not connecting to laptop

Swedge · Post by **Swedge** » Sat Jan 07, 2012 3:12 pm

ok so i tested my ecu in my room with a 9v battery using a usb converter on my pc and it worked fine

i managed to get an old laptop with xp on it with an rs232 port on it, i plugged it in but still nothing, how do i make the software run from the rs232 port rather than 1 of the com ports?

Swedge · Post by **Swedge** » Sat Jan 07, 2012 3:42 pm

the thing is it worked on my pc in my house with the usb converter but ive just tried it in my house and it dosnt work via the usb as i have no rs232 on my main pc only the laptop with xp

Swedge · Post by **Swedge** » Sat Jan 07, 2012 4:49 pm

right so heres what ive done,

installed every usb converter drivers that came with the disk (uninstalling old one every time) and cant get it to work via usb

i connected it straight to the rs232 port and still get the timeout reading cylinder count, in device manager it is port1 (communications pot) is that the rs232 yeah?

i also set megajolt software to that as well but its still giving me the same error

ive had the ecu working with the converter on my pc but now it isnt working at all

help guys

Swedge · Post by **Swedge** » Sat Jan 07, 2012 5:38 pm

i have also tried the hypertminal thing as well and get no response using the usb converter or straight into the rs232

Swedge · Post by **Swedge** » Sat Jan 07, 2012 7:24 pm

videos quite quiet for some reason

cng1 · Post by **cng1** » Sat Jan 07, 2012 7:41 pm

If you want to use the onboard serial port that will almost certainly be com1 - it isn't guaranteed though, I've sometimes seen onboard modems grab that so do check the windows device manager. If you want to use the usb-serial adaptor then you would need to change it to match the listing in device manager.

Swedge · Post by **Swedge** » Sat Jan 07, 2012 7:47 pm

yeah ive tried using the adaptor and changing the com port but it still gives me the error, how do i check if the modem is using the com port?

theres nothing plugged into the laptop apart from the ecu

cng1 · Post by **cng1** » Sat Jan 07, 2012 8:36 pm

Take a look in device manager and see if there are any other serial ports or modem devices listed.

Swedge · Post by **Swedge** » Sat Jan 07, 2012 8:40 pm

the only things i can see under com ports are com port 1 and comne other poort for a printer or something, then i when i plug the usb in it brings up com port 4

Swedge · Post by **Swedge** » Sun Jan 08, 2012 10:23 pm

any more help guys as im stuck with a non running engine

cng1 · Post by **cng1** » Sun Jan 08, 2012 10:44 pm

All the ECUs have a base map on them as standard so you can still use the vehicle even without being access the ECU. In any case once you have the EDIS setup on there you can run in limp home mode even with the ECU disconnected so you shouldn't be completely stranded. In fact running with the ECU unplugged is a great diagnostic test of the rest of your installation.

Post by **brentp** » Mon Jan 09, 2012 6:19 am

As mentioned before, the Megajolt will work with the factory loaded Ignition Map.

When running the engine with the EDIS and Megajolt installed, you can verify the Megajolt is operational by observing the ignition timing change (while revving engine) by using a timing light.

If you can observe this, then the problems are only around communicating with your laptop.

The good thing is you've already verified the Megajolt is working when you hooked it up to the first PC. You might want to try a different laptop (friend's, etc) as a test.

Swedge · Post by **Swedge** » Mon Jan 09, 2012 10:53 am

its dfefinitely getting spark anyway as ive took the plugs out and checked them and they are sparking

its just wierd it did work on my main pc but not now, ive tried my main pc again, my mums laptop (no rs232 port) and also my older laptop which i tried using the rs232 port and also the usb converter

what about the cranking advance? will it still start even though i cant remember if i put any values in whilst it was on my main pc

Swedge · Post by **Swedge** » Mon Jan 09, 2012 10:56 am

can i just double check my lead order as well

my engine fires 1432 so would i set up my leads like this

coilpack plug number
1- 1
2 - 4
3 - 3
4 - 2

Swedge · Post by **Swedge** » Mon Jan 09, 2012 11:06 am

also with my just taking the ecu inside and connecting a bettery to it without anything else connected apart from the data cable it should still be recognised yeah? its dont have to have evrything connected to it does it?