Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

Go Back   Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum > General > Tech Talk > S Chassis

S Chassis Technical discussion related to the S Chassis such as the S12, S13, S14, and S15.


Reply
 
Thread Tools Display Modes
Old 06-05-2013, 10:33 AM   #1
Brandon_240
 
Join Date: Dec 2011
Location: Northern NJ
Posts: 24
Trader Rating: (0)
Brandon_240 is an unknown quantity at this point
Feedback Score: 0 reviews
s14 S14 Speedometer Malfunction?

Okay so I bought my first car the other day and its a 96 zenki. The car isn't in the best shape cosmetically but mechanically it runs fine. Ok so enough of that, the speedo reads a way higher speed than I'm actually going and I have no idea why. Ex; Cruising in 5th going with traffic around 2500 rpm, the speedo tells me I'm doing 120. I don't know if the previous owner had larger wheels at one point or what, but I have no idea what I should do. I should probably also add that it has an S13 trans.
Brandon_240 is offline   Reply With Quote
Sponsored Links
Old 06-05-2013, 10:51 AM   #2
Mikester
Nissanaholic!
 
Mikester's Avatar
 
Join Date: Jun 2007
Location: Kathleen, GA
Age: 52
Posts: 1,956
Trader Rating: (0)
Mikester is a well-known jackass
Feedback Score: 0 reviews
Umm, is the speedo maybe in Km/h instead mph? If it's consistent throughout, that could be the issue.

If you aren't sure- here is an easy way to tell: Get on mapmyrun.com and map out a 1-mile drive... Go to the starting point, reset the trip-meter to zero. Drive the route. If at the end of the mile, the trip timer reads 1.6(ish), your speedo is km/h.

If you are sure that it's mph and malfunctioning, and operating smoolthly except for the wrong speed... you may want to ensure the correct speed sensor is installed.

HOWEVER, in 5th gear @2,500-ish rpm sounds an awful lot like 65-70mph... If so, then the speedo is prolly km/h in which case you need to know this (not exact figures, but close enough to keep you from getting stopped for speeding):

20km/h = 15mph

40km/h = 25mph

60km/h = 35mph

70km/h = 40mph

80km/h = 50mph

90km/h = 55mph

100kn/h = 60mph

110km/h = 65mph

120km/h = 70mph

130km/h = 80mph

Easiest way to do it is drop the 0 from the km/h, multiply by 6 and that's your 'approximate' mph.
__________________
Mikester is offline   Reply With Quote
Old 06-05-2013, 11:48 AM   #3
Brandon_240
 
Join Date: Dec 2011
Location: Northern NJ
Posts: 24
Trader Rating: (0)
Brandon_240 is an unknown quantity at this point
Feedback Score: 0 reviews
Quote:
Originally Posted by Mikester View Post
Umm, is the speedo maybe in Km/h instead mph? If it's consistent throughout, that could be the issue.

If you aren't sure- here is an easy way to tell: Get on mapmyrun.com and map out a 1-mile drive... Go to the starting point, reset the trip-meter to zero. Drive the route. If at the end of the mile, the trip timer reads 1.6(ish), your speedo is km/h.

If you are sure that it's mph and malfunctioning, and operating smoolthly except for the wrong speed... you may want to ensure the correct speed sensor is installed.

HOWEVER, in 5th gear @2,500-ish rpm sounds an awful lot like 65-70mph... If so, then the speedo is prolly km/h in which case you need to know this (not exact figures, but close enough to keep you from getting stopped for speeding):

20km/h = 15mph

40km/h = 25mph

60km/h = 35mph

70km/h = 40mph

80km/h = 50mph

90km/h = 55mph

100kn/h = 60mph

110km/h = 65mph

120km/h = 70mph

130km/h = 80mph

Easiest way to do it is drop the 0 from the km/h, multiply by 6 and that's your 'approximate' mph.
Yeah at first I thought it could've been in km but its in mph with the km underneath, maybe its reading the mph as km and I should just read the mph as km? And it works as it should but reads way faster than I'm going
Brandon_240 is offline   Reply With Quote
Old 06-05-2013, 12:11 PM   #4
s14SRguy
Leaky Injector
 
Join Date: Jul 2012
Location: riverside
Posts: 132
Trader Rating: (2)
s14SRguy is an unknown quantity at this point
Feedback Score: 2 reviews
incorrect/faulty speed sensor.
changing wheel/tire size shouldn't make that much of a difference.

Odds are your s13 trans still has the s13 speed sensor.
Make sure you get the s14 speed sensor, as an s13 won't match up properly with your cluster.

s13 and s14 speed sensors are the same size, bolt in the same, they just send different electrical signals. Odds are when the previous owner did the swap they didn't replace that sensor. If there is no difference after replacing the speed sensor then your cluster might be going out.

Last edited by s14SRguy; 06-05-2013 at 01:07 PM..
s14SRguy is offline   Reply With Quote
Old 06-05-2013, 12:32 PM   #5
Brandon_240
 
Join Date: Dec 2011
Location: Northern NJ
Posts: 24
Trader Rating: (0)
Brandon_240 is an unknown quantity at this point
Feedback Score: 0 reviews
Quote:
Originally Posted by s14SRguy View Post
incorrect/faulty speed sensor.
changing wheel/tire size shouldn't make that much of a difference.

Odds are your s13 trans still has and s13 speed sensor.
Make sure you get the s14 speed sensor, as an s13 won't match up properly with your cluster.

s13 and s14 speed sensors are the same size, bolt in the same, they just send different electrical signals. Odds are when the previous owner did the swap they didn't replace that sensor. If there is no difference after replacing the speed sensor then your cluster might be going out.
I thought it could have something to do with the s13 trans, thanks man I'm looking for an s14 trans to swap with, 1st gear is such a dirty cunt on that thing
Brandon_240 is offline   Reply With Quote
Old 10-03-2013, 11:34 AM   #6
crewchief05
Zilvia Member
 
Join Date: Sep 2013
Location: Arkansas
Posts: 280
Trader Rating: (8)
crewchief05 is an unknown quantity at this point
Feedback Score: 8 reviews
I heard you can just swap a auto s14 into a sr. Just have to shave it down to fit
crewchief05 is offline   Reply With Quote
Reply

Bookmarks

Tags
gauges, s14, speedometer, wiring, zenki


Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT -6. The time now is 05:52 AM.


Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2024, vBulletin Solutions Inc.
vB.Sponsors
Copyright ? 1998 - 2022, Zilvia.net