: speedometer is lieing



tonymalva
12-06-09, 08:06 AM
1995 Fleetwood brougham speedometer lies a lot(90kmh= 120kmh). when gearbox is on parking and the engine is running,pushing accelrator pedal changes speed on the dashboard 6-10 mph.its weird sorry for my bad english



fleetwood owner from Estonia

tonymalva
12-06-09, 09:40 AM
sorry lying not lieing:)

Stingroo
12-06-09, 12:07 PM
Do you have the stock wheels on it, or have they been replaced with others that are a different size?

sven914
12-06-09, 01:48 PM
Incorrect tire size would not cause the speedometer to change when the car was in park (if that is what you meant).

If you have a digital speedometer, then it may be getting interference from the ignition coils.

tonymalva
12-06-09, 02:10 PM
to sven914:yes i mean that what you have been saying.can i check it somehow if there is problem like this?

Stingroo
12-06-09, 02:18 PM
Ah, I didn't catch the part where he mentioned it being in park. My bad.


And yeah, he's got a digital speedometer. Could there be a trouble code referencing this?

creeker
12-06-09, 03:54 PM
1995 Fleetwood brougham speedometer lies a lot(90kmh= 120kmh). when gearbox is on parking and the engine is running,pushing accelrator pedal changes speed on the dashboard 6-10 mph.its weird sorry for my bad english



fleetwood owner from Estonia

Dont worry about your english,your doing fine, there's probably not too many people here that know estonian.

sven914
12-06-09, 04:38 PM
to sven914:yes i mean that what you have been saying.can i check it somehow if there is problem like this?

I'm not an expert on 93-96 Cadillac electrical systems. There are other members who can help you more.

I do know that interference is caused by loose electrical grounds. So if you can find an electrical diagram of your speedometer, you might be able to find the loose ground.

Stingroo
12-06-09, 05:55 PM
I should have brought my FSM from home with me... I could have scanned him some pages.

If nobody else does, I can do that next week at least....

tonymalva
12-07-09, 12:44 PM
I have already ordered service manual on CD .hopefully i get it next week:)