|
Actually 1995 are OBD2 with a compression of 9.6:1 ment for 91 octane at 20BTDC. If your using 91 at 20btdc that isn't your problem, unless your plugs and wires exceed over 30,000. "Typical situation"
If you have what is more of a pinging and rattling that sounds as if it comes from the front of the head that would be the 2 top timing chain guide tensioners. Nissan actually has mandated/recalled that the 2 top tensioners are faulty and can break. This will also mean the addition of a new timing chain, do to the fact nthat the chain can stretch sooner than later from glidding along the cam sprocket teeth. This problem usuall starts to occur in the KA24de at about 60,000 to 100,000 depending on how much high rev abuse the KADE has been through.
There is another condition that if it comes from anywhere else in the head you may have what are called floating valves but that sound you usually can't hear until about 3000RPM......
|