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Hi
Owned for 16 years, 176,000 miles, well maintained & engine sweet as a nut. Has intermittent problem of engine suddenly surging at idle - almost cuts out and revs bounce up and down and gradually settles after a time, often occurs after steady cruising on fast roads. Thereafter at low speed, jerkiness is noticeable on light acceleration, or when on light crusing throttle - almost like a flat spot. Symptons can completely disappear for several days. Have replaced lamda sensor, but wonder if ICV or MAF erratic operation. No splits, leaks or other obvious faulty induction pipework. Even tried a few tanks of Shell V Power in case dirty injectors, but engine will always accelerate strongly and smoothly. Thanks for any suggestions.
 
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