Hi



Got my injectors re-balanced for £25 each, the performance has greatly improved, a lot more pull on hills and is overall a lot more responsive -BUT - It's started nailing (pinking) under 1200 revs. The guy who did them said he had set the pop pressure at 160 because after ca 1000 miles the springs will settle back down and allow pop at 130-140 lbs of pressure which is optimal, which could cause nailing.

After a lot of reading and brain picking it seems that having the injectors balanced has highlighted the off timing of the fuel pump and valves, which is a common cause of nailing.

The easy (!!??) thing to do would be to reset the pump and valve timing to compensate for the optimal setting of the injectors. A MB mechanic (over 50 who lends me tools) said that given the age and mileage of my car the chain would have some stretch and renewing the timing chain and tensioner should pull everything back together again. So I ordered a chain, tensioner + seal, sliding rail and three sprocket bolts for £200 and will set about it next week.

Any thoughts or tips on this undertaking



Cheers

Adrian