Hi all,
My 3.9 Discovery 1 has started to misfire/judder really bad below 2000 rpm and at light throttle. Seems to go away at higher rpms
It is particularly bad on a cold morning and results in a big drop in power / judder.
The system is a Bigas Sequential (SIGN).
I have replaced the plugs to NGK BPR6ES and gapped to 0.8
New leads
New distributor, rotor, cap and ignition module
New coil
Could it be a sticking injector?
I have purchased a data cable to hook into the Bigas ECU.
Judder / Misfire on LPG - Fine on petrol
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I have taken a video, I apologize for the shakey video and background/road noise (It's an old squeaky land rover :/)
https://goo.gl/photos/j3eyGBk1VDk43atj8
https://goo.gl/photos/j3eyGBk1VDk43atj8