Scanned for fault codes today after a hiccup at dinner time, and got the 17664 engine coolant temp sensor G62, open or short to plus... Anyway, whilst I was there, I checked a few measuring blocks.. 1st was the syncro angle, normally sits at 0.0cf, but fluctuates between 0.0, 0.6, & 1.1cf, surely this should be fairly stable, not jumping around, everything seems tight and ok. Its had the shakey idle thing since I've had it, maybe a bit more now, bought it at 60k, its now on 112k. There was a fair difference between cylinders on the idle stabilization figures, didn't write them down but think 1 and 4 were zero, 2 and 3 were + / - 1.something... The work run is only 4 miles so probably doesn't help, I'll put a good dollop of injector cleaner in and see how it goes, seems to run ok, still pulls like hell.. Anyway, what about the syncro angle, is this normal.. Also, is the G62 temp sensor the one on the rear of the head, under the tandem pump??