Results 1 to 8 of 8

Thread: Chirping Sound When Accelerating in Neutral

  1. #1
    Registered User
    Member ID
    CZCC-29980
    Join Date
    Dec 2013
    Location
    United States
    Posts
    3

    Default Chirping Sound When Accelerating in Neutral

    Hey guys, this is actually my first post here and just liked to give a little basic info first. I currently own a '78 280z and am located in SoCal. I recently just got the car back from Mike's Z Shop in Whittier (they do great work by the way and very friendly) after completing a transmission overhaul.

    This problem started occurring last night, a couple days after i got the car back so i don't think it has anything to do with that issue. So usually when i start my Z up I give it a little gas to ease the start up (also note that I am running triple webers) but last night as I did the same thing I got a loud chirping noise in return. I drove the car home fine and noticed the sound only occurs towards the low-mid rpm when I give it gas in neutral.

    If anyone have any insights as to what might be going on here, I'd greatly appreciate it!


    It's nice to meet you all and have a wonderful New Years Eve!

    -Matt

  2. #2
    Registered User olzed's Avatar
    Member ID
    CZCC-20649
    Join Date
    Dec 2009
    Location
    Auckland. New Zealand.
    Age
    76
    Posts
    1,069

    Default

    Hey Matt. Probably a loose fan belt.

  3. #3
    Registered User black gold man's Avatar
    Member ID
    CZCC-22534
    Join Date
    Sep 2010
    Location
    Detroit, Michigan, United States
    Age
    58
    Posts
    821

    Default

    Bearing in belt tensioner pulleys.
    Last edited by black gold man; 12-31-2013 at 03:33 PM.

  4. #4
    Registered User
    Member ID
    CZCC-29980
    Join Date
    Dec 2013
    Location
    United States
    Posts
    3

    Default

    Thanks for the input guys! I'll definitely check those two things out. As far as how urgent this issue is, am I in any immediate danger as far as driving it to my Z guy?

  5. #5
    Z geek at large FastWoman's Avatar
    Member ID
    CZCC-19635
    Join Date
    Jul 2009
    Location
    Hampton Roads, VA
    Posts
    2,787

    Default

    No danger. All you risk is a bit of wear on the belts, but a trip across town is no biggie. FAIW, it's a very easy job to tighten the belt(s) yourself. You can also try spraying the belts with a bit of belt dressing.
    My last three sports cars while I still owned all three:

    2001 BMW Z3 Roadster 3.0i soft/hard top (sold)
    1966 Ford Mustang Coupe (sold)
    1978 Datsun 280Z (enjoying very much )

  6. #6
    Registered User
    Member ID
    CZCC-7395
    Join Date
    Nov 2004
    Location
    Victoria B.C. Canada
    Age
    53
    Posts
    481

    Default

    My guess it's the alternator bearing(s) . Hand check that the pulley turns smoothly without the belt installed.
    Just my brand new 2014 2 cents worth - even if Canada don't make 'em anymore !

  7. #7
    Registered User
    Member ID
    CZCC-29980
    Join Date
    Dec 2013
    Location
    United States
    Posts
    3

    Default

    thanks for the input guys! it turned out to be a bad harmonic balancer which is a little more serious than just the belt issue but i made it to the shop just fine!

  8. #8
    Z geek at large FastWoman's Avatar
    Member ID
    CZCC-19635
    Join Date
    Jul 2009
    Location
    Hampton Roads, VA
    Posts
    2,787

    Default

    Wow... spooky! I had just mentioned a possible harmonic balancer issue to someone in another thread! I'm glad everything came out OK. Hope your wallet isn't too much lighter.
    My last three sports cars while I still owned all three:

    2001 BMW Z3 Roadster 3.0i soft/hard top (sold)
    1966 Ford Mustang Coupe (sold)
    1978 Datsun 280Z (enjoying very much )

Thread Information

Users Browsing this Thread

There are currently 1 users browsing this thread. (0 members and 1 guests)

Similar Threads

  1. Need to ADD a Neutral Safety Switch
    By oranngetang in forum Electrical (S30)
    Replies: 5
    Last Post: 11-02-2012, 11:42 AM
  2. only starts in neutral position
    By Zrod in forum Help Me !!
    Replies: 2
    Last Post: 08-11-2010, 08:55 PM
  3. Neutral switch in 4-speed.
    By cygnusx1 in forum Electrical (S30)
    Replies: 15
    Last Post: 03-05-2010, 08:46 AM
  4. deceleration while accelerating?
    By deadflo in forum Engine and Drivetrain (S30)
    Replies: 9
    Last Post: 08-02-2004, 09:18 AM
  5. Flat spot when Accelerating?
    By rustorbust in forum Fuel Injection (S30)
    Replies: 2
    Last Post: 04-27-2004, 07:40 AM

Tags for this Thread

Bookmarks

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •