Regarding cleaning: use brake cleaner and all the oil will be off in seconds.
Regarding the engine issues, is your timing right? There is a special procedure for setting up the timing tensioner, is J aware of it? If he just bolted the tensioner without following the pin procedure (plenty of info here about the proper timing procedure for the 1.7 engine) the engine could be out by some small margin and work rough
Regarding the engine issues, is your timing right? There is a special procedure for setting up the timing tensioner, is J aware of it? If he just bolted the tensioner without following the pin procedure (plenty of info here about the proper timing procedure for the 1.7 engine) the engine could be out by some small margin and work rough