4 Pulse + 2 Home Programs

Spitronics has a generic program for 3 different variations of these angle sensors. They are mostly distributor hall type sensors. This firmware is called Combo 48 4+2Home due to the number of different cars using this configuration. This firmware is used for different manufacturers like Mitsubishi, Mazda and Hyundai etc. It is up to the tuner to set it up so that coil and injection timing is correct. Or, a map from a previous install will ease this process. Note that distributors can be adjusted, but it is not advisable as it will create incorrect rotor fazing. Always leave the distributor in the manufacture position.

Crank TDC Pulse
This is the yellow pulse in the pictures below. It is used to calculate the engine degrees for spark and injection timing. There is an even 4 window signal in the distributor that gives 2 pulses per RPM which is 180° spaced apart. If the sensor is on the crank it will only have 2 teeth. The different versions may differ in length of the pulses but they are consistent in degree spacing on the rising and falling edge.

Cam Home Pulse
This is the blue pulse in the pictures below. It is used to calculate a Home signal to synchronize engine stroke. TDC will indicate to the ECU when Cylinder 1 is on TDC. This is adequate for Spilt-sequential injection and wasted spark. The Home signal will indicate when Cylinder 1 is on firing stroke. This is important to synchronize injection timing on a specific stroke for full sequential injection. Always crank the engine with no outputs connected. P1 only. Then play with the edges till no errors occur. Press C to clear the errors before cranking. If it accumulates as missing TDC or Home pulses, try another setting and clear errors again. Ignore the Error 6 Emergency shutdown when you release the key. It is normal.

Program 39 on Simulator 2 & 3
This combination below has 2 trigger setup options. The cam signal may be rising or falling. Both will produce no errors during cranking. The problem is that the actual stroke sink between the 2 settings will shift timing 180° degrees. You may have to go further in the startup procedure and look and see where is No 1 Cylinders’ spark. If you don’t see it then try the other setting.

or

Program 38 on Simulator 2 & 3

Program 42 on Simulator 2 & 3

Setting up Instructions
Make sure the distributor is in the factory position. Otherwise do rotor phasing as discussed in the manual. Disconnect all the output connectors and leave only P1 connected. This is important as wrong settings will fire coil times at random degrees causing starter failure. Make sure the jumper settings are set up for Hall sensors.

Crank the engine and look at the errors on the software. If it shows error 4 then change the Crank(TDC) edge on the software to the other selection.

It shows error 5 then change the TDC edge on the software to the other side.

You can press ‘’C’’ to clear the error. There should be no error during cranking this indicates that the ECU is happy with the setup.

The ECU can now read your trigger pattern correctly but it still needs to know where TDC and Home pulse are.

TDC is important for the coils, so we begin timing from there. Connect P2 now. Disconnect the injectors and fuel pump so that there is no fuel while we work with the timing light and spark degrees.

If you use 1 coil on the engine put the settings as below.

Gear teeth is adjustable 1 or 2, which will shift the timing 180°. This is irrelevant with a distributor. Leave it on 1 then.

Set the Maximum timing to 10 degrees so that it is easy to find the timing mark.

Now put a timing light on cylinder 1 and set the timing on it to be 0°. This will eliminate timing light errors for the setup procedure.

Now crank the engine and look at the timing mark on the pulley. If it is not around 10° BTDC adjust the Timing Sensor block it in 10 degree steps to find it. Now adjust it as close to 10 as possible. You can click the arrow to increase while someone is watching with the timing light.

If you cannot find the mark with multi coil packs then it means timing is 180° out of phase. Set the to 2 and start with the timing sensor at 0 again. Repeat the above process. Once you find it then you can connect the other coils as per drawing.

After this adjustment put the Maximum timing back to the original value.

Timing for fuel can be adjusted in 360 steps. This is to change the phase of injection between the 2 revolutions. Unfortunately, only gear programs can adjust different degrees on one revolution. There is no easy way to tell if you are on the right resolution but a dyno will indicate which one gives the better performance. This is usually found at low rpm loads. The setting to jump between the revolutions is . It may be adjusted between 1 and 2.

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