Frank3h
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| posted on 12/10/11 at 12:02 PM |
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Megajolt V3.0.0 troubles
Hi all,
This is my first post on Locost Builders and i have been pointed in this direction by the Tiger boys.
Ok so I have a Tiger Cat E1, Running a 2 litre silvertop zetec ford mondeo engine, Honda Fireblade bike carbs and a V3.0.0 Megajolt. So here is my
issue. I took it to power engineering for a rolling road tune up but they could not talk to the MJ no matter what they tried. They gave it a power run
and it came out at 126BHP 
As the car was working fine but just down on power i still took it to the Track Day i had booked at Oulton Park, What a car ! amazing through the
bends but got onto a straight and was noticebly slow
So after much tinkering about with my own laptop and speaking to the very nice guys at Chester motor sports I still could not get it to talk to my
laptop, I kept getting "Time out reading runtime data" on the correct port for the Serial to USB lead to my Laptop. Ok i thought maybe
something wrong with the MJ itself so i sent it back up to Chester motor sport, they tested it and it worked fine on there setup and was putting out
148BHP with thier map. ( I must add at this point that the MJ was not purchased from them, the guy who built it purchased it from the USA and then
sent it to Chester motor sport for a map ).
So I had a very nice phone call from CMS saying that if i brought the car up to them they would more than likely be able to sort it all out only
problem being they are 200 miles away
So does anyone have any ideas on what might be going on ?
I am torn between splashing out on a full new Weber alpha carb system for the car, or trying to get what i have working already !
Thanks for all the help in advance !
Frank3h
[Edited on 12/10/11 by Frank3h]
Tiger Cat E1
2.0 Zetec Silvertop
Honda Fireblade Carbs
Megajolt Ignition System
Red 
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MikeRJ
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| posted on 12/10/11 at 12:15 PM |
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Lots of people have trouble with USB/Serial adapters, do you have access to an older desktop PC or laptop with a built in serial port that you could
check the MJ with? You can power the MJ from a PP3 battery just for testing comms on a desktop PC.
If you put your location in your profile there may even be a forum member nearby that has a suitable PC.
[Edited on 12/10/11 by MikeRJ]
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Frank3h
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| posted on 12/10/11 at 12:29 PM |
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I dont think its the cable ( i could be wrong ) as it does recognise that there is something there on that comport ! but its doesn't get the
info off the MJ ?
Tiger Cat E1
2.0 Zetec Silvertop
Honda Fireblade Carbs
Megajolt Ignition System
Red
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r1_pete
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| posted on 12/10/11 at 12:35 PM |
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I'd try another USB/Serial adapter, Megajolt is notoriously sensitive to adapters especially with Vista, I have one with the Prolific chipset
which works on xp, but not vista or win7, but I do keep an old laptop with a serial port for Jolt/Squirt use.
Where are you? someone local may have a laptop or working adapter you could try.
[Edited on 12/10/11 by r1_pete]
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big-vee-twin
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| posted on 12/10/11 at 12:35 PM |
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Sounds like a cable problem to me, there are lots of USB/Serial cables and there is only a few which seem to work with Megasquirt/MJ.
Duratec Engine is fitted, MS2 Extra V3 is assembled and tested, engine running, car now built. IVA passed 26/02/2016
http://www.triangleltd.com
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Frank3h
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| posted on 12/10/11 at 12:39 PM |
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Hmmmm OK I am in Aylesbury
Will try Maplin for a new lead
Tiger Cat E1
2.0 Zetec Silvertop
Honda Fireblade Carbs
Megajolt Ignition System
Red
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Norfolkluegojnr
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| posted on 12/10/11 at 12:47 PM |
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I've had similar issues - cable is the most likely answer.
You need a computer with a RS232 serial port, i'm happy to help (im in Norwich) if you can get the car over here.
Alternatively, ask friendso or family members if they have an old computer lying about in the loft. Older PCs often have serial ports where as newer
ones don't.
Also, i wouldn't pay to much attention to BHP readings from bench testing an MJ. More important is the carb jetting/needles, head, inlet,
exhaust etc. The MJ only controls ignition advance, only one component of tuning the engine.
was 125 at the wheels or at the fly? at the fly that's about right.
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deezee
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| posted on 12/10/11 at 12:51 PM |
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I got my serial to USB adapter from Maplin. It works fine. Installed the drivers for the adapter and Megajolt shows up no problems. I would suggest
its the cable connection OR the operating system doesn't support the drivers for the serial to USB adapter. There is a few threads on the
MegaJolt Forums talking about these kind of problems.
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blakep82
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| posted on 12/10/11 at 03:21 PM |
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first up there are 2 types of serial cable, straight through and crossover (or null modem cable) i think its the straight through you should have. so
make sure what type it is! crossover cables are for connecting PC to PC, a pc will send on a particular pin, and receive on a different pin, if the
PCs send pin isn't connect to the MJs receive pin, well....
go to the control panel device manager, and check which com port the USB works on, for the life of my i can't remember how though, think you
have to have the usb/serial adapter plugged in (so plug it in and restart the computer for the best chance of finding it) back to device manager and
open up the port (com&lpt) tab, you should see it in there i think, and it will tell you which com port it uses, then open up megajolt software,
go to configurator optins, and change the com port to match whichever one shows on the device manager
[Edited on 12/10/11 by blakep82]
________________________
IVA manual link http://www.businesslink.gov.uk/bdotg/action/detail?type=RESOURCES&itemId=1081997083
don't write OT on a new thread title, you're creating the topic, everything you write is very much ON topic!
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Frank3h
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| posted on 12/10/11 at 03:50 PM |
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Thanks all i will keep trying
Tiger Cat E1
2.0 Zetec Silvertop
Honda Fireblade Carbs
Megajolt Ignition System
Red
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snapper
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| posted on 12/10/11 at 04:20 PM |
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My problems with a serial adaptor have always been a com port mismatch, every time I plug it into the computer it moves to a different com port, the
megajolt only reads up to com port 10.
So I go into devise manager and if the serial adaptor is on a com port higher than 10, delete some previous and fire it up again.
I eat to survive
I drink to forget
I breath to pi55 my ex wife off (and now my ex partner)
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