Engine Performance problem
1995 Infiniti J30 6 cyl Two Wheel Drive Automatic 142500 miles
I have an Infinity J30 that after 20 minutes of driving it looses power. It is not a sudden loss of power but
it slowly looses power for about another 3 miles.
While it is loosing power it will not maintain speed nor
will it have power to accelerate. If you leave it sitting
over night it will crank up first time and go for twenty more minutes. Also when it dies you cannot
crank it up. I took it to a local shop and he said that it could be the oil pressure or cam shaft sensor.
Any ideas please help.
Check oil pressure with a mechanical gauge during one of these events.
While a camshaft sensor is possible, it could be verified with a scanner in live data mode during an event, the scanner would display erratic RPM. Also when this event occurs, look at convertor for signs of overheating (red in color).
Other possibilities include a clogged convertor, or ignition module, which sounds more likely than a cam sensor, the symptoms you describe are classic to a bad module.
Most autoparts stores can test modules, call ahead first and check.