Un­leaded guz­zler on gas

Herald Sun - Motoring - - Ask Smithy -

My 1999 3.2-litre V6 Rodeo has been run­ning nicely on LPG for three years but it is now us­ing about half a tank of petrol per two tanks of gas. I have pulled the petrol pump fuse but that makes no dif­fer­ence. I no­tice the in­jec­tors are run­ning when it is on gas, but I don’t know if this was pre­vi­ously the case. If I put a so­le­noid valve in the petrol line the in­jec­tors would be run­ning dry, which might not be good for them. No­body seems to know what to do about this. Where do you sug­gest I start look­ing at this prob­lem?

Phill Higgins, email The Rodeo has a known is­sue that can in­crease the petrol con­sump­tion while op­er­at­ing on LPG, as you de­scribe. You need to take it to a rep­utable LPG me­chanic, prefer­ably one who knows the par­tic­u­lar sys­tem fit­ted to your ve­hi­cle. DOES NOT COM­PUTE MY VZ Com­modore is re­ally tough to restart if left sit­ting for be­tween 15 min­utes and an hour and the pow­er­train warn­ing light comes on. If I turn it off and then on again it starts nor­mally. It’s done this for three years now and no one can tell me why.

Kim­buckby, email Turn­ing the car off and on again re­boots the com­puter, so it sounds as if it could be a fault with the com­puter or one of the sen­sors feed­ing in­for­ma­tion to it. Have a me­chanic check the sys­tem for faults. RUN, DON’T LIMP For many years now my 2007 Nis­san Pathfinder has been go­ing into limp-home mode. It has not yet cov­ered 110,000km and the fault has oc­curred eight times in the last 10,000km. It’s very dan­ger­ous, par­tic­u­larly when it hap­pens while over­tak­ing. Nis­san has not is­sued a re­call to fix it which leads me to won­der whether other man­u­fac­tur­ers re­call cars with dan­ger­ous com­puter sys­tems.

Frank Hor­gan, email Re­calls are mostly to fix po­ten­tially dan­ger­ous prob­lems and all car mak­ers have them from time to time. I would say that your car has a par­tic­u­lar prob­lem with its com­puter sys­tem and I am amazed that you have put up with it for ‘‘ many years’’. Take it im­me­di­ately to a Nis­san dealer or to an independent Nis­san spe­cial­ist to iden­tify the prob­lem and fix it. CLUTCHINGSTRAWS A friend told me he was hav­ing trou­ble chang­ing gears

Likes a drink: The Rodeo has a known is­sue with slurp­ing petrol while on gas

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