all TS engines and 2.0 JTS use the same VARIATOR SOLENOID. newest part no.: 71736025 many of these are unproperly listed on ebay...
new VARIATOR SOLENOID is about 3 times more expensive than a new PHASE VARIATOR, but you can get it 2nd hand on ebay for abou 40 £.
if the VARIATOR SOLENOID is not working at all, P1653 fault code will flash! but if it does not flash, that does not mean it is working either.
to be sure, turn on the engine, do not accelerate, then plug the VARIATOR SOLENOID directly to battery poles. if engine changes idle, then you got your VARIATOR SOLENOID and PHASE VARIATOR working.
you can also easily remove the VARIATOR SOLENOID to check if the inside metal pin pops out. with it removed, plug a 12V transformer (with at least 1A output) directly to the VARIATOR SOLENOID and the metal pin should pop instantly. if not, it is possible that it is blocked by dry oil caused by lack of usage. clean it with WD40 and try again.
problem can also be caused by blocked oil circuit inside engine, that activates the PHASE VARIATOR, by lack of usage. I would run the engine miles enough until the symptoms are gone. that would hopefully unblock the oil draining holes...
also, the problem could be with the PHASE VARIATOR. I don't promise problem will be fixed if you change it. so, try the other options first, and if you decide to change the PHASE VARIATOR, do it only when you change the time belt.
won't do any harm running with the VARIATOR SOLENOID disconnected or failed. just lack of performance.
Last edited by alfizta; 18-12-13 at 16:26.