Damn speedo acting up......... - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

kota2240 · 02-01-2006, 03:42 PM

Has anyone had a problem where their speedometer rises at idle when reving the motor, then it stops once the idle is back down. The problem with this is when the car is warming up the tach is around 2k or so and the speedo is reading like 50mph and the mileage moves too??? For my S13

I searched and two guys had the same problem but they havent made a post since 2002 without any solutions

*NemeGuero* · 02-01-2006, 03:46 PM

The sensor shouldn't be moving at all if you're in idle in neutral.

Posibilties:
gauge cluster
VSS
wiring to VSS

g6civcx · 02-01-2006, 04:12 PM

You may want to add that the speedo should show the true speed of the car regardless of the gear and engine speed you're at.

So if you sit in the parking lot, it should not move at all no matter how hard you rev it. Obviously if you're coasting it should show whatever speed the car is moving at.

kota2240 · 02-02-2006, 06:54 AM

the speedo fluctuates at idle when i rev the motor up also causing the odometer to move. Anything above 750 at idle causes the digital speedo to move from 50mph-100mph???

*NemeGuero* · 02-02-2006, 12:31 PM

Ooohh, DIGITAL speedo? Well, that shouldn't matter, the sensors should be the same. I'd replace the speed sensor and see if it makes anything better.

kota2240 · 02-02-2006, 03:48 PM

ill hit the junkyard this week and see what happends Thanks

02-01-2006, 03:42 PM	#1
kota2240 Zilvia Junkie Join Date: May 2004 Location: East Coast Posts: 427 Trader Rating: (4) Feedback Score: 4 reviews	Damn speedo acting up......... Has anyone had a problem where their speedometer rises at idle when reving the motor, then it stops once the idle is back down. The problem with this is when the car is warming up the tach is around 2k or so and the speedo is reading like 50mph and the mileage moves too??? For my S13 I searched and two guys had the same problem but they havent made a post since 2002 without any solutions

02-01-2006, 03:46 PM	#2
NemeGuero No more nissan. Join Date: Jan 2003 Location: RAIN, Washington. Age: 40 Posts: 8,132 Trader Rating: (10) Rides Gallery: NemeGuero Feedback Score: 10 reviews	The sensor shouldn't be moving at all if you're in idle in neutral. Posibilties: gauge cluster VSS wiring to VSS __________________

02-02-2006, 12:31 PM	#5
NemeGuero No more nissan. Join Date: Jan 2003 Location: RAIN, Washington. Age: 40 Posts: 8,132 Trader Rating: (10) Rides Gallery: NemeGuero Feedback Score: 10 reviews	Ooohh, DIGITAL speedo? Well, that shouldn't matter, the sensors should be the same. I'd replace the speed sensor and see if it makes anything better. __________________

02-01-2006, 04:12 PM	#3
g6civcx Post Whore! Join Date: Apr 2004 Location: Virginia, USA Posts: 5,764 Trader Rating: (5) Feedback Score: 5 reviews	You may want to add that the speedo should show the true speed of the car regardless of the gear and engine speed you're at. So if you sit in the parking lot, it should not move at all no matter how hard you rev it. Obviously if you're coasting it should show whatever speed the car is moving at.

02-02-2006, 06:54 AM	#4
kota2240 Zilvia Junkie Join Date: May 2004 Location: East Coast Posts: 427 Trader Rating: (4) Feedback Score: 4 reviews	the speedo fluctuates at idle when i rev the motor up also causing the odometer to move. Anything above 750 at idle causes the digital speedo to move from 50mph-100mph???

02-02-2006, 03:48 PM	#6
kota2240 Zilvia Junkie Join Date: May 2004 Location: East Coast Posts: 427 Trader Rating: (4) Feedback Score: 4 reviews	ill hit the junkyard this week and see what happends Thanks