Ilya

Mr B. I’m going to change the spark plugs to the original NGK, but which should I use for a Legacy 2004 MK4 H6 EZ30 engine, with an LPG conversion on Dual fuel with petrol? The original are NGK ILFR6B but as I understand for the LPG it’s better to have NGK LPG7 with the lower heat level? Would the LPG7 cause the same issue I have now when running on petrol? And a question as for the torque, the NGK recommend 25-30Nm while I believe the manual said 21Nm when I change spark plugs last. Any advice?

Quick question, running a Legacy 2004 MK4 H6 EZ30 engine, with an LPG conversion on Dual fuel with petrol. Spark plugs need to be changed but which of the NGK should I go for? The original ILFR6B or the LPG7 with the lower heat level? Would the LPG7 cause issue when running on petrol? And a question as for the torque, the NGK recommend 25-30Nm while I believe the manual said 21Nm (I’ve lost the manual and using the one online) Thanks.

Great thanks, I’ll have them all individually checked in this case then.

Yep no flushlube, will look into getting one thanks. as for the engine, it runs smooth on LPG especially once warmed up. In fact even smoother than on petrol. But at the start it does have rough idling when cold starting.

Not sure of the system I run but the spark plugs are not the original NGK that are recommended for the engine but the ones that are recommended for LPG as they are a level colder than the original ones. the coils have been replaced as well. could that cause the engine light issue when I’m on petrol?

Honestly not sure about if I have the flashlube system, I believe it does. Thanks for the forum, helpful as well. Would you say I should always go a visit a garage that specialises in LPG when there is an engine issue?

I’ve recently put in new spark plugs (ER14YS Brisk Silver) and coils (Used Diamond Fk0140) in my Subaru Legacy Mk4 EZ30R engine that has also LPG conversion, following a constant check engine light. Now when I cold start and then switch to LPG the car stalls as I move off, however if I start of on petrol and drive for a bit and then switch to LPG it’s fine. Is there a way of fixing that I can drive on LPG straight off? Also, I’ve noticed that when I cold start on petrol and drive for a bit, I get a brief flashing check engine light on low revs such as while standing at traffic lights but it then disappears as I move on. It eventually seems to stop flashing all together or when I switch to LPG once the engine warms up. Any advice on how I can fix that? Or if anyone could recommend a garage that knows about Subarus in west London? And should it be a garage that also works with LPG? Thanks :/