tach fluctuates @ 2-3k rpms - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

Bigsyke · 08-24-2008, 09:26 PM

Just put in some solid mounts. The car seems to struggle a bit in the mid range.

The tach now seems to fluctuate around 2-3k rpms. It flutters about 500-1000rpms starting @ 2k rpm.

Could it be a loose ground, or more likely the cluster being vibrated so bad it shakes the tach needle? thanks fellahs!

Bigsyke · 08-25-2008, 10:18 AM

its an auto tranny, could this be the trans slipping? I assume solid MM's arent too healthy for an auto trans?

Bigsyke · 08-26-2008, 01:00 PM

Bump now all the gauges are fluttering.

Solid motor mounts tend to break stuff?

MangoDorifto · 08-26-2008, 02:16 PM

I've got solid mounts on my DD S14 SR but the tach only fluctuates at 2-3k on the highway. Not so much on the streets. They do tend to loosen or break things because of all the vibrations. I think your right about the solid mounts not being too friendly with an auto trans though.

Bigsyke · 08-26-2008, 02:24 PM

Yea seems the needles only bounce around @ 2-3 on the highway, or hell even in park.

The trans slipping seemed to get better after I added some lubegard red. You think its a loose ground? or just the cluster beeing vibrated.

SRpetey · 08-26-2008, 07:44 PM

Quote:

Originally Posted by MangoDorifto

I've got solid mounts on my DD S14 SR but the tach only fluctuates at 2-3k on the highway. Not so much on the streets. They do tend to loosen or break things because of all the vibrations. I think your right about the solid mounts not being too friendly with an auto trans though.

same thing happens to mine.

tougekid · 08-26-2008, 08:05 PM

mines at 3-3500. manual and solid motor and tranns mounts.
dont know why, when on dyno and computer, the read out from them doesnt show any fluxuation.
sooooo i guess its cool.

MangoDorifto · 08-27-2008, 12:23 AM

Quote:

Originally Posted by Bigsyke

Yea seems the needles only bounce around @ 2-3 on the highway, or hell even in park.

The trans slipping seemed to get better after I added some lubegard red. You think its a loose ground? or just the cluster beeing vibrated.

I think its the cluster being vibrated but it wouldn't hurt to check all your grounds and maybe cluster connections in the back.

I was out running errands today and I paid closer attention to the tach than usual. I noticed if I accelerated slowly above 3k on the streets, it would start to freak out. But if I WOT pass 3k to 4k, it would just climb normally.

I haven't really revved it pass 3k in neutral in a long time, so if I get a chance i'll give that a try and let you know.

08-24-2008, 09:26 PM	#1
Bigsyke Zilvia FREAK! Join Date: Jun 2008 Location: NA Age: 40 Posts: 1,342 Trader Rating: (0) Feedback Score: 0 reviews	tach fluctuates @ 2-3k rpms Just put in some solid mounts. The car seems to struggle a bit in the mid range. The tach now seems to fluctuate around 2-3k rpms. It flutters about 500-1000rpms starting @ 2k rpm. Could it be a loose ground, or more likely the cluster being vibrated so bad it shakes the tach needle? thanks fellahs!

08-25-2008, 10:18 AM	#2
Bigsyke Zilvia FREAK! Join Date: Jun 2008 Location: NA Age: 40 Posts: 1,342 Trader Rating: (0) Feedback Score: 0 reviews	its an auto tranny, could this be the trans slipping? I assume solid MM's arent too healthy for an auto trans?

08-26-2008, 01:00 PM	#3
Bigsyke Zilvia FREAK! Join Date: Jun 2008 Location: NA Age: 40 Posts: 1,342 Trader Rating: (0) Feedback Score: 0 reviews	Bump now all the gauges are fluttering. Solid motor mounts tend to break stuff?

08-26-2008, 02:16 PM	#4
MangoDorifto Leaky Injector Join Date: Oct 2005 Location: Oregon Posts: 113 Trader Rating: (8) Feedback Score: 8 reviews	I've got solid mounts on my DD S14 SR but the tach only fluctuates at 2-3k on the highway. Not so much on the streets. They do tend to loosen or break things because of all the vibrations. I think your right about the solid mounts not being too friendly with an auto trans though.

08-26-2008, 02:24 PM	#5
Bigsyke Zilvia FREAK! Join Date: Jun 2008 Location: NA Age: 40 Posts: 1,342 Trader Rating: (0) Feedback Score: 0 reviews	Yea seems the needles only bounce around @ 2-3 on the highway, or hell even in park. The trans slipping seemed to get better after I added some lubegard red. You think its a loose ground? or just the cluster beeing vibrated.

08-26-2008, 08:05 PM	#7
tougekid Zilvia Member Join Date: Aug 2007 Location: S.C. Age: 46 Posts: 242 Trader Rating: (1) Feedback Score: 1 reviews	mines at 3-3500. manual and solid motor and tranns mounts. dont know why, when on dyno and computer, the read out from them doesnt show any fluxuation. sooooo i guess its cool.