Jackeroo converting to gas.

Submitted: Thursday, Jul 21, 2005 at 12:23
ThreadID: 24930 Views:3194 Replies:7 FollowUps:11
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Has anyone any experience with this - have read there are problems. any info would be appreciated (with the cost of petrol going to $1.30 ltre have been told by a reliable source!!!!) Thank you
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Reply By: robsjack - Thursday, Jul 21, 2005 at 13:17

Thursday, Jul 21, 2005 at 13:17
Have 2000 model SE Jack which I converted to dual fuel late last year.
Overall I'm very happy with the end result allthough I've had a few minor annoyances and great difficulty in finding mechanics who know how to tune them properly.

Mine runs very well on gas and I love the current pirce here for gas .41c/ltr (even better with the Woolies .04c discount). 75litr gas tank (55ltrs usable) gets me around 300km (round town). This works out to be around an economy of 18l/100km @ 0.41c/l = approx 7c/km. On petrol I get around 15l/100km @ $1.20/l = approx 18c/km.

My gas tank replaced my petrol tank and I opted for a 55ltr petrol tank mounted underneath so no lost of luggage space and my wife much happier without a gas tank inside the vehicle. My setup cost me just over $2.5k (the aux petrol tank added $400 to the original price). At current prices it will take less than a year to pay for the conversion.
AnswerID: 121435

Follow Up By: dennies - Thursday, Jul 21, 2005 at 17:06

Thursday, Jul 21, 2005 at 17:06
I have been told that there are problems - how many ks have you done since conversion - are you in Melbourne.D

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Follow Up By: robsjack - Friday, Jul 22, 2005 at 12:22

Friday, Jul 22, 2005 at 12:22
Just covered over 20,000km with the conversion.
Apart from a wire dropping off a solenoid (which had me thinking I was loosing petrol) actually I was running on petrol even though the gas controller was telling me I was on gas the only other issues I've had are purely tuning related (ie. wont' start on gas when cold, flat spots, power dropping off at high revs).
I finally found a good gas mechanic and when it's tuned right it goes great. There's barely any difference when on gas or petrol.
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Reply By: Boc1971 - Thursday, Jul 21, 2005 at 13:48

Thursday, Jul 21, 2005 at 13:48
Just be happy we are not yet paying Europe prices -- i have a german back packer staying with me right now , and she tells me they are paying almost $2.50 a Litre

im guessing this time next year , we may be paying the same

AnswerID: 121441

Follow Up By: See You - Thursday, Jul 21, 2005 at 18:53

Thursday, Jul 21, 2005 at 18:53
In 1988 Sweden unleaded was $3.50 Aus per litre. I would not like to run a car up there in 2005.
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Reply By: Leroy - Thursday, Jul 21, 2005 at 16:39

Thursday, Jul 21, 2005 at 16:39
I enquired at a number of gas conversion places about putting a V6 Rodeo on gas before I purchased one and everyplace including an RACV bloke said don't buy a Rodeo if I intend putting it on gas. They reckon you'll be recoing the heads as little as 40k after the conversion. That being said the Jack has basically the same donk!

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Reply By: Gerhardp1 - Thursday, Jul 21, 2005 at 17:57

Thursday, Jul 21, 2005 at 17:57
As far as I know the Jackaroo 3.5 litre engine is not LPG compatible, as I checked this when I was thinking of converting my 98 Monterey when I bought it new.

The Rodeo 3.2 litre of the time had a different inlet manifold and may well have different heads. I think from 2000 on the Rodeo 3.2 is gas compatible. Now they are 3.5 but still with the different inlet manifold, and maybe are also gas compatible.

When I was going to convert the Monterey, the gas shop dude said the conversion will cause problems if a flashlube upper lubricant injector is not used. I didn't buy it in relation the the new 3.5 engine, because he couldn't have had any experience with that engine - he could only know anything about the 3.2 that precedid it.

So it remained unconverted, and I have only ever seen one 98 on Jackaroo on gas driving around.


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Follow Up By: robsjack - Friday, Jul 22, 2005 at 12:25

Friday, Jul 22, 2005 at 12:25
I requested the flash-lube system be installed when I got the conversion done but several mechanics have since told me that it's not effective. flash lube is currently disconnected.
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Follow Up By: robsjack - Friday, Jul 22, 2005 at 12:30

Friday, Jul 22, 2005 at 12:30
The place that did my conversion had already done 12 jacks in the past 2 years which is the reason I went with that particular place.
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Reply By: awill4x4 - Thursday, Jul 21, 2005 at 21:31

Thursday, Jul 21, 2005 at 21:31
The LPG installers next door to us at work (Carrum Downs Melbourne) have recently installed a couple of gas vapour injection kits on 3.5 litre Rodeo's with excellent results. This is the next era for LPG conversions where the gas is injected directly into each port just like your petrol is with its own dedicated set of injectors installed into the inlet manifold.
It runs its own computer which is laptop progammable if required , the power and economy are only a few percent different to that of petrol.
A very impressive install from what I've seen, this kit is being evaluated by GMH as a factory option and is produced by Parnell LPG here in Melbourne.
Regards Andrew.
AnswerID: 121513

Follow Up By: Leroy - Friday, Jul 22, 2005 at 09:44

Friday, Jul 22, 2005 at 09:44
I remeber seeing this type of system as a prototype on an EA or EB falcon in a documentary in the early 90's . It's taken a long time for it to get on the market!

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Follow Up By: awill4x4 - Friday, Jul 22, 2005 at 21:05

Friday, Jul 22, 2005 at 21:05
I was wrong about it being a "Parnell LPG kit" it's actually an Impco gas vapour injection kit built for Holden and supplied by Victorian Autogas here in Melb. The guys next door use Vic Autogas as a supplier and fit this sytem to new Holden Rodeo's prior to the customer picking the car up from the dealer.
Apparently components are available to retro fit to a number of fuel injected vehicles and are then progammed with the laptop. (the rodeo's are pre-programmed) It costs about an extra $1000-$1200 to buy this kit versus a standard Impco system.
They must be doing a few systems for these now as the new Toyota Hiace (the one that looks like a block of flats) from Vic Autogas had a sign on the side "I'm laughing, I'm on sequential injection LPG"
I've been told there doing a kit for the Gen 3 V8's as well, now that would make a nice conversion.
Regards Andrew.
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Follow Up By: Member - Bradley- Saturday, Jul 23, 2005 at 16:50

Saturday, Jul 23, 2005 at 16:50
Andrew, does this system still use a standard style convertor ? or is it fed as a liquid to the injectors?

And do you know if they suffer the odd afm destroying backfire like earlier gas systems ? I assume being ecu controlled they wouldn't.

Thanks champ,
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Follow Up By: awill4x4 - Saturday, Jul 23, 2005 at 21:12

Saturday, Jul 23, 2005 at 21:12
Brad, from what I saw it is a completely different style of convertor but it still converts from liquid to gas hence "gas vapour injection" The one on the Rodeo has the gas line run through a pair of filters after the convertor so any "junk" which can occur at times is filtered and it can't block the injectors. A very useful addition in my opinion as I have been the victim of a bad batch of gas residue fouling the mixer in the past. There is no mixer in the inlet tract so air flow isn't compromised as it is with normal LPG conversions. Serious backfires are usually caused by the fact the whole inlet tract is filled with LPG/air, but this new system only has gas in each inlet port injected when it's needed on the induction stroke so backfires should be a thing of the past. The one thing I didn't like on the Rodeo install was the fact the gas computer was located in the engine bay up near the front of the car and in a 4x4 situation could possibly be a problem with water crossings, but these Rodeo's I saw were 4x2's anyway so it's not a problem for them.
Regards Andrew.
FollowupID: 376941

Follow Up By: Member - Bradley- Monday, Jul 25, 2005 at 17:05

Monday, Jul 25, 2005 at 17:05
Thanks Andrew, geez i like the idea of a new style convertor with filters, that will solve a huge amount of dramas right there. I'm with you, never liked the idea of ecu's in the engine bay, let alone on top of the manifold like the v6 rodeos. Might have to look at it as an option on the jack, but i think i will be strugling to put that much cash up front.

cheers mate, brad
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Reply By: Sarg - Thursday, Jul 21, 2005 at 22:12

Thursday, Jul 21, 2005 at 22:12
Anything that runs on unleaded will run on gas without problems. Been doing this for the last ten years & 100,000 K''s. Fitted a Flashlube setup at the time of installation so cannot say whether this is the answer or not. Wouldn't hurt to fit one anyway as they cost bugger all considering the cost of the conversion.
AnswerID: 121527

Follow Up By: Leroy - Friday, Jul 22, 2005 at 09:41

Friday, Jul 22, 2005 at 09:41
I don't necessarily agree. A mate who is a motor mech had a mid 90's Rodeo on gas and the thing kept flogging out valve guides. All he could put it down to was running on gas was too hot for the combustion chambers and the lube for the guides got vapourise for want of a better description so they were running 'dry'.

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Reply By: robsjack - Friday, Aug 05, 2005 at 12:49

Friday, Aug 05, 2005 at 12:49
Just a follow up with the niggles I've had with my Jack since the conversion.
Mechanic finally replaced the gas 'stepper motor' which was intermittantly failing under warranty and everything is running perfectly. Starts first go when it's cold in the morning and runs like a dream.
AnswerID: 123953

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