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Intermittent and light
- Thread starter jlee
- Start date
Zingari
Brands Hatch
- Joined
- 25 Oct 2009
- Messages
- 14,397
Probably dirty contacts on the impulse readers on the axle sometimes due to heavy brake dust. Have a look there first.
Abs problems can be a minefield on these going by others reports - I think Boxsey had a particular issue that took some tracing :dont know:
Also reports that ABS can be disengaged even with no warning light so you don't know its not working
Abs problems can be a minefield on these going by others reports - I think Boxsey had a particular issue that took some tracing :dont know:
Also reports that ABS can be disengaged even with no warning light so you don't know its not working
Zingari said:Probably dirty contacts on the impulse readers on the axle sometimes due to heavy brake dust. Have a look there first.
Abs problems can be a minefield on these going by others reports - I think Boxsey had a particular issue that took some tracing :dont know:
Also reports that ABS can be disengaged even with no warning light so you don't know its not working
Indeed I did! My symptoms were the ABS light coming on just after I'd moved off. This is caused by a speed sensor on one of the wheels not working. Could be dirty or could be dead. Should have been easy to trace. I traced it to the correct wheel and replaced the sensor with a new one but the problem remained. After a lot of head scratching I eventually found out that the new sensor I had put in was also dead! Changing it again with a good one finally fixed it.
Hi
It sounds like a faulty speed sensor to me. I had similar symptoms on my 993. If the sensors are the same metal bodied ones then it may be very difficult to get the old ones out. The new ones are plastic bodied so they do not corrode and stick in the hole. And the bolt holding them in will probably shear.
I have done the job three times on my 993 and every time it was a drill and blowtorch job. In fact you cannot drill the crystalline magnetic core of the sensor, it is far too hard and shatters. You break the head off the sensor trying to pull and twist it out. Then drill the plastic around the remains, and then torch it till the plastic melts and you can pull the core out.
Then you collapse the metal body away from the wall of the hole into the centre where the core used to be.
If you can get a specialist to diagnose which sensor it is and change it for reasonable money then do.
Best of luck
Berni
It sounds like a faulty speed sensor to me. I had similar symptoms on my 993. If the sensors are the same metal bodied ones then it may be very difficult to get the old ones out. The new ones are plastic bodied so they do not corrode and stick in the hole. And the bolt holding them in will probably shear.
I have done the job three times on my 993 and every time it was a drill and blowtorch job. In fact you cannot drill the crystalline magnetic core of the sensor, it is far too hard and shatters. You break the head off the sensor trying to pull and twist it out. Then drill the plastic around the remains, and then torch it till the plastic melts and you can pull the core out.
Then you collapse the metal body away from the wall of the hole into the centre where the core used to be.
If you can get a specialist to diagnose which sensor it is and change it for reasonable money then do.
Best of luck
Berni
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