Smoke gets bad on ac­cel­er­a­tion

NT News - Motoring - - CARS GUIDE -

Q: My 2010 Mit­subishi Tri­ton GLX-R blows lots of black smoke. Some­one told me it blew lots more when I ac­cel­er­ated af­ter stop­ping. What could be caus­ing it? Steve, e-mail. A: You don’t say if the engine is a petrol or diesel but I’m guess­ing it’s a diesel.

If that’s the case, it’s likely to be ex­ces­sive fuel, which could be an in­jec­tor prob­lem or a fuel pump is­sue. Get it to a diesel me­chanic who should be able to sort it out.

Q: Once or twice a week my 2010 Hyundai ix35 seems to mo­men­tar­ily drop out of gear when ac­cel­er­at­ing from a stop.

It seems to be near the 2-3 shift point, and the engine jumps at least 2000rpm be­fore grab­bing drive again. My dealer has been try­ing to solve the prob­lem with­out suc­cess as they can­not re-cre­ate the event.

I’m con­cerned that pick­ing up drive again from an over­speed event will even­tu­ally dam­age the gear­box. What should I do?

Ray Tier­ney, e-mail.

A: It’s al­ways hard to find the cause of a prob­lem you can’t wit­ness first-hand so the only thing you can do at this stage is per­sist with the dealer and hope they can track it down for you.

In the mean­time, note ev­ery in­stance of the is­sue, record­ing time, place, cir­cum­stances, engine speed and gears so you can give the dealer the max­i­mum amount of in­for­ma­tion pos­si­ble.

Q: My 2008 Nis­san Navara STX needed in­jec­tors at 70,000km and it was done un­der war­ranty.

They needed re­plac­ing again at 104,000km but this time, Nis­san wanted the in­jec­tors sent to an in­de­pen­dent com­pany for as­sess­ment.

It was found that three in­jec­tors had ex­ces­sive leak­age and all needed to be re­placed. Nis­san of­fered to pay for half the in­jec­tors, which was $1354.64.

That left me to pay the re­main­der, in­clud­ing the in­de­pen­dent test­ing at $2500. I think this is un­fair and I am pur­su­ing Nis­san for the full pay­ment.

Are in­jec­tor faults com­mon­with Nis­san? Kevin Maxwell, Car­rum Downs, Vic. A: Worn in­jec­tors are quite com­mon on most of to­day’s diesel en­gines what­ever the make of the ve­hi­cle.

That Nis­san has al­ready re­placed some in­jec­tors un­der war­ranty on your ve­hi­cle and has of­fered to pay half for the sec­ond set sug­gests there is an is­sue.

I would sug­gest you talk to a diesel me­chanic who could give you more de­tailed in­for­ma­tion about the is­sue.

Q: I’ve read some sto­ries where Grand Chero­kee own­ers com­plained about a clunk in the gear­box.

Do you know if they were re­fer­ring more to the shift­ing of gears be­ing hard?

From new, my Jeep when stop­ping for a small pe­riod say af­ter fuel stops, once tak­ing off again it would al­ways clunk or change hard through sec­ond to third. Just for the first change af­ter take­off, then it was fine.

At the 12,000km ser­vice they couldn’t fault it.

At the 24,000km ser­vice they told me the oil level was low and that was the cause. They were cor­rect, it did some­what fix it but I still get a clunk when I ac­cel­er­ate and if I back off com­ing to a stop it would still change up and clunk into a gear.

Some­times even un­der nor­mal driv­ing/ac­cel­er­a­tion it would do the same.

The Jeep has now done 50,000km in 18 months and it’s still there. Do you think it’s the is­sue oth­ers have com­plained about? Joe, e-mail. A: It’s pos­si­ble but it’s hard to say for sure. We’ve con­tacted Chrysler about an­other ve­hi­cle that’s ex­hibit­ing the prob­lem, and we’re wait­ing for their re­ply.

We might be able to give some idea of the cause once we hear from them.

Q: I have had to re­place a num­ber of the ig­ni­tion coils on­myVZ Com­modore wagon over the last six months. The ‘‘check power train’’ warn­ing alert ac­ti­vates and the car starts run­ning roughly.

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