gmv93

I am using stock plugs which are stated on users manual but problem is, i am using LPG instead of Gasoline and this requires the tighter gap at tip. Any information? LPG has higher octane rating when compared to gasoline(actually it is not called octane for LPG but it is not important)

What is stock gap for gasoline? Which alternative brands can be used with 4.0 engine? it is 97 ZJ 4.0.

Gee oh Dee

I wish I could help, but I can't.

I'm curious, though, did you do the conversion yourself?

shadowlm15

mite be stupid but whats LPG?

dukie564

stock gap is .035.

There are special plugs you can buy for the petrol/LPG combination - do a search online, pretty sure they are manufacturer specific (non-standard)

Gee oh Dee

Natural gas or propane.

gmv93

LPG is liquid petrolium gas(actually liquid propane gas). my 4.0 operates on LPG. it is cheaper than gasoline.

if it is 0.035 which makes almost 0.9 mm, i need to find different spark plugs.

another question, do 4.0 have knock sensors for each cylinders?

freegdr

no on the knock sensors

EVcherokee

I think only the Renix 4.0's have knock sensors and theres only one under the intake/ exhaust manifolds on the drivers side. It uses a pezo crystal to create a pulse when detonation occurs.

Your running LP!? could you take a look at my thread and maybe give your 2 cents? I'm looking at doing a petrol/LP setup and could use some input..

https://www.cherokeeforum.com/f2/run...00-carb-64773/

truckntractorhick

yea i wanna see this!

mwdouglas

i want to know the lpg conversion more like how you did it and how expensive was it i have a "90 renix motor and was tossing the idea of lpg around but dont know anything about it

brutalxj

I too need more info. I have always wanted to run LP. More power less cost less moving parts and can be used at more extream angles. Haven't looked into it yet but now you make me want to. I have 2, 4.0 H.O.s a 95 and 99 please do a write up and give me a link. I'm tearing down the 95 soon and would love to add this to the list of mods.

djb383

http://start.toshiba.com/search/inde...ane+conversion

Lots of reading/info.

mwdouglas

can you post pics of your set up please

gmv93

dear friends, i will take photos and try to introduce you a LPG system.
It is better to open a new topic for that.

thanks for answer. i will check your thread.

Gee oh Dee

Still wondering if you did the conversion yourself...

If you do start another thread please post a link here so its easier for others to follow!!