distributor problem

[hardon]

i have searched for hours and i am about to lose my shit,
how do you "lock out" a bigport bluetop distributor?


please help

[Matt]

There are yellow round plugs with black caps on them. Place a fuse into the spade connectors and the check engine light should start to flash.

[hardon]

i am running an msd ignition system as it is a carb setup

[Hen may possibly be a nut]

What are you trying to do?

If you are setting up the ignition according to some oldschool manual it may be referring to removing vacuum and mechanical advance. 4AGE dizzies have neither of these. In which case you don't need to do anything to Lock it out.

[hardon]

i have msd 6al2 programmable, i am trying to set my ignition curve but there seems to be and advance happening without setting anything on the msd.
so i have zero retard curve but it still advances as the rpm rises. i was assuming it was the dizzy as all the write ups refer to "locking out" the dizzy.
as far as im aware the msd should not advance my timing without a curve being set.

[Hen may possibly be a nut]

It's been a while since I had one apart, but I'm pretty certain the 4AGE rotors are solidly attached to the shaft. And the pickups are fixed too. Open it up and have a look though, it'll be pretty clear what's what.

And that advance is still mysterious.

[hardon]

i read this somewhere and have asked the msd technical support if this could be the cause .....the 4age distributor produces a trigger signal (for engine rpm and crank position sensing) using a magnetic reluctor sensor mounted in the distributor. The output signal from this type of sensor is not square wave and changes amplitude with rpm.

[hardon]

i am still having issues with the ignition timing.
at idle (1000rpm) the marking on my crank pulley is far let of the 0 and i would guess at saying its around 50 degrees advance if i were to refer to the numbers on the plastic.
it seems to run fine but i would really like to get to the bottom of this issue so i dont cause damage.
FYI the engine is a smallport 16v and i am using a bigport distributor for the msd ignition and i am confident the dizzy has been installed correctly.
any help here will be much appreciated.

a little video showing the crank pulley markings

[hardon]

it has to be the distributor?

[Slimer86]

If ignition is locked on msd to 10 degrees, you should have 10 at the crank. Soubds like it is out 1 tooth.
If you adjust/rotate the distributor does it move closer to 0? If so, then remove distributor and adjust by one tooth in that direction.
FYI, I just had a similar issue, timing adjustment was full retard, and ecu timing crank index position adjusted to compensate for the error, but I don't think that the msd may allow this?