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Update on this: Advancing the timing to 14 degrees made a big difference but there was still a slight miss at low RPMs. I took the car to Leeds LPG and it turned out the lambdas had not been hooked up to the LPG ECU (which explains the duff readings) and it was running a V8 base map. He hooked...

Sure, I'll advance and use premium petrol as far as possible. Will update with findings

After replacing the distributor, amplifier etc. I had to retime the ignition, rehooked up vac advance and tested that it works. I have started looking at the MAF and O2/Lambda sensors as a next port of call... With the engine at idle the MAF reads ~0.45 Which seems correct? HOWEVER As soon as...

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...

Hi all, (Proud?) To say I've purchased my first Land Rover, a 1997 3.9 V8 Discovery 1 with LPG. 178,000 Miles on the clock, I've never really been into Land Rovers but bought for £800 just as a winter run-around and immediately fell in love with it. Obligatory photo: