vacuum hose, etc)
Anyone else have this timing advance situation? Is this normal?
Black '83 CJ8
Rustproof plywood floorboards and bed upgrade.
Lots of work, but working on it.