The General
Well-known member
- Joined
- Oct 3, 2012
- Messages
- 54
- Reaction score
- 0
- Location
- Cincinnati, OH
- My Car
- 72 Mach I (Wrecked & Sold)
72 Q Convertible (The General)
351C Q code Vert - Auto, 85K miles. Don't believe it has been rebuilt. The car seems to be pretty original including the points. (Really, don't want to debate this at this time.)
Looking for advice on what to do next. I have a engine vibration > 2500 RPM. I have put the car in neutral and park and confirmed that vibration is in just the engine. I have checked the motor and transmission mounts and these seem to be ok. I looked at the harmonic balancer and did not find anything wrong, however I do not know what indicates a bad one. I also removed all of the belts - vibration still exists.
I have purchased and older Alltest Engine analyzer a few months ago and have been able to get it working and bring it to good use. I will include some of the data from the tests. I want to know what should the points voltage be at higher RPMs? And if I can believe the analyzer saying the cam is worn.
Last year I messed with the idle, carb and points thus making the car run poorly. It stemmed from bad timing. The distributor was stuck so after three weeks of patience and work I got it to break loose. I readjusted everything and ran the Alltest analyzer with the following results:
Power balance between cylinders looks relatively even.
Vacuum at 830 rpm 15.6, @ 2700 RPM 20.7 in Hg
Points voltage 830 rpm: .28V @ 2700 2.04V (analyzer says "high")
Coil voltage 830 rpm: 7.25 V @ 2700 9.38 V
Battery: 14.05 V and 8-11 amps
Dwell @ 830 RPM: 29.7, @2040: 24.5 @ 2561 23.8 degrees
Altest Anaylyzer flashes " WORN CAM" at higher RPMS
The firing test and snap Kv test would not work > 2500 RPM - the analyzer "looses signal". Not sure why...
So to sum it up. I am trying to solve the engine vibration issue > 2500 rpm. Not sure if it is the points or the cam as indicated by the analyzer. Is there another test I can do? Any suggestions would be helpful. THANKS - Eric
Looking for advice on what to do next. I have a engine vibration > 2500 RPM. I have put the car in neutral and park and confirmed that vibration is in just the engine. I have checked the motor and transmission mounts and these seem to be ok. I looked at the harmonic balancer and did not find anything wrong, however I do not know what indicates a bad one. I also removed all of the belts - vibration still exists.
I have purchased and older Alltest Engine analyzer a few months ago and have been able to get it working and bring it to good use. I will include some of the data from the tests. I want to know what should the points voltage be at higher RPMs? And if I can believe the analyzer saying the cam is worn.
Last year I messed with the idle, carb and points thus making the car run poorly. It stemmed from bad timing. The distributor was stuck so after three weeks of patience and work I got it to break loose. I readjusted everything and ran the Alltest analyzer with the following results:
Power balance between cylinders looks relatively even.
Vacuum at 830 rpm 15.6, @ 2700 RPM 20.7 in Hg
Points voltage 830 rpm: .28V @ 2700 2.04V (analyzer says "high")
Coil voltage 830 rpm: 7.25 V @ 2700 9.38 V
Battery: 14.05 V and 8-11 amps
Dwell @ 830 RPM: 29.7, @2040: 24.5 @ 2561 23.8 degrees
Altest Anaylyzer flashes " WORN CAM" at higher RPMS
The firing test and snap Kv test would not work > 2500 RPM - the analyzer "looses signal". Not sure why...
So to sum it up. I am trying to solve the engine vibration issue > 2500 rpm. Not sure if it is the points or the cam as indicated by the analyzer. Is there another test I can do? Any suggestions would be helpful. THANKS - Eric
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