I have a Mazdaspeed slotted timing wheel on my 99 and I am in the process of setting the timing. From what I understand I should be using the mark in the timing wheel that is on the left and align that up with my desired advance (14 degree )
I have the TEN and Gnd jumped, idle as close to 850 as possible (actually 900 is as low as I can get it, idle screw all the way in). All electrics off, engine is warm but no fan running.
Here's my issue: I can get the timing to near 14 (it jumps around a bit +-3 degrees) but here's the part I do not understand - after a few minutes of running the timing reverts to 10 degrees and does not move, no jumping around, period. Upon restart it back to jumping around14 for a few moments then reverts to 10 again. The timing wheel is not moving between attempts.
Any ideas?
My thoughts, motor too hot (computer locking down the timing), should i undo the TEN jumper for timing? Any thoughts?
Thanks for any help.
Bruce