rx4u Posted March 4, 2013 Share Posted March 4, 2013 Just picked up a 2008 RX400h and noticed that when crusing on the freeway around 70 to 80 mph, the vehicle begins to pulsate/surge. There is no noticeable decrease or increase of speed, just a subtle pulsation as if I were driving against a strong headwind. Is this a known issue or just a byproduct of the hybrid technology? I have four days left to return it or switch it out and want to be sure before this time period expires. Loving everything esle about the truck. Tremendous vehicle! Quote Link to comment Share on other sites More sharing options...
BobBass Posted March 4, 2013 Share Posted March 4, 2013 Can't say that I've noticed this on mine, but it's been awhile since I've run it on cruise at that speed. I assume you have it on cruise control when this is happening and that for the most part the gas engine is running. Sounds like a drive with a tech might be in order if you can find a place to recreate that near the dealership. Quote Link to comment Share on other sites More sharing options...
rx4u Posted March 4, 2013 Author Share Posted March 4, 2013 My apologies. When I wrote cruisin, I meant just driving, not on actual cruise control. Quote Link to comment Share on other sites More sharing options...
James Horning Posted March 5, 2013 Share Posted March 5, 2013 Have your dealer check for available reprogramming , there is a TSB that applies to this condition, exactly as you have complained . Quote Link to comment Share on other sites More sharing options...
RX400h Posted March 5, 2013 Share Posted March 5, 2013 Have your dealer check for available reprogramming , there is a TSB that applies to this condition, exactly as you have complained . I agree; specifically ask to see all tsbs and check to see if all recalled were performed, as well. Quote Link to comment Share on other sites More sharing options...
katzjamr Posted March 5, 2013 Share Posted March 5, 2013 this was happening at 40mph also, prior to the tsb, and the reprogramming corrected it, also have them do an isc reset, if the updates at the dealer have not been done, there is a good chance this needs attention too. Quote Link to comment Share on other sites More sharing options...
rx4u Posted March 5, 2013 Author Share Posted March 5, 2013 Thanks all. I appreciate the insight and guidance. I will take it into the dealership to have it checked and report back my findings. Again, thanks a ton. Quote Link to comment Share on other sites More sharing options...
Klug Posted October 17, 2016 Share Posted October 17, 2016 Hello, reviving an old thread, sorry about this 8-/ I own a 2006 euro spec RX400h with a bit more than 255'000 on the clock (that 160'000 miles). I experienced this yesterday (both "town speed" and "highway speed"), it never occurred before. I was suspecting the gazoline I put in just before leaving on my trip then found this thread and others on the same subject. The tank is almost empty so I'll fill it with "better" gas tomorrow and do some tests. If issue still occurs, do you know how to check if the TSB were properly applied (this car has not seen a Lexus/Toyota shop for two years) and if there's a way of applying them on my own (with Techsteam)? Quote Link to comment Share on other sites More sharing options...
lenore Posted October 20, 2016 Share Posted October 20, 2016 The TSB is EG013-07 Quote Link to comment Share on other sites More sharing options...
Klug Posted October 20, 2016 Share Posted October 20, 2016 I have the TSB, I found it in another thread. Thank you anyway 8) My question is about applying the new firmware without going to a Lexus/Toyota shop (I don't trust them. At all. At least the one less than 100 miles from here). Reading the TSB it appears that, even you get the firmware (how?) you need the Hybrid Battery Charger/Tester plugged in... I wonder if this is really the case or it's only a way to get owners to go in Lexus/Toyota shops. Quote Link to comment Share on other sites More sharing options...
lenore Posted October 20, 2016 Share Posted October 20, 2016 I am afraid these firmware uploads are very proprioritory. I doubt that you would be able to get them outside of Toyota or Lexus dealerships. Quote Link to comment Share on other sites More sharing options...
Klug Posted October 24, 2016 Share Posted October 24, 2016 Quick review about this: refilling the tank fixed the issue... There might have been something bad (bad dosing? not something that cloaked the gas filter anyway) in previous tank. Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.