Jump to content
View in the app

A better way to browse. Learn more.

300ZX Owners Club

A full-screen app on your home screen with push notifications, badges and more.

To install this app on iOS and iPadOS
  1. Tap the Share icon in Safari
  2. Scroll the menu and tap Add to Home Screen.
  3. Tap Add in the top-right corner.
To install this app on Android
  1. Tap the 3-dot menu (⋮) in the top-right corner of the browser.
  2. Tap Add to Home screen or Install app.
  3. Confirm by tapping Install.

Hi Guys,

 

Have not been on here in a while because car has generally been running fine apart from one REALLLLY annoying problem that caused an accident today so I really need to get it sorted!!!

 

At low speeds or from standstill after blipping the throttle the engine almost dies or stalls completely. This is a real problem when accelerating onto slow moving roundabouts when I would blip the throttle then coast or brake to match the speed of traffic. This happened today - I was pulling onto a roundabout blipped the throttle and as the revs fell the car died!! A guy had decided to tailgate me onto the roundabout and ended up veering onto the centre of the island to miss me as I had lost brakes and steering - luckily he did not hit anything - But really need your ideas to fix this.

 

Jeff at Zedworld has had a look at it and he feels that it is the internals of the HKS SSQV dump valves sticking like the springs are not powerful enough to close the valves properly. When he covers the back of the valve with his hand to seal it the problem stops.

 

I have tried to find someone that sells the internals for the HKS valves but can't find anyone. I spoke to SumoPower about it as they are a pretty big HKS stockist and they do not know of anywhere you can get replacement internals but they brought up the point that the valves have been on the car less than 6 months so what are the chances of BOTH valves failing in the same way!

 

Does anyone have an idea what the problem could be as it has happened numerous times now and is really spoiling my enjoyment of the car to the point where I don't want to drive it every day. I don't want to fork out for a new pair of SSQV's only to find that the problem could be somewhere else.

 

PLEASE PLEASE help - all ideas welcome.

:angel::cursing::cursing::cursing:

Featured Replies

  • Author

Thanks Vince - has anyone else had this problem? do the springs need to be rated for the car? (Can't be just me can it?)

You may just need to overhaul the bov's, HKS are pritty helpful themselfs, if you contact them they will inform you of part numbers that you would need to overhaul the bov's etc...........then you can pass that part number to sumopower and get them to order it.

I was dealing with HKS direct for my bov's got all the correct numbers best deals etc before contacting sumopower.

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Guest
Unfortunately, your content contains terms that we do not allow. Please edit your content to remove the highlighted words below.
Reply to this topic...

Recently Browsing 0

  • No registered users viewing this page.

Important Information

Terms of Use

Configure browser push notifications

Chrome (Android)
  1. Tap the lock icon next to the address bar.
  2. Tap Permissions → Notifications.
  3. Adjust your preference.
Chrome (Desktop)
  1. Click the padlock icon in the address bar.
  2. Select Site settings.
  3. Find Notifications and adjust your preference.