1.8 16v Mark 4 astra running problems (common) ?

[wduk2005]

Hi my girlfriends car had been playing up a bit (1998 1.8 16v), the revs on tickover go up and down constantly and each day end up a bit lower which has now caused it to stall, i took apart the throttle housing and breather pipes and cleaned it up and the revs stayed a lot higher for about a month but its back to where it was now. Also i had it plugged into the diagnostic machine and it said it needs oxygen sensor but now its saying everything is fine.
I dont know if this is related but i know the rev thing is common on astras, does anyone know what it might be, dont really wanna pay out �65 for something that might be fine.

Thanks to anyone that can help and if anyone knows these cars well i got another question just above they might be able to help with.
Thanks

[woodchopper]

A friend of mine has a Daewoo and some are fitted with Vauxhall parts(seriously ! ) - he has had the same problem and it turned out to be the oxygen sensor. I would say if the diganostic is reading the oxygen sensor as faulty then I would say it is.

[wduk2005]

Cheers wood chopper, thats what i'll prob have to do. i know the daewoo lanos is based on the old astra only cos my mums got one.