Hi all, your expert advice is needed!
My cars problem has developed over time rather than overnight so here goes:
The idle speed is erratic about 50% of the time to an extent that it stalls, this is not all the while, as I said 50% of the time there is no problem. Once it as held at about 600 then it stays there with no fluctuation. If I take the revs up high and release the pedal, the revs drop steadily, hold slightly at about 1200 and drop to 600 – sometimes as it drops it drops below 600 and then starts a to and fro until it eventually stalls. Unsure if this is part of it but the ‘engine emission light’ is on constant. Haynes recons that there could be a vacuum leak but I cannot find one, although there is a very soft repeating ‘t’ sound coming from that area. The chain was changed about 15000 miles ago and the car as now done about 69000, there is some rattle but only slight.
Because I do low mileage and had not given it a blast for sometime I added some injector cleaner to the petrol, I got better fuel consumption but it didn’t cure the problem – I have also changed the plugs, air filter and oil – I have also checked to earth and there are no problems?
Performance wise she still holds her own and pulls a 12000kg caravan with little effort
1.8 club, 52 plate, saloon. (reprogrammed 2 years ago due to replacement of airbag ecu and electrical spikes/problems – it was reprogrammed to Si specs not club (not my doing))