rev counter erratic behaviour
#1
09-20-2006 | 08:56 PM
Thread Starter
Joined: Sep 2006
Posts: 1
rev counter erratic behaviour
Hi I wondered if anyone can solve a problem with my X reg a3 tdi. The rev counter will change as the revs change but it wont always go back to zero and will even go all the way round past 5000 revs. It is fairly erratic sometimes going back to normal but usually doing what it wants to... Has anyone any ideas? Any help would be much appreciated
#2
09-20-2006 | 09:05 PM
Joined: Nov 2005
Posts: 12,826
From:
RE: rev counter erratic behaviour
FLUCTUATING, EXCESSIVE IDLE SPEED
AFFECTED MODELS:
All vehicles with Bosch Motronic fuel injection system.
FAULT:
Fluctuating, excessive idle speed - engine starts after charging the battery.
CAUSE:
If the battery is disconnected or discharged the Motronic control units lose their programmed and stored basic adjustments.
SOLUTION:
When starting the engine after the battery was discharged or disconnected, switch on the ignition for approx. 10 seconds and then switch it off again. This makes sure that the old adaptation values are deleted and stored again in the control unit. After this the engine starts without problems and the above symptoms do not occur again.
INCREASED IDLE SPEED
AFFECTED MODELS:
All vehicles with Bosch Motronic fuel injection system.
FAULT:
Fluctuating, excessive idle speed - engine starts after charging the battery.
CAUSE:
If the battery is disconnected or discharged the Motronic control units lose their programmed and stored basic adjustments.
SOLUTION:
When starting the engine after the battery was discharged or disconnected, switch on the ignition for approx. 10 seconds and then switch it off again. This makes sure that the old adaptation values are deleted and stored again in the control unit. After this the engine starts without problems and the above symptoms do not occur again.
INCREASED IDLE SPEED
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