can any one help me????
my micritech reads 10BTDC but when i use the timing gun it reads close to 30BTDC, and its making the exhuast manifold go red from being so retarded.this is at idle
please help

 

is your timing gun for two strokes? it should be.

 

yeah i believe the timing guy is a normal one that works for must cars., is that the right one

 

The marks on the front pulley are not TDC , You must find Tdc and mark it your self and measure out the degrees .To find TDC on each rotor you need to remove the spark plugs and go through the drill ,not that hard . Do you know how ? A search may find the directions ,or I can tell you,

 

BTDC is not retarded, but advanced, DOH!

Mazda's manual for checking the timing is on #1 trailing plug. The notch in the pulley should lined up with the front cover alignment pointer.


What if anything has been changed to cause you to be concerned over this and to be checking?

 

More likely that you are running very rich at idle causing the red manifold. What is your AFR at idle?

 

i checked it cause my exhaust manifold seemed to be glowing red after about 2 mins of idle. and that was from cold.
i used the front leading plug to check the timiming as i had been instructed..
i lined it up with the notch in the pullt that has the little white dot on it.
i might have to check the afr ???

 

Do you think the white dot is TDC ?

 

i assumed so but i could be wrong

 

I have read approximately the same on my 93. 30 deg advanced @ idle. The Mazda shop manual states the pin lined up with the dot is TDC. Mine takes off from the line like it is way too advanced. It barely moves for 50 feet or so and then hauls ***. I haven't looked into it too deep but if you look at the ECU diagrams, both leading plugs fire at the same time every time. If you put an inductive pickup tach on either leading plug wire, your RPM shows double what it truly is. (happened to me at emmisions). They had to clip on a trailing wire to get an accurate reading. Maybe a different timing light is required? Have other members tried to check theirs with an inductive timing light with advance? (I always used it on my 85 13b and it works perfect!)

 

Once again, you attach the timing light trigger to the #1(front) rotor TRAILING plug as per page G-17 of the manual.

DAPDAS!

 

Your notch is 20ATDC. What you need to do is take the wheel off and measure 25mm to the right of the notch and make a dot with white paint or something. This will be TDC and it should be close to the next spoke on the wheel. Now set your static to 7....lock the timing...hook up to leading #1 ( not leading #2 since this isn't a wasted spark setup )....and check the timing. It should be close to the white dot that you made.

 

At idle speed the notch is 5 deg after TDC if your timing light is connected to the leading plug and it is 20 deg AFTER TDC if your light is connected to the trailing plug . If you need to find TDC Pm me for my telephone number or search .

 

ok just to make sure, is the left of TDC retarded or advances? im getting confused now

 

OWHAT is getting conflicting answers here. Can someone else that has an advance timing light clip on to the leading plug, turn the "advance " **** until the notch and white dot line up? Then do the same when clipped on trailing? What kind of #s do you get?

 

thanks