Hey all (sorry it's a long one)
I changed the carburettor on my gf's 1991 driver at the weekend and all seemed to be well until my test drive.
It all started fine so I set off for a little test, put my foot down as I went down the road in my village, went to change from 2nd to 3rd and the throttle had stuck wide open. The revs went through the red by the time I managed to switch the ignition off. Coasted to a stop and hooked the throttle back up with my foot, restarted then carried on. This happened again a couple of times while I was out and the revs had gone into the red before I could change gear and let the clutch back out. The last time it happened the oil buzzer came on, oh cr@p I thought. Pulled over switched engine off, restarted, carried on. A couple of miles later the buzzer came on again, pulled over again then carried on. Got home and greased all the linkages etc, throttle seemed a lot better so went out again. Throttle was a lot better but after 3miles the buzzer came on again, stopped, then another couple of miles it came on again. Managed to get home and the tappets were noisy so it definately had low oil pressure, I'm very worried at this point.
Anyway yesterday we did about an 8mile round trip in it to get some petrol and the buzzer didn't come on at all.
I'm wondering if the oil pump may have been damaged by the excessive revving when the throttle stuck???
As it didn't come on at all yesterday I was wondering if maybe it stirred up a load of sh!t from the sump which partially blocked the pump inlet, which then cleared again over night???
A work colleague has suggested maybe the oil system ended up with an airlock from the high revs which has cleared over night (is this a feasible explanation)
Just wondered what you guys may think as I don't want to do any damage to the engine but unless the buzzer starts going off again should I be worried???
Toby
