aconis

This ECUs on SC400 are becoming quite problematic this days due to its age and it cost fortune. Friend of mine couldn't get the ECU issue sorted and he had switched to aftermarket ECU as well as refreshed the ECU harness, especially the part around the engine. So he is quite happy with a results as well as he got couple additional ponies from proper tune. Needles to say he get rid of MAF sensor in favour of MAP sensor.

20k, no typo here. The reason is the fuel quality and my own wish to do so. Finally air gap was outside the factory tolerance - central electrode start burning down. The car is also use to work on LPG. Spark plugs installed were as per catalogue: 90919-01210 with Denso SK20R11 inside.

Incredible story: I went to replace front shocks and spark plugs (just because it was 20k. miles on them) and after the job done car start jerking 2-4 times back and force on every shift up change. Everything was check twice, even intake manifold remove to make sure the gasket didn't get jammed or so but nothing. All ignition coil checked with oscilloscope and found to be ok. Had to change the ATF and filter but it gave zero result. RX300 AWD 200k.miles. Before that ATF was changed every 30k miles and transmission was working super soft. No diagnostic codes at all! Any thoughts?

It may be not only battery issue if it keep cranking the motor but it won't fire up.