Thread: V8 Disco 2 fuel issues

Rover tech had it off last week when they did the coil packs and found a few small leaks on the lpg connections, I changed the leads with it on, I have it down to 20 minutes to change them out with a cold motor.
Was thinking of taking it off myself and checking everything again as just running out of ideas.

Thanks for the suggestion.

Did you speak to Kevin when you were at rovertech, if so what did he say, I'm sure it wouldn't have him stumped for long

Originally Posted by discorevy

Did you speak to Kevin when you were at rovertech, if so what did he say, I'm sure it wouldn't have him stumped for long

Lets Just say the words he used after 6 hours on it and new coil packs and it was them that did the vac leaks. I don't think he wants to see it again......... He suggested the O2 sensors so I did them.
LOL this morning in 3 degrees it idled high with a miss but drove really well with very little back firing.
See how it goes when I go out at 10 for a meeting and go from there!

How far did you drive this morning? If you have a manifold leak it will run better when cold due to the enrichment cycle when cold on Petrol. (I'm not sure how the new LPG systems work with that.)

You could unplug the brake booster and crank vent on the upper manifold and block them off and see how that goes. I had a small leak on the "O" ring that seals around the master cylinder once.

I check for manifold leaks with a small disco smoke machine I bought off ebay for $35 and a bright LED torch. You pump the smoke into the brake booster connector and then get your torch out and see if you can see any smoke leaking out around the manifold. Works best in a dark garage with no wind.

I drove for 40 minutes in traffic and when it warmed up with the heater on it did run much better.
I still misfiring and spluttering at take off and low rev's.
Tried the LPG today and it is worse than it has ever been missing at speed and ran out of pedal to maintain 80km's. Odd one, another issue to the list!

I'm thinking absolutlely a manifold leak. I can't think of anything else.

If it was the 02 sensors it would just go to OPEN fuelling. Rich but not very noticeable.

If you drove for 40min it would have warmed up 35min ago.

If you are back firing it has to be lean (e.g. Leak) or the leads are totally wrong.

Although you must have small hands to change leads without removing the upper manifold I'm sure if you can do it in 20min you've done it before. So all that should be in order.