Purchased new, 1996, SW1, 5sp manual, 310000km. no ses light (previous intermittent ses light problems solved by changing fuel cap)
Car starts and runs fine, no other problems noticed. Fuel consumption rate may? be very slightly increased (not obviously excessive) but it is hard to tell as consumption is usually slightly higher in winter.
At start-up, the engine initially runs at ~15-1700 rpm for 10-20 seconds before reducing to regular idle speed.
When car is stopped, and engine is warm, if engine speed is increased to
+2000 rpm and then throttle is closed, the engine is slow to return to regular idle speed.Throttle linkage and return springs checked, OK.
I have never used intake or injector cleaners and have never needed to work on intake or fuel system other than fuel and air filter changes.
Could this be a dribbling or leaking fuel injector? Warm engine idle is smooth.
TIA