1st Post...help...judder from Electric to Electric+Engine
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Driver School Candidate
Joined: Apr 2022
Posts: 1
Likes: 0
From: UK
1st Post...help...judder from Electric to Electric+Engine
Hi there
My first post.
My relatively new to me RX400-H which is a 2009 vehicle with 86,000 and full Lexus Service History has recently started juddering/stutters when you accelerate with a light throttle from pure electric to running with electric+engine. It literally just judders as the engine kicks in and then clears and only when you accelerate on a light throttle at very low speeds, ie when you are using pure electric to move slowly in traffic and when slowly building up speed. The judder can be very noticeable at times and on other occasions its very slight. If you accelerate hard, it switches between electric to electric+engine with no judder.
If you are cruising and come off the accelerator and coast and then go back onto the accelerator and use both electric and engine the problem never occurs....its only at very low speeds.
I spoke to a Lexus specialist and was looking to book the car in with them but they didn't seem that interested, but they did mention that it could be Coil Packs or Flex Plate in the Gearbox.
Re Coil Packs, as there is no Engine Management Light on its hard to diagnose a failing Coil Pack...or at least I think its difficult to diagnose....i could be wrong.
2ndly the Flex Pate....not sure on this one, as I'm sure if it was a Flex Plate it would cause Judders at all speeds and be making a rattling sound from the gearbox....anybody have any experience with failing Flex Plates?
Look forward to getting some thoughts on this Judder problem
My first post.
My relatively new to me RX400-H which is a 2009 vehicle with 86,000 and full Lexus Service History has recently started juddering/stutters when you accelerate with a light throttle from pure electric to running with electric+engine. It literally just judders as the engine kicks in and then clears and only when you accelerate on a light throttle at very low speeds, ie when you are using pure electric to move slowly in traffic and when slowly building up speed. The judder can be very noticeable at times and on other occasions its very slight. If you accelerate hard, it switches between electric to electric+engine with no judder.
If you are cruising and come off the accelerator and coast and then go back onto the accelerator and use both electric and engine the problem never occurs....its only at very low speeds.
I spoke to a Lexus specialist and was looking to book the car in with them but they didn't seem that interested, but they did mention that it could be Coil Packs or Flex Plate in the Gearbox.
Re Coil Packs, as there is no Engine Management Light on its hard to diagnose a failing Coil Pack...or at least I think its difficult to diagnose....i could be wrong.
2ndly the Flex Pate....not sure on this one, as I'm sure if it was a Flex Plate it would cause Judders at all speeds and be making a rattling sound from the gearbox....anybody have any experience with failing Flex Plates?
Look forward to getting some thoughts on this Judder problem
Advanced
Joined: May 2016
Posts: 557
Likes: 53
From: Ontario
I think that's just the way it goes. If you want to experience real shudder, start it up in the driveway, don't go anywhere, and turn the heat on after a couple of mins.
Last edited by daddiojigg; Apr 8, 2022 at 03:28 AM. Reason: content
10th Gear
Joined: Jul 2020
Posts: 10
Likes: 3
From: Missouri
Hi there
My first post.
My relatively new to me RX400-H which is a 2009 vehicle with 86,000 and full Lexus Service History has recently started juddering/stutters when you accelerate with a light throttle from pure electric to running with electric+engine. It literally just judders as the engine kicks in and then clears and only when you accelerate on a light throttle at very low speeds, ie when you are using pure electric to move slowly in traffic and when slowly building up speed. The judder can be very noticeable at times and on other occasions its very slight. If you accelerate hard, it switches between electric to electric+engine with no judder.
If you are cruising and come off the accelerator and coast and then go back onto the accelerator and use both electric and engine the problem never occurs....its only at very low speeds.
I spoke to a Lexus specialist and was looking to book the car in with them but they didn't seem that interested, but they did mention that it could be Coil Packs or Flex Plate in the Gearbox.
Re Coil Packs, as there is no Engine Management Light on its hard to diagnose a failing Coil Pack...or at least I think its difficult to diagnose....i could be wrong.
2ndly the Flex Pate....not sure on this one, as I'm sure if it was a Flex Plate it would cause Judders at all speeds and be making a rattling sound from the gearbox....anybody have any experience with failing Flex Plates?
Look forward to getting some thoughts on this Judder problem
My first post.
My relatively new to me RX400-H which is a 2009 vehicle with 86,000 and full Lexus Service History has recently started juddering/stutters when you accelerate with a light throttle from pure electric to running with electric+engine. It literally just judders as the engine kicks in and then clears and only when you accelerate on a light throttle at very low speeds, ie when you are using pure electric to move slowly in traffic and when slowly building up speed. The judder can be very noticeable at times and on other occasions its very slight. If you accelerate hard, it switches between electric to electric+engine with no judder.
If you are cruising and come off the accelerator and coast and then go back onto the accelerator and use both electric and engine the problem never occurs....its only at very low speeds.
I spoke to a Lexus specialist and was looking to book the car in with them but they didn't seem that interested, but they did mention that it could be Coil Packs or Flex Plate in the Gearbox.
Re Coil Packs, as there is no Engine Management Light on its hard to diagnose a failing Coil Pack...or at least I think its difficult to diagnose....i could be wrong.
2ndly the Flex Pate....not sure on this one, as I'm sure if it was a Flex Plate it would cause Judders at all speeds and be making a rattling sound from the gearbox....anybody have any experience with failing Flex Plates?
Look forward to getting some thoughts on this Judder problem
Lexus Champion
Joined: Apr 2019
Posts: 11,253
Likes: 1,598
From: FL
Advanced
Joined: May 2016
Posts: 557
Likes: 53
From: Ontario
I spoke to a Lexus specialist and was looking to book the car in with them but they didn't seem that interested, but they did mention that it could be Coil Packs or Flex Plate in the Gearbox.
I think I'd be staying away from that ' Advisor'.
I think I'd be staying away from that ' Advisor'.
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