Code 24
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Junior Member
Joined: May 2009
Posts: 32
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From: Brentwood, Ca
Car: 1986 Camaro Z28
Engine: 305 TPI
Code 24
Of course right before my car has to get smogged I get a check engine light. Checked it and its code 24. My speedo used to bounce around and squeak real back ,but now it doesn't work. Is it for sure my VSS that is bad?
Joined: Sep 2007
Posts: 2,179
Likes: 1
From: Port Orchard,WA
Car: 89 Camaro RS
Engine: 355 SD TPI
Transmission: WCT5
Axle/Gears: 3.08 Posi
Re: Code 24
your speedo is cable driven, your VSS may in fact be bad but thats not the cause of your speedo crapping out, check the VSS and make sure its connection is good, if it is and its shot swap it out, as for your speedo id take a look at your cable
Supreme Member
Joined: Jan 2009
Posts: 2,313
Likes: 115
From: belle fourche,s.d.
Car: '82 z28
Engine: L83 5.7
Transmission: 700r4-1985
Axle/Gears: 3.42 posi
Re: Code 24
The VSS is right behind the speedo on '82-89s and
works by reflecting a light beam off the rotating magnet
in the speedo,so no speedo=no VSS signal.
Sounds like your speedo bearing got dry,started binding
and chattering and twisted the cable-you will need to
oil the bearing before replacing the cable or get a new
speedo head if it's seized good...
works by reflecting a light beam off the rotating magnet
in the speedo,so no speedo=no VSS signal.
Sounds like your speedo bearing got dry,started binding
and chattering and twisted the cable-you will need to
oil the bearing before replacing the cable or get a new
speedo head if it's seized good...
Joined: Sep 2007
Posts: 2,179
Likes: 1
From: Port Orchard,WA
Car: 89 Camaro RS
Engine: 355 SD TPI
Transmission: WCT5
Axle/Gears: 3.08 Posi
Re: Code 24
If the vss is on the cluster then how is it possible to install aftermarket gauges with a t56 since they won't accept a cable driven speedo? Without an expensive mod that is
Joined: Aug 1999
Posts: 19,282
Likes: 103
From: Lawrence, KS
Car: Met. Silver 85 IROC/Sold
Engine: 350 HO Deluxe (350ci/330hp)
Transmission: T-5 (Non-WC)
Axle/Gears: Limited Slip 3.23's
Re: Code 24
https://www.thirdgen.org/forums/inte...eedo-woes.html
8t2, BTW, is correct: The VSS is on the back of the cluster (90+ have the VSS on the tail shaft). It's the small yellow box to the left in the following pic.:
https://www.thirdgen.org/forums/atta...-pics-bulb.jpg
JamesC
Last edited by JamesC; Nov 29, 2010 at 07:26 AM.
Thread Starter
Junior Member
Joined: May 2009
Posts: 32
Likes: 0
From: Brentwood, Ca
Car: 1986 Camaro Z28
Engine: 305 TPI
Re: Code 24
Ok fixed! Removed the stock two piece cable and replaced with a one piece cable. BUT...I still randomly get the same code. I am going to try to leave my battery unplugged overnight to see if I have to reset the system.
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Joined: Aug 1999
Posts: 19,282
Likes: 103
From: Lawrence, KS
Car: Met. Silver 85 IROC/Sold
Engine: 350 HO Deluxe (350ci/330hp)
Transmission: T-5 (Non-WC)
Axle/Gears: Limited Slip 3.23's
Re: Code 24
Long ago my 85 used to show a check engine light, code 24, when the car idled for a few minutes, then go off after I'd driven a block or so. The shop manual says to disregard the code if the wheels aren't turning.
JamesC
JamesC
Last edited by JamesC; Nov 30, 2010 at 11:21 AM.
Thread Starter
Junior Member
Joined: May 2009
Posts: 32
Likes: 0
From: Brentwood, Ca
Car: 1986 Camaro Z28
Engine: 305 TPI
Re: Code 24
Well, the problem is, I have to get it smogged soon. I don't think you can have the check engine light on at all for any reason.
Junior Member
Joined: Jan 2011
Posts: 7
Likes: 0
From: San Diego, CA
Car: 88 IROC-Z
Engine: 5.7
Transmission: 5-spd
Axle/Gears: D44 3.73
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