It's been back with garage sine 09:00 last Thursday. Obviously difficult for them as fault only really evident cold so they loaned me a Picasso to give them a few mornings to try mine after it's not been run for 14hrs.
Spoke to proprietor who flatly denied pump timing could be wrong. He asserts engine would either not run or be permanently rough, not just on start.
I'm doubtful because this engine, although IDI, has an ECU measuring stuff like throttle position, air/coolant temperature, airflow, crank position, speed and injector lift on No1 cylinder. It can thus advance or retard the pump timing via a solenoid to maintain emissions.
I just wonder if that mechanism could adjust the timing enough to compensate for the manual setting at the belt/pump sprocket being out by say 2 teeth. It would then start rough but even up as the solenoid moved in relation to ECU commands.
Haynes has a specific check on fitting of new belt to ensure any slight movement of the pump sprocket to line up with belt teeth is in only one direction only and no more than one tooth. There are right/wrong drawings to illustrate this.
Today they were replacing a manifold gasket but I cannot see that being problem as manifold is at atmospheric pressure, at least when engine is stopped so no chance of affecting injection etc nad thus giving roughness or smoke.
Last edited by: Bromptonaut on Tue 29 Apr 14 at 19:34
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