929 Timing and Timing Belt

89 929 3.0L SOHC

I replaced the timing belt on the car. Since it had jumped, I wasn't too
sure of the timing marks. I do have the shop manual for the car, the small
form factor official Mazda book. The pictures for the timing mark on the
crank were vague. I ended up using the gear tooth that lines up with the
locator pin on the crank. This locator pin is the one the baffle plate, fan
belt drive pulley and the harmonic balancer use to line up. I lined up the
tooth with the mark on the block. The cam shafts I lined up per the manual,
hard to see, but I think I got it right. Did I???

The engine runs well now and started right up after having sat for the
winter. After fully warming up I attemped to adjust the spark timing, ooops,
as I am typing this, I just remembered, I forgot to short out the green
connector to set the timing. I was having trouble setting the spark timing,
had to turn the distributor all the way counter-clockwise to get the marks
to line up. Now, my original question was could the timing be off due to the
old valve timing belt having skipped, BUT, my new question is will
forgetting to connect the green connector throw off the spark timing check
by a few degrees? Guess I'll have to redo this tomorrow.

Thanks for any advice.

john smith wrote:


> forgetting to connect the green connector throw off the spark timing check
> by a few degrees? Guess I'll have to redo this tomorrow.
>
> Thanks for any advice.
>


I did the timing on one of those once, and I did it by ear -- listened
for pinging. Though it's hard to hear on this engine.

I'm guessing a little, but I suggest you re-do the timing per the procedure.
Adding the jumper probably disables the servo that compares the crank angle
sensor with something else (#1 spark plug?) and adjusts the delay to put the
timing wherever it is supposed to be at that moment. What you probably did
was adjust it out of it's dynamic range, which will likely result in the
thing running poorly. Either that or you got the timing marks aligned
improperly. If following the correct procedure gets it back in line, then
you are done.

Ken

"john smith" <(E-Mail Removed)> wrote in message
newsjkgc.2785$2e6.2702@lakeread01...
> 89 929 3.0L SOHC
>
> I replaced the timing belt on the car. Since it had jumped, I wasn't too
> sure of the timing marks. I do have the shop manual for the car, the small
> form factor official Mazda book. The pictures for the timing mark on the
> crank were vague. I ended up using the gear tooth that lines up with the
> locator pin on the crank. This locator pin is the one the baffle plate,
fan
> belt drive pulley and the harmonic balancer use to line up. I lined up the
> tooth with the mark on the block. The cam shafts I lined up per the
manual,
> hard to see, but I think I got it right. Did I???
>
> The engine runs well now and started right up after having sat for the
> winter. After fully warming up I attemped to adjust the spark timing,
ooops,
> as I am typing this, I just remembered, I forgot to short out the green
> connector to set the timing. I was having trouble setting the spark
timing,
> had to turn the distributor all the way counter-clockwise to get the marks
> to line up. Now, my original question was could the timing be off due to
the
> old valve timing belt having skipped, BUT, my new question is will
> forgetting to connect the green connector throw off the spark timing check
> by a few degrees? Guess I'll have to redo this tomorrow.
>
> Thanks for any advice.
>
>