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.

After pulling the plenum and putting it all back together I seem to have a very rough idle to the point where the battery light comes fading on and off as the car tries to keep itself alive! Brand new tested battery by the way!

 

Anyhow I was trying to adjust the idle from the IAA valve but it doesnt seem to do anything to my base idle which is sitting somewhere around 480-500rpm! Could I assume that my IAA is a bit dead? And my car stinks of petrol... very badly! :cry:

Featured Replies

I'd be more inclined to think she's badly overfuelling mate, boost leak or temp sender on top inlet pipe. If you find either of these at fault remove plugs and clean em up and then refit.

smithy

Check all the fuel line clamps are tight. If they're leaking then the fuel rail will be below its working pressure and the injectors will not be giving enough fuel, hence the low idle...

Oh, have you got the fuel lines the right way round also? Feed and return?

  • Author

Just back from the garage to do a quick look around. The temp sensors and sender was cleaned before I had to do the plenum pull to replace the water hoses. Fuel lines are definetly in the right way around and all fuel clamps are brand new and I made sure they where tight enough before I shoved them back in. EGR pipes have been tighted and are fine. The only vacumn problem I can think of is me putting something in the wrong place but I'm pretty sure that I have all hoses in the right place, I'll get some pictures just in case though.

 

One thing I have noticed though is that I'm getting a weird buzzing noise if I turn the TPS clockwise. I take it something is a bit wrong there...! :cry:

Is the car running on all 6.you may have a poor coil connection.if it drops a cylinder the tickover will be low and the car will struggle to tick over.worth a check.

  • Author

I think I may have a slight vacumn leak as I can hear some sort of whining noise near the back of the engine. Though if I slightly increase the revs would this make the vacumn more noticeable as in it changes it's tone to a more higher pitched one prob due to more air running through it?

 

I'm sure my coil connections are fine though those are on my list of to buy new connectors and replace. I've managed to get the car to idle at around 600RPM right now but can't get it up any more.

I had rough idling after an engine out -they had two of the small bore air pipes switched around - no boost gauge was the hint. Once I swapped them back the tickover whent back smooth as silk and the guage worked again. - pipes were at the gizmos at the driverside back corner under bonnet.

  • Author
Is the car running on all 6.you may have a poor coil connection.if it drops a cylinder the tickover will be low and the car will struggle to tick over.worth a check.
It was running on 5! Then I found out that the connector for the fuel rail wasnt plugged in. :headvswal In any case I've now gotta add some nice new connectors on my list to buy as most of mine are crap, brittle and doesnt have the metal clip.

 

Thanks for all the suggestions and help!

 

Now, time to get rid of that rattle and get meself a new accelerator cable!

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.