28 replies to this topic

[minivanman8]

I might try ordering a trigger wheels cable in the morning

[welshdan]

It was very frustrating when mine wouldnt work.

I knew mine was installed properly, so it was a case of stepping back and replacing parts until the problem was resolved. Start with the cheaper items, but you have to be sure what you have done so far is right ie its all installed properly etc.

This is very frustrating i know, but its night and day once sorted compared to a dizzy...

[minivanman8]

How much should the timing advance with a blip of throttle? At the mo it's 2-4 degrees (although the timing is about 5-10 degrees out

[welshdan]

Is the megajolt talking to the computer? If so thats half the battle. Sadly if you bought the motor with megajolt fitted, you might have to check the work of others. Have seen so many bodges over the years that i would only trust my own work.

I believe that there is 5 degrees adjustment either way on mj. I got my whole bottom pulley wheel machined by a guy on tm, its spot on to the very degree.

Check, check and check again the timing to be sure whats going on with it as it stands....

[minivanman8]

The timing is 5 degrees. Mega jolt isn't talking to the laptop hence this topic! The only way I know of to figure out if the mj is working is with a strobe to see if the timing advances with a blip of throttle. Would a 2 degree advance with a blip indicate that mj is working??

[welshdan]

You can run the engine and check the timing using just edis, with the mj unit unplugged...

[Shukran]

The timing is 5 degrees. Mega jolt isn't talking to the laptop hence this topic! The only way I know of to figure out if the mj is working is with a strobe to see if the timing advances with a blip of throttle. Would a 2 degree advance with a blip indicate that mj is working??

 

MVM

 

Get another USB to serial cable with it's own driver this could easily be your problem as they are not all created equally.

 

Have you got access to someone with another MJ setup? If so, try your cable and notebook. Alternatively get hold of an old computer, even a desktop, with a serial port, at least you would be able to eliminate the USB to serial setup.

 

HTH

Mark

[minivanman8]

Every cable I bought came with a disc with driver on.

 

I unplugged MJ today and started it up. The timing advanced the same amount with a blip of the throttle as with MJ attached.

 

Rev counter stopped working, so obviously MJ is doing something when connected.  When I plugged MJ back in, it retarded the ignition by about 5 degrees - I can only assume this is as a result of the timing being out.

 

So, what is this likely to mean? I'm getting closer to ripping the box out by the second!

[Gr4h4m]

Where are you based. Maybe someone with a known working setup could connect it to you car?

I had this with a friends setup and it was the lead from the mj and to the convertor it had a wire pulled out. They are simple to check with a continuity checker and a multi meter.

[minivanman8]

Based in sandhurst, Berkshire. I don't know anyone who uses megajolt.

I tried plugging the serial cable into my mums laptop this evening, but I'm not quite sure how that works. What should I do about comm port?

[Gr4h4m]

Iirc A com port is assign by the driver / OS when you install and then insert the dongle.

You need to make sure the same com port is entered into the mj software.

If you're running xp, you then need to make sure that you insert the dongle into the same USB port on your machine. I just got the cheapest usb convertor from maplin and it worked. I know some people have issued with different makes of dongles.

It could be the rs232 cable that came with the mj, I think there are only a few wires connected. There is a diagram on the autosport labs web site so you could check it or make a new one.

Once your over this hurdle you will never run a dizzy again.

[HUBBA.HUBBA]

dig out an old dizzy and buy an aldon amethyst. job done!

[welshdan]

If you must go down this route lol, i have a cheap dizzy in the for sale section. Though i would stick with the mj if you cab get ut working

[minivanman8]

I've ordered a custom h and h dizzy setup and sold my mj to zik. Sounds like he has more patience than me!

Thanks to all of you for your help.