Right, the old touring died this morning, the cold knocked the battery out just a day after I was discussing with the other half that it may not see its way though this winter. Its been lazy starting for a few days now. Anyway, long story short, I put a new battery on it.
Now, when the weather was cold last year this car developed an issue of sporadic idling and stalling if the power steering was locked, which wasn't handy swinging it right around mini roundabouts. The issue seemed to quieten down once the weather warmed up. Although sometimes when I had the car and was booting it say down a sliproad, it would feel as though the engine speed was increasing in stages, like there was a distinct light pause every 1000 rpm or so. This has continued throughout this year but as I don't drive it much and she rarely takes it over 45mph, its not concerned me.
What has concerned me was the battery letting go today and stranding her in her heavily pregnant state. So we've fixed that now but the old problem appears to have returned with a vengeance.
Today, I stalled the engine by pumping the brake quickly, the revs settle to around 500rpm cold and moving in 1st in slow moving traffic is virtually impossible as it kangaroos all over the shop, and of course, locking the power steering drops the revs stupid low and just as they are too low to keep running, it manages to pick them back up.
Warm, a lot of these symptoms weaken and the revs settle at either 800 or 1000 rpm. However, reversing the car into a space and braking will cause the engine to almost die, managing to recover pretty much immediately.
My immediate thoughts is a faulty temp sensor, is there a separate one for the gauge? Or possibly the idle control valve but as the idle revs seem to remain consistent I doubt its this and its being affected by a faulty reading from elsewhere.
So, is there any other ideas or common issues out there?