Pres­sure’s on to get it right

NT News - Motoring - - CARS GUIDE -

Q: We have had to put new tyres on our Ford Ter­ri­tory af­ter four years. The tyres show they should be in­flated to 40 psi, but the car’s man­ual says 32 psi for reg­u­lar un­loaded driv­ing for a Ter­ri­tory. Should I fol­low the tyre or the car guide? KC, email. A: Fol­low the plac­ard on the car. The pres­sure shown on the tyre side­wall is the max­i­mum in­fla­tion pres­sure it can with­stand — it has got noth­ing to do with the pres­sure you should run on your car.

Q: I re­cently had an ex­ter­nal trans­mis­sion cooler fit­ted to my non-turbo au­to­matic BA Fal­con ute and I reckon the power has in­creased by about 10 per cent. Could this be true or is it just wish­ful think­ing? The me­chanic who fit­ted it could not con­firm or deny it with­out do­ing a dyno test, which I am­not keen to do. Geoffrey Col­lits, email. A: There’s no rea­son to be­lieve adding a cooler would in­crease the per­for­mance. I wouldn’t bother wast­ing your money on a test.

Q: The Ford Fal­con 2008 se­ries

Rough run­ning and back­fir­ing are com­mon is­sues with LPG cars, par­tic­u­larly those run­ning the old tech­nol­ogy

III straight gas wagon I re­cently bought has been idling rough when stopped at the lights when in ‘‘drive’’. My Ford dealer said the air in­take was cracked and re­placed it, but it still ran roughly and be­gan to back­fire when start­ing. I took it back a sec­ond time and they said it was the in­let man­i­fold gas­ket and bat­tery, and changed both, but it wasn’t fixed. I can­not af­ford to lose my car for an­other whole day be­cause I need it for work six days a week. Any ideas? Craig. A: Rough run­ning and back­fir­ing are com­mon is­sues with LPG cars, par­tic­u­larly those run­ning the old tech­nol­ogy as your old Fal­con is run­ning. It’s usu­ally a prob­lem with the ig­ni­tion sys­tem, such as spark plugs or spark plug leads. I would re­place them.

Q: I be­gan ex­pe­ri­enc­ing a vi­bra­tion through the steer­ing wheel of my 2010 Ford Fi­esta Zetec soon af­ter buy­ing it. My Ford dealer ad­vised me that all four wheels were buck­led and that as a re­sult my car was un­road­wor­thy and that all four wheels needed to be re­placed. They also ad­vised me to re­place the tyres. I was ad­vised that the sporty-type of car and the al­loy wheels make it sus­cep­ti­ble to non-free­way roads.

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