Wondering if anyone out there has had this problem. I have a 1979 X1/9 with a 1500. The engine runs strong except when it is warm (choke off), the car tends to idle very slow. If you raise the idle by the carb adjustment, it revs too high when cold. I checked the timing and it seems OK. I also checked the valve clearance and it is good as well. I thought that the valves were involved since the car seems sort of delayed with respect to the gas pedal response. The last symptom that I believe is related is that the car has a knocking sound when under acceleration. This knock must be from the intake or exhaust as it is not on the exterior of the engine. I have a spare 1300 engine and thought that I will swap the heads to see what happens but I would really like to know what the problem is before I start messing with this.
Any ideas would be much appreciated.
Thanks
Any ideas would be much appreciated.
Thanks