problems with mjlj v4

zetectunerchris · Post by **zetectunerchris** » Mon Jan 30, 2012 7:42 pm

hi i have a prob with my mjlj v4 running 4.0.2 software , have used this kit on my old laptop with no probs for past yr or more, last week i connected my lap top with a serial port, connected up to mj unit fine went to play with my map settings and all of a suuden i lost comunication ,time out error with mj have bought new cable thinkin could be a dodgy connection but still have no luck . have tried using dif laptop with vista , no luck even tried a usb adaptor on my old lap to with no luck, any1 got any suggestions ,thanks chris

Swedge · Post by **Swedge** » Tue Jan 31, 2012 6:52 am

im having the exact same problems, i had it working and now its not its only a couple months old so the guy that built it for me has got it and gonna try it out and if he cant hes gonna replace it for me

zetectunerchris · Post by **zetectunerchris** » Tue Jan 31, 2012 10:15 am

well my mjlj still works when connected to the car ie adjusts my ignition but it will not let me make any comunication with it,

Swedge · Post by **Swedge** » Tue Jan 31, 2012 3:18 pm

same as me mate, everything works on the car but its suddenly stopped connecting to the pc or laptop using both a usb dongle and db9 port

Post by **brentp** » Tue Jan 31, 2012 4:05 pm

Hi Chris,

When testing it on a new PC you definitely want to double check the serial port you have for the serial port (or USB adapter) matches the setting you have in the Megajolt software.

It's really good to note that it's controlling ignition advance- this means the unit is alive and running - the problem is likely an issue between the megajolt and the PC.

Like documented here:
http://www.autosportlabs.net/MJLJ_V4_Op ... erial_Port

Since you're in the UK, you might be able to find another UK megajolt user that has a 'known good' working PC configuration and have them plug into your Megajolt with their cable for testing purposes.

Let us know what you find out!

zetectunerchris · Post by **zetectunerchris** » Tue Jan 31, 2012 5:08 pm

brentp wrote:Hi Chris,

When testing it on a new PC you definitely want to double check the serial port you have for the serial port (or USB adapter) matches the setting you have in the Megajolt software.

It's really good to note that it's controlling ignition advance- this means the unit is alive and running - the problem is likely an issue between the megajolt and the PC.

Like documented here:
http://www.autosportlabs.net/MJLJ_V4_Op ... erial_Port

Since you're in the UK, you might be able to find another UK megajolt user that has a 'known good' working PC configuration and have them plug into your Megajolt with their cable for testing purposes.

Let us know what you find out!

hi brent it wont work on my old laptop which only gets used for my mjlj i have used since buying the mjlj 2yrs ago it just wont connect, tried the usual com ports but all seams ok!

Swedge · Post by **Swedge** » Wed Feb 01, 2012 6:20 am

do you know anyone else with a megajolt ecu to try on your pc/laptop?

zetectunerchris · Post by **zetectunerchris** » Wed Feb 01, 2012 9:33 am

Swedge wrote:do you know anyone else with a megajolt ecu to try on your pc/laptop?

no im affraid not wanted to try my mjlj on some!s computer as need to work it out so i can get it rolling roaded

Swedge · Post by **Swedge** » Thu Feb 02, 2012 6:24 am

just to let you know i sent my ecu to the guy i bought it from and he cant get it to connect to a working computer either, he has several ecus's that do connect to it

he says he's gonna pin test it and check the components

Post by **brentp** » Thu Feb 02, 2012 5:46 pm

Thank you for the update. Please encourage the guy you're working with to share his findings on the forum here so we can all learn from the problem!

Swedge · Post by **Swedge** » Fri Feb 03, 2012 2:09 am

yeah i will do, he sells the ecu's around the forums i visit, mostly vauxhall car clubs

not sure if he builds them up or what but thier not too bad priced and he makes looms to whatever spec i want too

ill let you know what he says

cng1 · Post by **cng1** » Fri Feb 03, 2012 9:04 pm

Swedge, I'd be grateful if you could PM us your guys details. We're always on the lookout for people who can help out with looms etc for people who can't (or don't want to) do such things themselves and can assist people with their installs.

zetectunerchris · Post by **zetectunerchris** » Sat Feb 04, 2012 3:27 pm

cng1 wrote:Swedge, I'd be grateful if you could PM us your guys details. We're always on the lookout for people who can help out with looms etc for people who can't (or don't want to) do such things themselves and can assist people with their installs.

hi if any1 wants wiring looms made up in the south west area i will make them for a small fee, ref my problem have solved it by using a new usb adaptor off ebay , worked straight away and reasonably priced, will upload a link, on another matter can i remove the built in map sensor and move it , is there any ford or similar part i could use? chris

zetectunerchris · Post by **zetectunerchris** » Sat Feb 04, 2012 3:30 pm

usb adaptor http://www.ebay.co.uk/itm/280801203542? ... 1497.l2649

Swedge · Post by **Swedge** » Mon Feb 06, 2012 3:21 pm

cng1 wrote:Swedge, I'd be grateful if you could PM us your guys details. We're always on the lookout for people who can help out with looms etc for people who can't (or don't want to) do such things themselves and can assist people with their installs.

yeah ill speak to him and see what he says and ill send you his info if he says its ok

this is the loom he made up for me

worked first time when i plugged it all in and very well made with all ends shrink wrapped etc, all he asked for was the lengths that i needed i.e. crank sensor - edis, edis-ecu etc

ill ask him then let you know