Hi all,

I need help, I've just changed my spark plugs and leads on both banks & replaced the spark plug seals and rocker cover seals. Now it has a miss in it, when I start to take off. I've tried to figure it out but I’ve done everything that I can think of to rectify the situation. E.g. vacuum hoses and all bolts are on properly. Only thing that I didn’t do is the Plenium Gasket, which I didn’t remove or tamper with.

let me know what you guys think. Cheers

I gather the miss wasn't before. just re-trace your steps and double check each one. ie, firing order on the leads , Leads pushed on the plug properly, did a plug fall out of the socket and close a gap when fitting etc. Don't think a plenum gasket leak would give you the problem you've got.

Cheers Dave

Is it possible you got a dodgy lead in your pack? Can you check the resistances against what they are supposed to be and double check each end is plugged in properly?

Cheers dave I will pull down the motor tommorrow and check. Cheers

It could be a dodgy lead but being top gun brand not sure will check anyways cheers

Top Gun leads have been known to cause misfires with LPG engines , i'd be checking them again very carefully or getting Bosch leads. or even genuine Mitsu.

could you have left a vacumn hose off maybe.

Did you drop a sparkplug? Even if you haven't its always a good idea to check them as you take them out of the box to see if the gap is still there incase somethings happened in transit.

check the earth that runs from the top of the upper intake to the firewall. i broke mine when i did my plugs and it wouldnt run right because the other earths were corroded up. especially the one under the batter. but it is most likely to be a dodgy lead or plug. usually a vacuum leak will affect idle too.

On my Pajero (on LPG), I fitted a set of TopGun leads. Absolute crap. After about 10000 km, it backfired massively and blew the guts out of the air flow meter. When I got it home and started to change the leads, I checked it in the dark, and you could see every lead - etiher arcing to earth or you could see the core glowing thru the insulation where they weren't arcing. I use only Bosch or NGK leads now. NEVER Top gun

Cheers guys,

I've just took it all aprt again today and retraced my steps, I think it turned out to be that I had not pushed one of the leads on properly and also I changed a vaccum hose around. All is sweet now, except for a noisy muffler. Anyone know a cheap muffler place or second hand for one cheers