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Megajolt Lt Jr install :P 

 

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 Post subject: Megajolt Lt Jr install :P
Posted: Fri Nov 11, 2005 9:06 pm 
Getting Side Ways
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Yesterday i received my Megajolt unit in the mail, after having the EDIS modules for a month or so it was great to finally be able to do some work :)

for those who have no idea what i'm talking about, the Megajolt is essentially a toned down version of the MegaSquirt that is developed entirely for programmable spark control using Coil packs (no fuel management).
Now since my cars on LPG and is an EF, the tune would be far from optimal, but this little beauty should help :)

So!
Today i got to work, creating a loom from the plugs i had.
Its pretty simple with the EDIS module (what tells the coil packs what to do) only requiring about 10 wires its pretty simple.
Most of the components for this come from US Fords, in my case early 90's V6's (mustangs, taurus) which to my amazement seem to share a fair few similarities.

the EDIS side of the system involves the EDIS module, the coil packs, a 36-1 tooth wheel on the balancer and a VR sensor to pick up the teeth.
Due to the EF already having EDIS it has most of these components apart from the EDIS module (built into the ECU of an EF).
the coil packs should be able to be used, the 36-1 tooth wheel is already on the balancer and the VR sensor is better known to us as the Crank angle sensor.

in terms of wiring up, its very simple, the coil pack wires are actually the same between the 2 cars (3 wires), the usual 12v and ground, 2 wires to the crank angle sensor and 2 wires to an ECU (where the megajolt comes in). On the US models, the EDIS module queries the ECU what timing advance it should apply, the megajolt is a programmed unit that allows you to control what advance is supplied to the EDIS module.
the megajolt only requires 12v, ground and the 2 wires from the EDIS module.

enough of the lecture, heres my assembled loom and bits and peices.
Image

 

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FALCN6 - EF GLi Turbo, 20" Rims, Air Bag Suspension, Straight LPG, 225rwkw
DTHWGN - EA GL Wagon, LTD Interior, Satin Black, 5.0, Turbo
RACER - EF Futura , 5.0, 5 Speed
PROJECT - 83 Thunderbird, Lowered, 18" Billet Wheels
DAILY - BA Fairmont Ghia 5.4 3V

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Posted: Fri Nov 11, 2005 9:13 pm 
Getting Side Ways
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after spending today creating the loom, i figured i'd attempt to install it in the car, now since this is a relatively simple setup there isnt a whole lot that has to be removed from the car, all i had to do was unplug the crank angle sensor and connect it to the new loom, do the same with the coil packs and setup the power aspects of the setup.
all very simple.

How ever, i got to the point where i found out the coils on the coil pack are fired slightly diffferent.
on the EF, the coils are fired in these pairs:
1,6
2,5
3,4

on the US 6's, they're fired as following:
1,5
2,6
3,4

I imagine this slight issue could be overcome by simply swapping leads 5 & 6 on the coil pack.

next issue is trying to find a source of power for the unit while the car is both cranking & running.
I'm fairly sure all the accessory's are not powered while cranking?
Does any one know of anything somewhat near the washer bottle that would be suitable for just a relay?

I'll continue to update this as i get it working :P

 

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FALCN6 - EF GLi Turbo, 20" Rims, Air Bag Suspension, Straight LPG, 225rwkw
DTHWGN - EA GL Wagon, LTD Interior, Satin Black, 5.0, Turbo
RACER - EF Futura , 5.0, 5 Speed
PROJECT - 83 Thunderbird, Lowered, 18" Billet Wheels
DAILY - BA Fairmont Ghia 5.4 3V

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Posted: Sat Nov 12, 2005 5:44 pm 
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Good work EFFalcon. I'm very interested to hear how this works out.

BTW, your photos are not working.
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Posted: Sun Nov 13, 2005 3:39 am 
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yeah, my website was down for the night.

I fitted this upto the car this morning, managed to get it running but it seemed like it had a miss.
It was running in the limp home mode "10 degrees BTDC" so had a very big lump at idle, so i'll need to try and find that problem but atleast it was running :)

I'll have more of a play later on to see if i can get it somewhat better, i realised swapping the leads on the coil pack won't work as its got to do with the engine firing order, not the EDIS module (paired according to firing order)

 

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FALCN6 - EF GLi Turbo, 20" Rims, Air Bag Suspension, Straight LPG, 225rwkw
DTHWGN - EA GL Wagon, LTD Interior, Satin Black, 5.0, Turbo
RACER - EF Futura , 5.0, 5 Speed
PROJECT - 83 Thunderbird, Lowered, 18" Billet Wheels
DAILY - BA Fairmont Ghia 5.4 3V

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Posted: Sun Nov 13, 2005 1:00 pm 
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i am very interested in how this works as i am a fellow gased ef, with a petrol ecu.

as for the power you could run it strait off the battery with a switch in the cabin, so it would act as a kill switch as well, you just have to remember kill switch then key when starting??? just an idea.

good luck and i am greatly looking forward to seeing your results.

 

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Posted: Sun Nov 13, 2005 1:15 pm 
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ah i'd rather just give it an ign feed, everyone else does :P

 

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FALCN6 - EF GLi Turbo, 20" Rims, Air Bag Suspension, Straight LPG, 225rwkw
DTHWGN - EA GL Wagon, LTD Interior, Satin Black, 5.0, Turbo
RACER - EF Futura , 5.0, 5 Speed
PROJECT - 83 Thunderbird, Lowered, 18" Billet Wheels
DAILY - BA Fairmont Ghia 5.4 3V

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Posted: Sun Nov 13, 2005 3:43 pm 
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sounds like it going good!

ps pics still dead!

 

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Posted: Sun Nov 13, 2005 4:46 pm 
Getting Side Ways
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should be fixd.

 

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FALCN6 - EF GLi Turbo, 20" Rims, Air Bag Suspension, Straight LPG, 225rwkw
DTHWGN - EA GL Wagon, LTD Interior, Satin Black, 5.0, Turbo
RACER - EF Futura , 5.0, 5 Speed
PROJECT - 83 Thunderbird, Lowered, 18" Billet Wheels
DAILY - BA Fairmont Ghia 5.4 3V

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Posted: Sun Nov 13, 2005 5:25 pm 
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nice bed sheets john. get them at target did ya? :P

whats this actually going to acheive? or hoping to acheive?
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Posted: Sun Nov 13, 2005 5:34 pm 
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he saves the silk ones for you.

 

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Posted: Sun Nov 13, 2005 6:03 pm 
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hoping to acheive.
so often we hear people b**ch and whine about dual fuel systems and the only way to get power out of the LPG is to have the engine tuned for it.
Essentially this unit will enabled the engine to be 100% tuned for LPG via advanced ignition timing.

 

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FALCN6 - EF GLi Turbo, 20" Rims, Air Bag Suspension, Straight LPG, 225rwkw
DTHWGN - EA GL Wagon, LTD Interior, Satin Black, 5.0, Turbo
RACER - EF Futura , 5.0, 5 Speed
PROJECT - 83 Thunderbird, Lowered, 18" Billet Wheels
DAILY - BA Fairmont Ghia 5.4 3V

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Posted: Sun Nov 13, 2005 8:41 pm 
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another update, seems the crank angle sensor signal can be split without problem, i tapped back into it and fed it back to the ECU, the cars a lot happier with it running properly.
tacho signal and everything is based from the crank angle sensor which is good to know
So yes, now that the cars happy i have the car fooled into thinkings its doing everything it should, there is still a miss on what seems to be cyl's 1 & 4. i'll try a few things to try and get that fixed tomorrow.

the ISC is also cracking it, when connected it opens to its wide open position and the car's idling at about 1300rpm, when disconnected the car is on the virge of stalling and then does, not sure what to do about that yet

 

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FALCN6 - EF GLi Turbo, 20" Rims, Air Bag Suspension, Straight LPG, 225rwkw
DTHWGN - EA GL Wagon, LTD Interior, Satin Black, 5.0, Turbo
RACER - EF Futura , 5.0, 5 Speed
PROJECT - 83 Thunderbird, Lowered, 18" Billet Wheels
DAILY - BA Fairmont Ghia 5.4 3V

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Posted: Sun Nov 13, 2005 8:56 pm 
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reset the base idle?

 

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Posted: Sun Nov 13, 2005 9:41 pm 
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just set the idle the "old school" way....lol

how much has this cost you so far???

 

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Posted: Sun Nov 13, 2005 9:44 pm 
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$220 delivered for the MJLJ unit, assembled and tested.
$130 for 2 EDIS6 modules from the US, one of which i can sell.

thats all i've spent.

 

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FALCN6 - EF GLi Turbo, 20" Rims, Air Bag Suspension, Straight LPG, 225rwkw
DTHWGN - EA GL Wagon, LTD Interior, Satin Black, 5.0, Turbo
RACER - EF Futura , 5.0, 5 Speed
PROJECT - 83 Thunderbird, Lowered, 18" Billet Wheels
DAILY - BA Fairmont Ghia 5.4 3V

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