Jeep 4.0l year 2001 i6 megasquirt

[grupovieira]

Hi to all im installing a ms2 extra because im turbocharging this engine and im having problems with the crank it has a flexplate with 12holes 3x4 holes
Whats the trigger to choose in order to have the correct signal
Br pedro

[grupovieira]

Is the jeep 2000 still online avaiable to megasquirt 3?
Because for what ive seen that would fix my problem
Br Pedro

[tallyho520]

You really should have researched this before purchasing megasquirt. I setup ms2 on my 1997 4.0l. I switched to batch fire and my engine uses a distributor. Your engine has a camshaft position sensor in place of the distributor. I know yours is coil on plug but I forget if it's wasted spark or not. Anyways, the ecu needs to be able to recognize where in the cycle the engine is, so megasquirt needs a cam input, or a missing tooth on the crank wheel. Here was my solution...
I made a concentric spacer and used pins to clock the toothed wheel to the inner portion of the harmonic damper.

[grupovieira]

Thanxs for your reply thats my next move ill order the 36-1 and go that way
Br pedro

[tallyho520]

The other option is to use the cam signal in addition to the crank signal. The ecu just needs to know TDC of cyl1.

[grupovieira]

Back again, so i ve used a 60-2 wheel and stil cant get to fire it, i have spark and fuel but it seems its out of sync i´m only using the crank trigger with missing tooth what am i doing wrong i´ve connected the injectors in firing order 1-5-3-6-2-4 so injector 1 with 5 3 with 6 etc and the coil with ignition 12v and ign 1 2 and 3 the crank sensor its mounted 11 teeth before the gap so i assumed 66º what am i doing wrong will i have to go distributor?????????

[Matt Cramer]

[rickb794]

With fixed timing set to 15°, Put a timing light on it and adjust the trigger angle to bring the spark to 15°.

[gsune]

Hi. i have a cherokee stroker 4.5 running ms2 v3 36-1
did you solved?

[rickb794]

If you are only using a crank trigger you can only use wasted spark mode no sequential ignition. Wasted spark or wasted COP or a single coil & distributor.
You need both a cam signal and a crank signal to do sequential COP

Doesn't that crank trigger pattern work with the renix decoder? Maybe that was that an earlier model AMC jeep that used a renix system?
If so can you switch to a Renix style flywheel?

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The OP has not identified the crank pattern in a MS way.
You say it has 12 "teeth" but that is really holes isnt it?
3 groups of 4 holes

If there was a continuous ring of holes how many would there be?
this is the first number
then there are three groups of missing holes to match the 3 groups of 4
15 -1-1-1
18 -2-2-2
21 -3-3-3
24 -4-4-4 4 holes - 4 holes missing - 4 holes - 4holes missing - 4 holes - 4holes missing. 6x4 = 24
27 -5-5-5
30 -6-6-6
33 -7-7-7
36 -8-8-8
39 -9-9-9
42 -10-10-10
45 -11-11-11
48 -12-12-12
51 -13-13-13
54 -14-14-14
57 -15-15-15
60 -16-16-16
63 -17-17-17
66 -18-18-18
etc
All of these combos have three groups of 4 holes
The actual patten needs to be described in this manner to check compatibility with existing MS decoders