Crank Trigger 18-2-2-2 Wheel

[bpetkus]

Ok guys I need help with setting up an OEM trigger wheel.

Applications: Chrysler, Dodge, Jeep V6/I6 applications 1991+

These vehicles are equipped with a 18-2-2-2 trigger wheel. The wheel is part of the flywheel or flexplate. It has 3 groups of 4 open windows on the wheel with 2 missing windows between the groups.
I am not sure if i can use the (Subaru) 36-2-2-2 crank trigger method and change 36 to 18, if that is possible. Since this trigger method uses windows instead of teeth megasquirt will most likely have to invert the trigger signal in the software.
I did not check the location of the wheel at #1 TDC or at cam sync. I can provide that info if needed.

can someone give me some direction or add a 18-2-2-2 trigger support.

Thanks much!

[muythaibxr]

That would have to be a custom wheel decoder, so as the code is now, it won't run with that wheel.

Ken

[jsmcortina]

Two Jeep patterns are included in the recent alpha firmwares, although whether it covers your application I'm unsure.
The patterns look like:



I can't find the reference to the other pattern that the code is intended to support.
I've called the wheel modes Jeep 2000 and Jeep 2002.

James

[bpetkus]

Thanks James. That is it. only difference is cam signal which can be like you posted or as a 1/2 moon type.

18-2-2-2.. it was late maybe i couldnt count that late.. lol

[jsmcortina]

The "2000" code expects a single cam tooth, the "2002" code needs that funky cam pattern.

James

[gsune]

[gsune]

[gsune]

[jsmcortina]

It already works doesn't it?

James

[Nickel_5000tq]

I m on the same project. I produce MS3X for tuners but this time i do the install.

All the signals (inj, ign, crank cam) match the stock running engine (on the stock ECU). But when cranking it kick bacward !!!

I added 2 trigger wheel pattern on the Jimstim.
1:Stock 4.0l as above ( moded stock jimstim signal, cam falling and rising half between 5-3 and 2-4, was not the case with the original jimstim signals)

2: Moded cam phase 4.7l stroked engine. rising cam 2 teeth before the stock. Same fo falling cam.

Its for testing purpose.

The megasquirt run in parallele of the stock ecu. The stock ECU control everything now. Megasquirt only logging.
On the jeep the signals are synced, but not n the jimstim ......well.....

[jsmcortina]

What timing do you get during cranking?

James

[Nickel_5000tq]

Hi James.
Setted to -10 degrés. Tried 0. No effect.
For now It s not syn with the jimstim but its sync on the Jeep. I ll post the Jeep signals and the jimstim signals. I can send the jimstim text section of trigger Wheel if ever its useful for users.

[Nickel_5000tq]

This is the basic ignition settings of ms3x ecu.
See the original jeep 4.0 stroked to 4.7 cam/crank vs my jimstim signals.
The ECU cant trig

jimstimJEEPvsJeep27nov2015.JPG

[Nickel_5000tq]

Composite logger

compisitelogger2015.JPG

[Nickel_5000tq]

I ll check the timing with the test light tomorrow.

[Nickel_5000tq]

Since it does not sync so I cant do much. Something might need in the code.
We ll make some more test today on the Jeep.

[Nickel_5000tq]

Hi James.
The start and works well with Jeep 2000 settings.
BUT it still no synced.


It start well and run well. The kicking problem is solved by mismatch 2 ignition wires.

[jsmcortina]

If it starts and runs then it must have sync.

James

[Peter Florance]

Hi James.
The start and works well with Jeep 2000 settings.
BUT it still no synced.


It start well and run well. The kicking problem is solved by mismatch 2 ignition wires.

Datalog?

[prof315]

If it starts and runs then it must have sync.

James

I'll bet his Tuner Studio dash doesn't match his firmware version