Intermitant miss-fire

T3tone · Post by **T3tone** » Thu May 24, 2007 10:20 am

Hi,
Im asking on behalf of a friend whos running megajolt and is experiencing the odd mis-fire. He has staged led shift lights connected to the user outputs and every time the engine miss-fires all the shift lights flash together. The earths for the jolt and module are connected together on the chassis with other standard earths. The 12v feed for the jolt and module runs from the ignition barrel. Seems like a spike issue to me! Has any one else got any ideas?

Many thanks

Tony.

MartinM · Post by **MartinM** » Thu May 24, 2007 10:00 pm

If the shift lights are flickering then it's almost certainly noise being picked up on the PIP line from EDIS to MJLJ.

The two standard fixes are:
- upgrade to V3.2.1 firmware in the MJLJ (see http://www.autosportlabs.net/3.2.x/2.8. ... rade_guide)
- make sure the PIP (and SAW) lines between EDIS and MJLJ use screened cable. Screen should be connected at the EDIS end (to pin7 on 4-cylinder EDIS) and left unconnected at the MJLJ end

Martin

T3tone · Post by **T3tone** » Thu May 31, 2007 3:55 pm

Thanks Martin, managed to flash the latest firmware onto his mjlj so just needs a test drive now.

EDIT- Seems to have sorted the problem, he just called me and sounded pretty pleased, thanks again.

MartinM · Post by **MartinM** » Fri Jun 01, 2007 9:38 pm

No problem