Fordmods Logo

Home » Forums » Fordmods Tech » V8 Workshop

strange tacho happenings. 

 

Page 1 of 1 [ 8 posts ] 

Post New Topic Post Reply  Previous topic Next topic
 
Benny D
 Post subject: strange tacho happenings.
Posted: Wed Jan 19, 2011 9:19 pm 
Getting Side Ways
Offline
User avatar

Age: 37

Posts: 1507

Joined: 14th Aug 2009

Gallery: 12 images

Ride: BA XT V8

Location: Gosnells, Perth
WA, Australia
hey guys.
just somthin thats come up in the past few days.
up to around 3k rpm my tacho needle seems to jump up the revs. it happens both goin up and down the revs in any gear. any ideas would be appreciated. thnx.
oh its my ba xt 3v too.

 

_________________

BA XT V8. Ice Mint. 18" Speedys. XR6T LSD. Full Pacemaker twin 2 1/2inch Stainless Steel system. Custom CAI. Black XR interior with white trimming. Powerbond underdrive kit 25%.
13.65@102mph. 2800 hi-Stall.
230RWKW@5250 rpm. 625NM.
Top
 Profile  
 
 
XR9UTE
 Post subject: Re: strange tacho happenings.
Posted: Wed Jan 19, 2011 9:58 pm 
EFI Guru
Offline

Age: 59

Posts: 4359

Joined: 5th Nov 2004

Gallery: 28 images

Ride: 351 Vogue,XH 5.0,'17 5.0 Stang

Location: Perth
WA, Australia
Sounds like the tacho itself is stuffed. Notice anything else with the other gauges?
Check the connectors into the cluster are ok too.
Top
 Profile  
 
 
EBXR8380
 Post subject: Re: strange tacho happenings.
Posted: Wed Jan 19, 2011 10:41 pm 
Getting Side Ways
Offline
User avatar

Age: 71

Posts: 3555

Joined: 7th Nov 2004

Gallery: 4 images

Power: 482 rwkw

Location: Penrith
NSW, Australia
Yea check battery terminals..

 

_________________

As in ZOOM 126 edition
331 Dart block,3.25/ 4340 steel crank, Oliver rods,TFS ported track heat heads, TFS track heat inlet Twin SC61 turbo's
Project 1UZ-EF has started.. S475 Turbo 4.0 V8 Mustang Celica.....
Top
 Profile  
 
 
Benny D
 Post subject: Re: strange tacho happenings.
Posted: Thu Jan 20, 2011 10:15 am 
Getting Side Ways
Offline
User avatar

Age: 37

Posts: 1507

Joined: 14th Aug 2009

Gallery: 12 images

Ride: BA XT V8

Location: Gosnells, Perth
WA, Australia
na nothin goin on with anythin else.
might chek terminals and wiring after work. lol.
could it be any sensors?

 

_________________

BA XT V8. Ice Mint. 18" Speedys. XR6T LSD. Full Pacemaker twin 2 1/2inch Stainless Steel system. Custom CAI. Black XR interior with white trimming. Powerbond underdrive kit 25%.
13.65@102mph. 2800 hi-Stall.
230RWKW@5250 rpm. 625NM.
Top
 Profile  
 
 
XR9UTE
 Post subject: Re: strange tacho happenings.
Posted: Thu Jan 20, 2011 12:38 pm 
EFI Guru
Offline

Age: 59

Posts: 4359

Joined: 5th Nov 2004

Gallery: 28 images

Ride: 351 Vogue,XH 5.0,'17 5.0 Stang

Location: Perth
WA, Australia
Nope tacho signal is generated by the PCM and transmitted via the CAN to a microprocessor in the cluster so, no sensors.
Top
 Profile  
 
 
Benny D
 Post subject: Re: strange tacho happenings.
Posted: Thu Jan 20, 2011 3:53 pm 
Getting Side Ways
Offline
User avatar

Age: 37

Posts: 1507

Joined: 14th Aug 2009

Gallery: 12 images

Ride: BA XT V8

Location: Gosnells, Perth
WA, Australia
ah. so how can it be jumpy up till around 3k rpm then smooth?.. could a bad conectoin cause this or could it be a sign of worse to come.

 

_________________

BA XT V8. Ice Mint. 18" Speedys. XR6T LSD. Full Pacemaker twin 2 1/2inch Stainless Steel system. Custom CAI. Black XR interior with white trimming. Powerbond underdrive kit 25%.
13.65@102mph. 2800 hi-Stall.
230RWKW@5250 rpm. 625NM.
Top
 Profile  
 
 
XR9UTE
 Post subject: Re: strange tacho happenings.
Posted: Thu Jan 20, 2011 4:04 pm 
EFI Guru
Offline

Age: 59

Posts: 4359

Joined: 5th Nov 2004

Gallery: 28 images

Ride: 351 Vogue,XH 5.0,'17 5.0 Stang

Location: Perth
WA, Australia
That's why I said the tacho itself could be stuffed...the other things are just possible problems.
Top
 Profile  
 
 
One Drone
 Post subject: Re: strange tacho happenings.
Posted: Thu Jan 20, 2011 10:41 pm 
Getting Side Ways
Offline
User avatar

Age: 38

Posts: 2450

Joined: 5th Nov 2004

Gallery: 1 images

Ride: NL V8 Fairlane

Location: Sydney
NSW, Australia
If you can get to it, I am not sure how many ground points the cluster uses but I'd check each one referenced to a known good ground point. However as XR9UTE said, if other gauges are not affected or fluctuate at all then it could possibly be the tacho itself.

 

_________________

There are 10 types of people in this world.
Those who know binary and those who don't.
Top
 Profile  
 
Display posts from previous:
Sort by  
Post New Topic Reply
 Page 1 of 1  [ 8 posts ] 
Jump to:  

Home » Forums » Fordmods Tech » V8 Workshop

Who is online

Users browsing this forum: No registered users and 45 guests

You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot post attachments in this forum

 

 

It is currently Wed Dec 25, 2024 12:01 pm All times are UTC + 11 hours

 

 

(c)2014 Total Web Solutions Australia - Australian Web Hosting and Domain Names