Jump to content
SAU Community

Weird Tacho Problem, Need Help

SL33K

By SL33K,
in General Maintenance

 Share

Recommended Posts

SL33K Experienced

SL33K

Posted
Posted

Hey Guyz,

This afternoon i had a weird problem with my tacho. When i turned on the ignition to the ON position, the tacho meter started fluctuating up and Down. Withouth even starting the engine. I Switched off and on again and the problem went away.

Anyways, when driving in the city the problem came back and this time even when driving. when i was driving normal at about 2500RPM it was showing about 5000RPM.

Has anyone experienced this? Any help will be appreciated.

I recorded a bit of it while parked. Engine OFF.

video here - http://www.youtube.com/watch?v=xQWx1lAMgF8

Link to comment
https://www.sau.com.au/forums/topic/360840-weird-tacho-problem-need-help/
Share on other sites
PsYLoR Collaborator

PsYLoR

Posted
Posted

Ive got that problem atm :S

Only thing I can think of is possibly a loose or faulty wire somewhere.... maybe? Ive pulled out the cluster and tacho and completely pulled it apart looking for a bad solder or loose wiring but found nothing, have given the dash a hit which fixed it momentarily. lol

But it has slowly started happening more often for me :S

Other note... I have PFC with controller and it always shows the correct engine revs, even when the taco is going crazy. So for me its either the cluster itself or a wire between the ECU and cluster. I was going to buy a new cluster but I'm sure I read of someone with the same problem and a new cluster didn't fix it. I haven't been bothered to look at wiring as yet though, Anyway - I'd say its either bad wiring or the cluster. good luck.

SL33K Experienced

SL33K

Posted
  • Author
Posted

Thanx for the reply mate.

Going overseas tomorrow so wont be tryin to fix it untill i get back.

I am planning to open up everything and see if somethings loose. I tapped it too and it worked fine for a while.

Will update here if i fix it.

Cheers,

Vish.

  • 2 weeks later...
Jmans GTS-T Enthusiast

Jmans GTS-T

Posted
Posted

Ive got that problem atm :S

Only thing I can think of is possibly a loose or faulty wire somewhere.... maybe? Ive pulled out the cluster and tacho and completely pulled it apart looking for a bad solder or loose wiring but found nothing, have given the dash a hit which fixed it momentarily. lol

But it has slowly started happening more often for me :S

Hey man, I'm with you, with the same problem... But b4 buying a new cluster borrow one off someone to make sure it is the cluster....

This looks like a common problem these days :(

Other note... I have PFC with controller and it always shows the correct engine revs, even when the taco is going crazy. So for me its either the cluster itself or a wire between the ECU and cluster. I was going to buy a new cluster but I'm sure I read of someone with the same problem and a new cluster didn't fix it. I haven't been bothered to look at wiring as yet though, Anyway - I'd say its either bad wiring or the cluster. good luck.

  • 2 weeks later...

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now
 Share
Go to topic listing


  • Similar Content

  • Latest Posts

    • GTSBoy
      RB26DETT Sketchy boost mod?

      By GTSBoy · Posted

      There's restrictor pills in the stock boost control hoses. That's how they set the amount that was bled off and hence the "high" boost setting. The usual mod in the day was to remove it and send the "high" boost setting up to about 14 psi.
    • ARB26
      RB26DETT Sketchy boost mod?

      By ARB26 · Posted

      Thanks Duncan, that's the best info I've read. Furthermore after learning about the PCM programming side controlling the factory boost solenoid, the purpose of the solenoid is to "bleed" boost when pin 25 is earthed, thus allowing spring pressure in the wastegate actuator to overcome diaphragm boost pressure, thus closing or reducing the position of the wastegate flap creating more boost as the turbo is able to spin faster. It's pretty cool to see a designated Pill to do exactly this, would have liked to have seen it with a tiny filter over the end for those moments in vacuum.  The constant bleed pill has now been removed completely from the system and solenoid boost control has been restored once again.   Case closed 😂
    • GTSBoy
      Cas issue

      By GTSBoy · Posted

      The wideband reading is meaningless if it's not running. Why are you using shitty old sidefeeds on any engine, let alone a Neo? What manifold and fuel rail are you using to achieve that? Beyond that, can't help you with AEM stuff as I've never been their ECU/CAS combo.
    • Duncan
      RB26DETT Sketchy boost mod?

      By Duncan · Posted

      Manual boost controllers (where a little of the boost was bled off) were quite common back in the day, because they were cheap and easy. Generally they had a manual adjustment screw rather than being fixed like yours. Down side is they always bleed boost, not just when you want them to so an electronic boost controller that uses a solenoid will have less lag.
    • nash47
      Cas issue

      By nash47 · Posted

      Hello , im new here and i have A31 home build  RB25det neo stock eng / turbo  aem ems 2 blue connector  aem 3.5 map aem cas disk aem wideband connected to ecu  355 lph pump 550 nismo yellow injectors side feed aftermarket regulator  and won’t start with base aem tuner basic tune eventually flipped cas 180 degree so it triggers on correct stroke not in exhaust cycle  Now it won’t start Wideband reads 10 and 11 at lowest fuel setting  and will share calibrations soon for aem tuner i think something is wrong in aem tuner    please if you have any information, am very grateful         
×
×
  • Create New...