Who says a KA can't rev high? - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

LA_phantom_240 · 11-06-2007, 12:30 PM

LOL

Okay so seriously, I need to get my tach working right again. Sometimes it works, sometimes it works but twitches a bit varying around 200rpms off, sometimes it reads idle, and sometimes it ever so slowly climbs to how you see it. The motor in the car is a lower mileage KA, and the previous owner said someting about how the tach is getting the signal from the engine. What should I try, without fishing the gauge cluster out of the dash?

slow40 · 11-06-2007, 12:43 PM

love the sig man..lol

dropping the cluster isn't that hard though

LA_phantom_240 · 11-06-2007, 01:46 PM

Eh... I wanna make sure that there isn't something loose on the motor or something first. And if the tach is bad, what can I do that doesn't require hunting down another SE cluster?

*downshift_sideways* · 11-06-2007, 01:49 PM

Pull out the gauge cluster. Takes 15 mins. Check all wires,tabs, needles.

Worste case, buy a new cluster.?

!Zar! · 11-06-2007, 02:10 PM

It's most likely the speed sensor.

Check the plug.

98koukile · 11-06-2007, 08:42 PM

Quote:

Originally Posted by !Zar!

It's most likely the speed sensor.

Check the plug.

Not on an S14 my friend. I don't even have a speed sensor and my tach works. Check the CAS on the top of the transmission right behind the engine. It measures the flywheel speed to show your RPM

Skullavera · 11-07-2007, 12:53 AM

Quote:

Originally Posted by 98koukile

Not on an S14 my friend. I don't even have a speed sensor and my tach works. Check the CAS on the top of the transmission right behind the engine. It measures the flywheel speed to show your RPM

Oh shit! How the hell does my rpm gauge work? I don't have that on my tranny! Lol.

On an S14 the RPM signal comes from the distributor (internal coil). Check your distributor plug and look for any pins that may not be making contact. I believe the problem itself may lie in that or your cluster. If you have a spare distributor, just install it and see if that's it. If it's not then it's the cluster. If that doesn't work then the problem must lie in the wiring itself. Download the FSM and check the wiring. That's what I'd do.

Also, the CPS (Crankshaft Position Sensor) does not read RPM. This was taken directly from the FSM:

"The crankshaft position sensor (OBD) is located on the transmission housing facing the gear teeth (cogs) of the flywheel (driveplate). It detects the fluctuation of the engine revolution. The sensor consists of a permanent magnet, cor and coil. When the engine is running, the gap between the sensor and the gear teeth (cogs) will periodically change. Permeability near the sensor also changes. Due to the permeability change, the magnetic flux near the core is changed. Therefore, the voltage signal generated in the coil is changed. The ECM receives the voltage signal and detects the fluctuation of the engine revolution. The sensor is not directly used to control the engine system. it is used only for the on-board diagnosis of misfire."

LA_phantom_240 · 11-06-2007, 02:24 PM

Wheres the engine speed sensor?

*downshift_sideways* · 11-06-2007, 02:29 PM

Should be on the pass side of the transmission.(Under the car)

a harness is ran to it. I think its like a 8-9mm bolt.(not sure)

LA_phantom_240 · 11-07-2007, 12:05 AM

How hard is it to get to?

11-07-2007, 12:56 AM

i think you threw a rod

is your check engine light on? did you pop your hood and check to see if your engine is still there?

haha sorry man, i'm still recovering from the honda/burbank 240 meet i accidentally went to tonight

Skullavera · 11-07-2007, 01:18 AM

Lmfao!!!!!^^^^

LA_phantom_240 · 11-07-2007, 07:29 AM

I have NO spare s14 parts layin around. I have about enough s13 parts to build one, sans body.

LA_phantom_240 · 11-07-2007, 09:34 PM

Yeah, my tach is bad. It broke today. It is stuck pegged out. Time for an aftermarket unit.

Skullavera · 11-07-2007, 09:56 PM

Aftermarket unit? Please don't tell me an APC 50" Widescreen Super Tuner tach for your dash....

LA_phantom_240 · 11-08-2007, 02:23 AM

Quote:

Originally Posted by Skullavera

Aftermarket unit? Please don't tell me an APC 50" Widescreen Super Tuner tach for your dash....

Actually, I was thinking of getting a small sunpro... like 3". Something discrete, that I can put in front of the factory tach without much blockage.

Oh and about finding a junkyard tach... yeah, there are no s14s in junkyards within like 100 miles of me.

johngriff · 11-07-2007, 10:02 PM

just find another tach @ the junk yard, remove it from the gauge cluster, replace.

Skullavera · 11-08-2007, 02:30 AM

Just source a cluster here on zilvia. They usually run about 40-60 bucks. This guy is parting out his S14. Maybe he can help you out.

http://www.zilvia.net/f/showthread.php?t=163743

11-06-2007, 01:49 PM	#4
downshift_sideways No Limit Soldier. Join Date: Jan 2006 Location: Hayward CA, San Gabriel CA Age: 38 Posts: 5,550 Trader Rating: (0) Rides Gallery: downshift_sideways Feedback Score: 0 reviews	Pull out the gauge cluster. Takes 15 mins. Check all wires,tabs, needles. Worste case, buy a new cluster.? __________________ allntrlundrgrnd: "you never really appreciate your parents fridge until you look into your own and its full of condiments only"

11-06-2007, 02:10 PM	#5
!Zar! Post Whore! Join Date: Nov 2004 Location: North Korea Posts: 14,579 Trader Rating: (27) Feedback Score: 27 reviews	It's most likely the speed sensor. Check the plug. __________________

11-06-2007, 02:29 PM	#9
downshift_sideways No Limit Soldier. Join Date: Jan 2006 Location: Hayward CA, San Gabriel CA Age: 38 Posts: 5,550 Trader Rating: (0) Rides Gallery: downshift_sideways Feedback Score: 0 reviews	Should be on the pass side of the transmission.(Under the car) a harness is ran to it. I think its like a 8-9mm bolt.(not sure) __________________ allntrlundrgrnd: "you never really appreciate your parents fridge until you look into your own and its full of condiments only"

11-07-2007, 01:18 AM	#12
Skullavera Zilvia FREAK! Join Date: Sep 2005 Location: City of Angels Posts: 1,327 Trader Rating: (1) Rides Gallery: Skullavera Feedback Score: 1 reviews	Lmfao!!!!!^^^^ __________________ Reviews/Feedback!

11-07-2007, 09:56 PM	#15
Skullavera Zilvia FREAK! Join Date: Sep 2005 Location: City of Angels Posts: 1,327 Trader Rating: (1) Rides Gallery: Skullavera Feedback Score: 1 reviews	Aftermarket unit? Please don't tell me an APC 50" Widescreen Super Tuner tach for your dash.... __________________ Reviews/Feedback!

11-06-2007, 12:43 PM	#2
slow40 Zilvia Junkie Join Date: Nov 2006 Location: TN Age: 39 Posts: 360 Trader Rating: (0) Feedback Score: 0 reviews	love the sig man..lol dropping the cluster isn't that hard though

11-07-2007, 12:56 AM	#11
ixfxi Guest Posts: n/a	i think you threw a rod is your check engine light on? did you pop your hood and check to see if your engine is still there? haha sorry man, i'm still recovering from the honda/burbank 240 meet i accidentally went to tonight

11-07-2007, 10:02 PM	#17
johngriff Post Whore! Join Date: Jun 2004 Location: Long Beach, CA Posts: 4,103 Trader Rating: (4) Rides Gallery: johngriff Feedback Score: 4 reviews	just find another tach @ the junk yard, remove it from the gauge cluster, replace. __________________ [email protected]

11-08-2007, 02:30 AM	#18
Skullavera Zilvia FREAK! Join Date: Sep 2005 Location: City of Angels Posts: 1,327 Trader Rating: (1) Rides Gallery: Skullavera Feedback Score: 1 reviews	Just source a cluster here on zilvia. They usually run about 40-60 bucks. This guy is parting out his S14. Maybe he can help you out. http://www.zilvia.net/f/showthread.php?t=163743 __________________ Reviews/Feedback!