E200 probs - ABS light on, 4000rpm cutout

[TaqMan]

Hi All,

I've been lurking around the site for ages, but now need some help....

My E200 124 16v 94reg has developed a few probs.....

1. Abs light came on and stayed on. Then remained off when started next day. A few days later came on and stays on.

2. Just noticed that the idle has deteriorated - typically if stoping at lights it drops to 500 rpm before popping up to 1500 before settling back to 800ish. It has also developed a tendency to stall in the few minutes after starting. However it always starts well at the first turn of the key and in a few seconds of trying.

3. When engine hits 4000rpm it is as if an rev limiter has cut in - feels like a steady missfire, with no power at all drop back below 4000 and it runs fine. Happens in all gears and load conditions.

Known problems - suspect a dodgy lamda sensor. Temp guage doen't work - but hasn't for ages.

So the diagnosis is??

Thanks in advance for any info/help

Taqman

 

[television]

The abs light would indicate that the over voltage relay could be dry soldered.
under the fault condition it will also upset engine running etc.
It is a very common fault If both these things happened at the same time,
tapping the relay when engine running would show the fault.

Malcolm

 

[TaqMan]

Thanks for the reply.

Is the OVP relay a likely candidate for the 4000rpm cutout as well?

Thanks

Taqman

 

[Silver Arrow]

ABS light could be a sender fault. There are rwo connectors under the bonnet for the front, and a connector under the back seat.
If it's the back, it is in the diff and needs careful removal. Also costs a few bob.
Mine did, and I got a proper chap to do the fiddly bits.

 

[Stevie A]

Of what I have read the OVP on the way out has all the symptoms you describe - ABS light, eratic running, idling etc.