Ok, my car is showing a code 24 "Circut fault in vehicle speed sensor." What the hell does that mean? My car has a hard time (most of the time won't even at all) sitting at idel. Once I give her gas, she is good, but as soon as I let off, she dies out.

This started right after I unpluged my battery to disconect my airbag.

HELP! What can I do......

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25th Anniversary Z28

 

Ok, I have read up on this VSS thing, and it sounds like that is why my speedo does not work. Now, from what I gather the VSS is located on the transmission? Whould that cause the problems listed above? I am sure it is causing my MPH gauge not to work, but why would my car no stay running?

PS how much is a new VSS and is it a pain to change out?

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25th Anniversary Z28

 

Check to make sure your pulse generator is still connected. Its the wire attached to the rear of your trans, on the driver's side.

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1991 Camaro Z28
5.7L 5-Speed (originally 305)
13.25 @ 107.18 MPH
Southern California
Member: SoCal 3rd Gen F-Bodies
Webmaster: SoCal F-Bodies
-=ICON Motorsports=-

 

Ok, but would that cause it not to stay running? My speedo has not worked for months, this idel problem is very recent.



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25th Anniversary Z28

 

Anyone? Help!!!!!!!

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25th Anniversary Z28

 

The idle problem is probably unrelated, and whatever it is, isn't setting a code. Could be a vacuum leak, IAC problem (usually sets a code), clogged idle passages, and many other possibilities. May want to start woth a tune-up if one hasn't been done recently.

The VSS code, could be the sensor actually bad, or a break in the wiring to the sensor. As stated above, it is in the tailshaft of the trans., on the driver's side. I think you can check the sensor with a voltmeter set to the low AC voltage scale connected to the sensor, spin the driveshaft, and it should generate a voltage. Someone else may be able to give more specifics on this test.

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Working on:
'84 Z28 LG4 305
Added dual elec fans.
145 MPH IROC Speedo
Building 430 HP 350
using primarily GMPP parts.
Block is in shop!

Awaiting results from all 8 ASE tests.

Starting to look like the Kicker poster child!

[This message has been edited by JP84Z430HP (edited November 15, 2000).]

 

Well, I think it is my TPS and my VSS. That is like a $110 for both, so the VSS will have to wait (I don't care how fast I am going), but the TPS is going and a new one is on the way.

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25th Anniversary Z28

 

You might not care how fast you are going, but your computer does. Your car will run like crap around town until you get it fixed... Good luck.

 

The ECM doesnt take the vehicle's speed into consideration for anything other then TCC lockup. So the car will actually "feel" quicker since the TCC won't lockup at 38 mile per hour like it usually does.

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92 Z28 L98 350
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Ported and polished heads, ported stock TPI base, ported plenum, Comp Cams XR270HR-10 cam (lift .495/.502 duration 218/224 lobe separation 110), Edelbrock TES headers, LT4 valve springs, Crane AFPR, Flowmaster catback with LT1 style tips, MSD coil & wires.

Best ET 13.5@105 mph

"Take that auto, drop it in first, hold the brakes, stomp the gas and grin from ear to ear! :-)

http://www.truspeed.dhs.org/Members/...dmondIndre.htm

 

Did I once read to disregard a code 24 if the wheels are not turning? I get that code if the car idles on start up for very long, but after driving a block or so, the check engine light goes off.

JamesC

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