Hi All,
have had this problem for a wee while now, have spent a bit of time searching (here & generally the net) but have come up with nothing specific to the old Stag.
Here's what happens:
I'll be driving down the road and the speedo will jump about like mad. It does it when the road is smooth and bumpy so I'm not totally sure if it's a loose wire.
When it does settle down it's either 'close enough' (the 3-5% commonly seen) or it's wildly out - like 15% out! (I'll be doing a GPS masured 100kph and the speedo will read 115-120k!)
It's fairly similar to this, however it's never dropped right down to 0, it'll usually only jump around +/- 15km
It's just a bone stock pooh auto 1996 25x, but I'd like to try and sort the issue out. I actually think it might be having an effect on the mileage the ODO reads but I haven't confirmed this.
My avenues of fixing:
1a: Pull the dash cluster, clean the contacts for the plugs/sockets
1b: Pull the dash cluster and resolder everything (do these cars suffer from dry solder joints?)
2: find a replacement dash and see if that fixes the issue
3: plug in an OBD2 reader and see if the ECU is seeing the correct speed (I'm assuming that the speedo sensor feeds the ECU and the dash takes a feed off that wire, or the ECU feeds the dash directly)
Regarding option 3, can anyone recommend a decent cheap OBD2 reader?
Thanks for any help you can give me
