I have a 205 Rallye with a Kent PT 02 cam in a LAD head and a webber 28/36.
When driving there is a flat spot on the first choke, runs fine at full chat. When pulling away the revs dip into the flat spot and then you hit the throttle and it takes off. Impossible to drive about town. (not what I bought it for but you feel a bit dumb thrashing away from every set of lights at the age of 52)
I have cleaned the carb and blown through every hole I could find. No Change.
Put it on a timing light, steady on idle. It picks up to about 1500 revs and then all hell breaks loose with timing jumping. If you open up further it settles down again and you see the advance kick in.
Pulled the distributor off for a strip and inspection, both springs present and correct on the advance. Coil pack to distributor cable looks a bit rough but does not seem to fit the symptoms.
Has anyone seen a faulty distributor do this or is it more likely the wrong distributor advance curve.
Thoughts anyone?