Hi scotty,

First of all i would like to take this opportunity to thank you for all the great information you share to the world.

I am Faiz Hashmi, an independent garage and auto programming workshop owner in United Arab Emirates. I would like to straight jump into my question and here it is:

  • I drive a 2013 LEXUS LS460 American spec car in Dubai's hot weather and recently came across a strange issue with my car. My car started overheating on acceleration like in seconds in a pattern like 90-91-94-96 degree Celsius and then stats on lifting the pedal n cools down gradually. I went onto first change the radiator to a double piped radiator, no help, changed thermostat, no help, changed fan, no help, changed fan ecu, no help, instead of changing headgasket, i replaced it with a very good 2014 engine, still no help, n m soooo freaked out. Now the car runs with a washed radiator with all pores open, an engine fan which runs constantly and an extra condensor fan and good antifreeze n the situation remains driveable but not on the hill or full throttle. No error codes in engine ecu or elsewhere, all electrical things perfect. Temperature fluctuates between 90-100 if i dont go to hill or if i dont hit the pedal hard. Need your advice. By the way, i changed engine coolant temp sensor too. No difference.

Thanks in advance.

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ScottyKilmer
ScottyKilmer

Editor

well, you put in a used engine, no saying what shape it was in in hot climates like yours. But I would have everything tested from fuel injection rich or leanness to the possibility of a weak fuel pump causing lean running

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