Speedo, 10mph too fast

[bigbob 0]

No idea why my speedo says im doing 60 when im actually doing 50 but it does..

 

It is always 10mph too fast, it isnt that annoying but if theres a simple fix id like to hear it!

 

 

cheers

[vr6storm 0]

No idea why my speedo says im doing 60 when im actually doing 50 but it does..

 

It is always 10mph too fast, it isnt that annoying but if theres a simple fix id like to hear it!

 

 

cheers

 

u still on standard alloys?

[Joe M 0]

Possibly the needle has been removed in the past and not refitted at the right angle?

[Henny 0]

you could always just pull the needle of and re-seat it slightly further around the dial....

 

Open up the clocks, nudge the needle over the end stop so that it comes to rest naturally and mark where it is with a mark on a bit of tape or similar... pull off the needle and then replace it moved a little further back than it was originally... now flick it back over the end stop and put it back in to see if it's closer, of if you've gone too far the other way...

 

Simple and easy to do, just be careful when pulling the needle off so you don't snap it... 8)

[bigbob 0]

on ABT 15" alloys

 

Henny; thanks for that i'll give it a try when its light outside :mad:

[G60Dan 0]

when you stop does it go down to "0"?

[Henny 0]

erm, Dan? UK Corrado speedo's don't have a "0" marker on them... the first one is "10" which is where the end stop is... :wink:

[G60Dan 0]

erm, Dan? UK Corrado speedo's don't have a "0" marker on them... the first one is "10" which is where the end stop is... :wink:

 

So it does! :oops: Something I've never really looked at as you can tell LOL! Thank you for the correction :wink:

[Henny 0]

Actually, I had to check before I hit the post button... :oops: :lol:

[Kevin Bacon 5]

Corrado speedos are quite accurate but the analogue one isn't. I've found the MFA one is more or less bang on with a GPS reading. The Analogue one is generally 3-4mph out to 120 and about 10mph out at the top end of the scale.

 

If it's 10mph out from 10 - 160, sounds like someone's been in the clocks and had a play.

[ben16v 0]

kevhaywire, is there a digital speedo on the MFA??

 

i knew there was a digi rev counter in there somewhere

[jedi-knight83 0]

Corrado speedos are quite accurate but the analogue one isn't. I've found the MFA one is more or less bang on with a GPS reading. The Analogue one is generally 3-4mph out to 120 and about 10mph out at the top end of the scale.

 

If it's 10mph out from 10 - 160, sounds like someone's been in the clocks and had a play.

 

although as i have said before.... my speedo is 10% faster than my gps at all speeds but isnt noticable below 50 mph. i have standard 15" wheels.

 

10mph differeance at 50 mph is a big difference and must mean the needle needs moving...may be worth checking the rev counter is acurate aswell. plug vag com in to get a reading and check what your needle says then

[Reggit 0]

Benji - I assume he means the average speed. Reset it when you're travelling at a constant speed and you'll get a true speed reading until you change how fast you're going.

[Kevin Bacon 5]

Yep the average speed reading.

[ben16v 0]

ah i see :wink:

i`ll have a go later to see how mine compare-avg speed vs needle :)

[Supercharged 2]

I think the diagnostic mode gives current speed???

[Eug 0]

kevhaywire, is there a digital speedo on the MFA??

 

i knew there was a digi rev counter in there somewhere

 

Simple.

 

Turn the ignition to the on (no need to start the car).

Hold down the Trip Reset button and then quickly turn the ignition off and then on again.

Release the Trip Reset.

 

The MFA displays Mode 1.

Pressing the MFA advances fro Mode 1 to Mode 8 and then repeats.

One of the Modes gives you the upper RPM limiter (6100 I think) and one of them is a Display test (Mode 6).

 

Mode 7 is the digital rev counter.

You can then proceed to start your engine.

 

Everything goes back to normal when you switch the ignition off.

[ben16v 0]

thanx

 

i used to know and impressed a few people saying "yeah my 13 year old car has MPG, oil temp, secret modes!!!...... blah blah blah"

 

aint the C ace! 8)

[Rpmayne 0]

Do the later Corrados have the mph, digital revs etc? I remember reading somewhere that this only works with pre '93 cars or something? My speedo is out by about 10mph through the range aswell compared to gps, the top speed and 0-60s i had don't look so good now.

[Kevin Bacon 5]

I thought only the G60 had diagnostic mode?

 

But I'll print it off and try it at lunchtime though!

 

K

 

Turn the ignition to the on (no need to start the car).

Hold down the Trip Reset button and then quickly turn the ignition off and then on again.

Release the Trip Reset.

 

The MFA displays Mode 1.

Pressing the MFA advances fro Mode 1 to Mode 8 and then repeats.

One of the Modes gives you the upper RPM limiter (6100 I think) and one of them is a Display test (Mode 6).

 

Mode 7 is the digital rev counter.

You can then proceed to start your engine.

 

Everything goes back to normal when you switch the ignition off.

[Eug 0]

I thought only the G60 had diagnostic mode?

 

But I'll print it off and try it at lunchtime though!

 

K

 

No mate I've done it with all my VR6's.

 

No digital speedo only digital rev counter.

Useful for checking that idling speed - mine was about 850 ish.

 

Did take a bit of fiddling / hacking though.

Cos the other guide out there tells you to hold down the MFA while switching the ignition off and then on.

 

Eug

[Eug 0]

Just found this on http://www.gti-vr6.net/library/electrical/MFA_tricks.html

 

The 1993 model year and after has a procedure using the odometer reset button instead which then lists the following:

 

Function Function Meaning

number displayed

------------------------------------------------------------------------------

1 - Distance pulse number --- 6010 (Great Britain and USA)

2 - Country code --- 2(G.B)

3 - Speedometer/Tach --- For production only

4 - No. of cylinders --- 6

5 - Segment test --- All LCD segments selected

6 - Pulse from speedometer --- 4 pulses counter per 1 wheel revolution

___ vehicle speed sensor

7 - Engine speed (rpm)

8 - Program version --- same as "3" above