Make a donation

Author Topic: Sudden power loss under acceleration  (Read 1087 times)

Offline TheBALDpuma

  • Always Involved
  • ****
  • Thank You
  • -Given: 8
  • -Receive: 6
  • Posts: 324
    • Email
Sudden power loss under acceleration
« on: September 26, 2025, 09:24:57 pm »
Hi all, looking for some thoughts.

I was just re joining the A1 after the services and accelerating relatively hard on the slip road when at about 60mph it felt like I hit a sudden limiter and just lost all power. It then wouldn't accelerate much past 60, and if I let the speed drop it was really really slow to pick the speed back up. Felt like a sudden limp mode but there were no warning lights and otherwise engine running fine.

I pulled over, turned the engine off and on again a couple of times and drives off and all is fine. Power back to normal. Running fine. Did about another 100 miles no issues.

Any thoughts what's going on?

Offline GVK

  • Won't Shut up.
  • *****
  • Thank You
  • -Given: 1
  • -Receive: 70
  • Posts: 898
    • GVKmotorsport
    • Email
Re: Sudden power loss under acceleration
« Reply #1 on: September 26, 2025, 09:51:14 pm »
Was going to suggest you had a boost hose come off , but a restart wouldn't solve that!

Any warning lights on when it faulted?

Offline TheBALDpuma

  • Always Involved
  • ****
  • Thank You
  • -Given: 8
  • -Receive: 6
  • Posts: 324
    • Email
Re: Sudden power loss under acceleration
« Reply #2 on: September 26, 2025, 10:15:13 pm »
No warning lights at any point

Chatgpt has come up with a few options, from reading the options I'm thinking the N75 boost control solenoid could be to blame - anyone got any experience?

Offline GVK

  • Won't Shut up.
  • *****
  • Thank You
  • -Given: 1
  • -Receive: 70
  • Posts: 898
    • GVKmotorsport
    • Email
Re: Sudden power loss under acceleration
« Reply #3 on: September 26, 2025, 11:09:36 pm »
Could be that, I know they are a mission to fit on the mk5, buried round the back of the engine under the turbo.

I know you didn't have any warning lights on but can you check if any codes stored such as underboost etc?

Offline TheBALDpuma

  • Always Involved
  • ****
  • Thank You
  • -Given: 8
  • -Receive: 6
  • Posts: 324
    • Email
Re: Sudden power loss under acceleration
« Reply #4 on: September 27, 2025, 07:15:43 am »
Hey that's probably a good shout - will have to go to my local mechanic