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Ping pangs

I NEED some advice on my wife's Hyundai Excel, which we bought new in 1999. We were happy to begin with, until last year when we heard a pinging. I took it to the dealer and from that day we've been trying various tests without success. I was asked to change the fuel brand and to use high-octane fuel. When we started using PULP, the noise disappeared, but this car is not meant to use PULP, which means there is a problem in the motor. The car has done 70,000km. I take it for a spin on the freeway every three weeks and I know a little about engines. The Hyundai dealer says it's excessive carbon build-up on the head due to short running, which I am not ready to accept because my wife does at least 20km one way and normal weekend running with my daughter's activities. Hyundai has charged me for this job, even though they haven't fixed the problem. What should I do next before the warranty expires?

ACCORDING to the trade, the Excel doesn't have a problem with pinging. The advice about using a higher-octane fuel to check for the source is correct. As the pinging wasn't present when PULP was used, it suggests you have a problem with the fuel you're using. Try switching brands and buying from an outlet with a high volume of sales. It's possible you've had some poor-quality fuel. If that doesn't work and you aren't satisfied with what your dealer has done, contact Hyundai's local office and express your concerns directly.

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Complete guide to Hyundai Excel 1999
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