92 XJ AW4 210,000 miles.
Engine power does not increase above about 2250 rpm. On the slightest incline I have to floor it, but it does no good. No increase in acceleration with throttle position or rpm. Its as gutless at 4,000 rpm as it was at 2000 rpm. It simply wont accelerate.
I did a compression test. Engine warm (not hot), throttle held open, 10 strokes.
1 152
2 135, 146, 148
3 157
4 146
5 152
6 158
After testing all 6 cylinders I went back and tested #2 two more times and got the higer readings. Motor is good internally based on compression test.
I have read dozen or so similar threads. Suggestions were TPS, Fuel Pump, Injectors, Fuel Filter, 02 sensor, and clogged Cat. All but one thread ended with no solution found. The one that had a fix said it was a clogged Cat.
I am going to do a normal tune up tomorrow (plugs, wires, cap, rotor) since its been about 80Kmi and I will toss in an 02 sensor for good measure since its the original unit.
Anyone who has seen this problem and fixed it pleas post up.
I would also like to know how test injectors and TPS.
Thanks
John
Engine power does not increase above about 2250 rpm. On the slightest incline I have to floor it, but it does no good. No increase in acceleration with throttle position or rpm. Its as gutless at 4,000 rpm as it was at 2000 rpm. It simply wont accelerate.
I did a compression test. Engine warm (not hot), throttle held open, 10 strokes.
1 152
2 135, 146, 148
3 157
4 146
5 152
6 158
After testing all 6 cylinders I went back and tested #2 two more times and got the higer readings. Motor is good internally based on compression test.
I have read dozen or so similar threads. Suggestions were TPS, Fuel Pump, Injectors, Fuel Filter, 02 sensor, and clogged Cat. All but one thread ended with no solution found. The one that had a fix said it was a clogged Cat.
I am going to do a normal tune up tomorrow (plugs, wires, cap, rotor) since its been about 80Kmi and I will toss in an 02 sensor for good measure since its the original unit.
Anyone who has seen this problem and fixed it pleas post up.
I would also like to know how test injectors and TPS.
Thanks
John