# 2004 Jaguar XJ8 sudden unintended acceleration **URL:** \ **Category:** Maintenance/Repairs\ **Tags:** jaguar, xj8\ **Created:** [September 3, 2020, 8:57pm UTC](https://community.cartalk.com/t/2004-jaguar-xj8-sudden-unintended-acceleration/169541 "2020-09-03T20:57:26Z")\ **Posts on this page:** 10\ **Page:** 1
**Author:** ![CLINTACKERMAN](https://avatars.discourse-cdn.com/v4/letter/c/43a26b/32.png) [@CLINTACKERMAN](https://community.cartalk.com/u/CLINTACKERMAN)\ **Post date:** [September 3, 2020, 8:57pm UTC](https://community.cartalk.com/t/2004-jaguar-xj8-sudden-unintended-acceleration/169541/1 "2020-09-03T20:57:26Z")
2004 XJ8… sudden intended acceleration…happened twice. afraid to drive ---
**Author:** ![It\_s-Me](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/it_s-me/32/12660_2.png) [@It\_s-Me](https://community.cartalk.com/u/It_s-Me)\ **Post date:** [September 3, 2020, 9:14pm UTC](https://community.cartalk.com/t/2004-jaguar-xj8-sudden-unintended-acceleration/169541/2 "2020-09-03T21:14:56Z")
> [@CLINTACKERMAN](#): > > 2004 XJ8… sudden intended acceleration…happened twice. afraid to drive I would hope the intended acceleration happened every time. Isn’t that why you push on the throttle? ---
**Author:** ![oldnotdeadyet](https://avatars.discourse-cdn.com/v4/letter/o/a6a055/32.png) [@oldnotdeadyet](https://community.cartalk.com/u/oldnotdeadyet)\ **Post date:** [September 3, 2020, 10:11pm UTC](https://community.cartalk.com/t/2004-jaguar-xj8-sudden-unintended-acceleration/169541/3 "2020-09-03T22:11:37Z")
Of course he means UN-intended accel. I would immediately take this to the dealer, report it to NHSTA and carefully read my State’s lemon laws. This is nothing to play around with. ---
**Author:** ![It\_s-Me](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/it_s-me/32/12660_2.png) [@It\_s-Me](https://community.cartalk.com/u/It_s-Me)\ **Post date:** [September 3, 2020, 10:18pm UTC](https://community.cartalk.com/t/2004-jaguar-xj8-sudden-unintended-acceleration/169541/4 "2020-09-03T22:18:34Z")
> [@oldnotdeadyet](#): > > carefully read my State’s lemon laws. It’s a 16 year old car, a little past lemon law. ---
**Author:** ![CLINTACKERMAN](https://avatars.discourse-cdn.com/v4/letter/c/43a26b/32.png) [@CLINTACKERMAN](https://community.cartalk.com/u/CLINTACKERMAN)\ **Post date:** [September 3, 2020, 10:56pm UTC](https://community.cartalk.com/t/2004-jaguar-xj8-sudden-unintended-acceleration/169541/5 "2020-09-03T22:56:18Z")
Spent the day how to rectify/ live with. Flash ecu Put in neutral when slowing down for stopping When putting in drive. Or reverse …foot on brake. Off accelerator pedal Any other thoughts? ---
**Author:** ![oldnotdeadyet](https://avatars.discourse-cdn.com/v4/letter/o/a6a055/32.png) [@oldnotdeadyet](https://community.cartalk.com/u/oldnotdeadyet)\ **Post date:** [September 3, 2020, 11:47pm UTC](https://community.cartalk.com/t/2004-jaguar-xj8-sudden-unintended-acceleration/169541/6 "2020-09-03T23:47:03Z")
I was fooled by the 2021 in the heading. ---
**Author:** ![VOLVO-V70](https://avatars.discourse-cdn.com/v4/letter/v/8e8cbc/32.png) [@VOLVO-V70](https://community.cartalk.com/u/VOLVO-V70)\ **Post date:** [September 3, 2020, 11:57pm UTC](https://community.cartalk.com/t/2004-jaguar-xj8-sudden-unintended-acceleration/169541/7 "2020-09-03T23:57:25Z")
> [@CLINTACKERMAN](#): > > Put in neutral when slowing down for stopping > When putting in drive. Or reverse …foot on brake. Off accelerator pedal > > Any other thoughts? Yes , I have thoughts. You should always have you foot on the brake pedal when changing from drive to reverse or reverse to drive. What are you going to do if someone has to drive your vehicle and they don’t shift to neutral when getting ready to stop ? Don’t try work around things to what may be a serious problem . Talk to a shop and see if they might have some idea of what to check. How long have you had this vehicle ? ---
**Author:** ![texases](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/texases/32/862_2.png) [@texases](https://community.cartalk.com/u/texases)\ **Post date:** [September 4, 2020, 1:30pm UTC](https://community.cartalk.com/t/2004-jaguar-xj8-sudden-unintended-acceleration/169541/8 "2020-09-04T13:30:06Z")
Are there any floor mats? ---
**Author:** ![Mustangman](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/mustangman/32/44130_2.png) [@Mustangman](https://community.cartalk.com/u/Mustangman)\ **Post date:** [September 4, 2020, 1:41pm UTC](https://community.cartalk.com/t/2004-jaguar-xj8-sudden-unintended-acceleration/169541/9 "2020-09-04T13:41:12Z")
> [@CLINTACKERMAN](#): > > Any other thoughts? Just HOW did you flash the ECU?? And what tools do you own that can identify the cause? I’d strongly suggest you take it someplace that can actually diagnose and repair the problem rather than just trying to live with it. You won’t live long that way. ---
**Author:** ![ok4450](https://avatars.discourse-cdn.com/v4/letter/o/e9bcb4/32.png) [@ok4450](https://community.cartalk.com/u/ok4450)\ **Post date:** [September 4, 2020, 4:18pm UTC](https://community.cartalk.com/t/2004-jaguar-xj8-sudden-unintended-acceleration/169541/10 "2020-09-04T16:18:39Z")
Maybe the problem is caused by a sticking throttle plate and it would be a good idea to clean the throttle body or there is an idle air valve problem. These would be considered normal maintenance or wear issues.