When I start the engine and leave it running for a few minutes, when I open the throttle, the revs will only pick up very, very slowly then suddenly burst into life. This happens whether the engine is hot or cold, in gear or in neutral. If I keep "blipping" the throttle, it will respond straight away.
I have tried running run with the fuel cap off in case of a blocked breather and also stopping and immediately restarting does not clear the problem. A new lift pump was fitted last year (for an unrelated problem) and made no difference. (Note, there is no day tank)
All the filters have been changed, fuel and injector pipes on the engine cleaned out and the main fuel lines cleaned out. The fuel is not contaminated.
There is no discernible pattern to this behaviour and has done it on and off for a couple of years. Sometimes it can go for months running fine.
As you can imagine, stopping can be a worry!
Secondly, can anyone advise as to how to adjust the tickover speed.
Any advise gratefully received.
Many thanks.
Tony
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