nl pajero lpg conversion

I have been told intake manifold has to be removed to get to 3 plugs... but on another site read that the manifold is removed to fit lpg anyway hence very little extra labour. I will have to dig deeper
Kc

the pajero has the spark plugs in the top of the head in later models that are covered by the plenum chamber(inlet manifold).
i cant see why the manifold will have to be removed to fit gas.
i just did a timing belt plugs ect on a gas pajero and cant see why it would have to come of.
im not sure but id be getting platinum plugs with a different heat range to suit gas and there around $20 each.
cheers

If your Pajero is fuel injected my advice is to go to Direct Injection which is superior in every way to the standard method. I had my 91 V6 4Runner done three weeks ago and it performs better on gas than it does on petrol. Mine was converted to Direct Injection and have had no problems with back firing . It cost me a little bit more , but the money spent was well worth every Dollar. If you convert to the conventional system then an anti-backfire valve MUST be placed in the throttle body before the butterfly.

You do need to change your spark plugs, but not to Platinum or anyhting expensive. I run the normal NGK plugs and I replaced the plug leadsd with new Champion steel leads from Repco.

Any one who tries to kid you into changing plugs for expensive ones and any other modifications is ripping you off and laughing all the way to the bank at your expense !!!!!

An anti backfire valve sounds like excellent insurance..... just in case. can you give me any further info as to purchase from? cost? fitting etc. I will also enquire about direct injection but suspect it is approx $1000 more
regards Kc

When I was investigating getting my 3.0 litre V6 4Runner converted to gas, I went through what you are going through and was fed a lot of cock and bull by so called experts. I then went to a company called Sprint GAs Australia, who makes some terrific gas conversion equipment. One of the subjects I spoke to him about was the problems of backfiring . He told me that not every one knew about the anti backfire valve, and he promptly showed me one which looked like it was made from high grade aluminium aircraft material. He stated that it fits right in the throttle body before the butterfly that regulates the the amolunt of fuel and of course the RPM. As soon as the sensor detects the likelihood of a backfire, it shuts of the gas supply to the combustion chamber and prevents the risk of the engine backfiring and blowing your airfilter box and all the plastic pipes and air sensor valves to smitherines - not to emtion the risk of fire

As I dont know in which part of the the country you live in its hard for me to recommend anyone. However if you are in any of the major capital cities, look for GASPOWER AUSTRALIA, or SPRINT GAS and they will point you on the right direction.

I replaced the plugs and the leads on my car as the plug leads are the original and the plugs were were fitted about 20,000 km ago. Preventative maintenance is better then forking out many big dollars because of some know alls stupidity, who claims to be an expert - and there are plenty of them around who are just willing to take your money off you. Contact me again if I can be of assistance. At least my car is running 100 % perfectly on gas and you cant tell if its on gas or petrol.
Its had its first free 1500 Km service last week and some minor adjustments were carried out after allowing the sytem to bed itself in.

thanks V64runner you have hit the nail on the head. If you can supply any further info ie photos, backfire valve make and model etc it would be greatly appreciated. i have emailed Sprint for more details also. My email address is kcandco@internode.on.net
I have a mazda on gas also and had one backfire so dont want it to happen again, or at least if it does i want some protection so i wont be stuck in the sticks with no parts. The last backfire was caused when father in law degreased engine and hosed down. Sorry for taking so long to reply... I need more hours in my day

regards Kc

thanks wrexed03. this helps heaps. i am now getting some good ideas on what to do. What did you do for your conversion and what model is it on. Also what type of manual do you recommend? I have seen the Haynes one and have read about one available from overseas. Are there any on the net?

regards Kc

Thanks wrexed03 sorry to hear the news... read similar post on pajvic site. I still cant comprehend that these businesses are fitting these things without giving proper advice. Yes it looks like injection IS the only way to go. Are you considering fitting a backfire protection device as suggested in previous reply or is this there absolutely no chance of a backfire with injection. I would not think a backfire possible with injection system.... but may be wrong.

regards Kc