Passing on gas
For months after I converted my Commodore to run on LPG using an injection system, all went well. Then it began to run roughly. My installer diagnosed blocked injectors due to contaminated LPG and recommended replacing them. After the work was done, at a cost of $1200, the problem appeared to be fixed but it surfaced again after a little time. Once more the diagnosis was blocked injectors due to contaminated gas, although I had switched to a different LPG outlet as recommended. Same story: the blocked injectors were replaced, the car ran well for a short time, the rough running returned and the installer cited blocked injectors due to contaminated LPG. I have now blown any of the savings I hoped to make by converting to LPG in the first place. What can I do?
We checked around and found there are reports of fuel quality issues resulting in injectors being blocked. The chief cause is thought to be contaminants in the gas leaching plasticisers from flexible rubber hoses installed on some LPG vehicles, and this material migrates to the injectors. The recommendation we were given is to inspect the fuel delivery lines and, if they are rubber, check their extractability rating. If the rating is not near zero, then have them replaced with either copper lines or flexible lines with zero extractability. GOOD DAI I contacted you about the poor radio reception in my Hyundai ix35 and you asked Hyundai to investigate it. Well, it’s hard to believe but after 12 months the AM radio finally works, to Hyundai’s credit. They replaced everything, including the radio, but in the end it was fixed by fitting a bigger aerial, which is what I wanted in the first place. So I now have an ix35 with a Commodore aerial and it works on AM. Thanks for Carsguide’s help as well.
Ian Davis, email Good news. We thank Hyundai, too, for following up and fixing the problem. PULP FACTS My Honda City has ‘‘pinged’’ under load from the day I bought it two years ago. The service people will not even acknowledge the pinging and seem totally disinterested. How can I have my car serviced by a non-Honda company and not affect my warranty?
RonPort, email You don’t say what fuel you have been running it on but if you’ve been using regular unleaded try a higher-octane rating fuel, such as 95 PULP or even higher 98, and see if the pinging goes away. You can have your car serviced by any qualified mechanic without affecting the warranty, as long as it is done according to Honda’s recommendation.
Blocked: Converting a Commodore to LPG has upped the owner’s running costs — contaminants in the gas clog the injectors