Landcruiser on LPG

I have a 2004 Sahara Landcruiser on Duel Fuel. This is the third one I have had, all on LPG and I have a recent story to tell.

Have done about 70,000klm with LPG in this vehicle, Odometer is at 104,000.

Last week towed a van 600klm from Syd to Albury and the engine Blew Up. Cracked a ConRod and punched a hole in the side of the block. $10,000 and a second hand engine later I am licking my wounds but realised something for all those who have GAS or are thinking of getting it.

When the LPG is installed, some of the enine management is bypassed. This means that there is apparently no control over the revs of the vehicle and so Toyota have blamed the problem on overrevving. (the car was 5 weeks out of extra care warrantee).

After reflecting on all the Klm's I have done, I remembered that when towing and on cruise control, when going uphill the engine revs very high and then the cruise control releases. I wonder if this is what they mean?

I have now disconneted the gas while the engine is still in warrantee and the behaviour of the engine under the same conditions is very different so perhaps Toyota have a case here.

What dissapoints me is the Gas installer does not mention this possibility when installing the system otherwise one could allow for this and react accordingly. Looking back you may say that I should have reacted to the high revs however it was not RedLining and I was under the impression that the Car was doing what it was supposed too since it was on cruise control.

Can anyone give feedback on this? Toyota have said they have only seen this damage three times in landcruisers and all three had Gas Fitted.