Jackaroo performance problem

I was told to steer clear of gas when I bought my Rodeo as I was thinking of converting it to gas. My mechanic said put up with the fuel ecconomy or don't buy it! But this doesnt help you now. What does the ECU do when the vehicle is running on gas? I'm sure this will only have a bearing if you are running on Petrol. I'd check to see how the gas is plumbed in as it may be restricting air flow. I know you said it appears lean when trying to start but a rich mixture may give you the same symptoms.

Leroy

Afternoon Jackass

I have a duel fueled vehicle (not a 4WD) and was told at the conversion stage that I had to run spark plugs one (1) temp range cooler, with a gap 20% smaller.

I did this and have had no problems at all ,other than overall power wise it wouldn't pull the skin off a custard, but is very economical.

Ken Robinson

3.5 Jacks have a problem with fuel pumps,they continue to run but poor power and can also bring check engine light on, however this does not explain the gas problem, otherwise would be looking at the cat converter to make sure that it has not broken up causing restriction or melted the internal monolith. Could be one of many things however these 2 are reasonably common.

Greg

I know this doesn't answer the question, but I have heard that converting the 3.5 to LPG is not a good idea.

Apparently the head castings are too thin to cope with the extra heat of LPG and can crack. It is probably worthwhile trying Lucy's suggestion of a cooler spark plug range.

My old man has a 95 se on gas & had the same problem. Frustrated the hell out of him. He had taken it to gas specialist, holden, & other mechanics & replaced various parts including power pack, spark plugs, & leads. ECU checked out ok. None of these answered the problem.

I assume you are using the long range tank as a petrol tank, check your carbon canister & see if any petrol is coming back through your overflow as his was. If so remove valve from inside petrol cap as it causes to much back pressure in your fuel tank. After removing this the problem has ceased, but found that you cannot use all the fuel in your petrol tank due to no pressure. You will only be able to use about 35ltrs as there is no baffles in the tank & you find the fuel sloshing around. He has travelled 8000kms since & had no trouble.

Hope this helps you.

Cheers

Jackablue

Any outcome ?

It took a pair of pliers & about 30 seconds to rip the round plastic valve & the diaphragm out of the fuel cap. He has also told me that around town he is getting down to the last 10ltrs in the tank & is very happy now. He thinks that when he was towing the fuel would slosh around more due to the caravan push,pull, up & down action making it harder for the fuel to be extracted.

At most it will cost you a new fuel cap.

Let us know how you go.

Cheers

Jackablue