Hi All

Had this in for a service a few weeks ago and did the plugs on it put in NGk and changed the manifold seals, a week or so later customer brings back with the eml on, check codes and showed P0171 system too lean bank 1, reset code and checked for air leaks found split pipe and changed.

A week later customer comes back with the light on again, he says that it only came on after a run then leaves it and when restared it sort of misfires with a hesitation then suddenly clears and will be ok for a while, has any one ideas.

Steve