My 87 accord lxi (fuel inj- hatch back) is having pinging problems at low speed ~ 20 mph (pinging goes away
at high speed). I found vacuume in both of the vacuum hoses (#12 and # 15) supplying vacuume to the vacuume
advance diaphram (of the distributor). I can not adjust the timing as per manual (even though i move the distributor).
The Camshaft cover is also leaking oil (may be due to mismatch timing).
Any suggestions ?