- Dec 12, 2011
- 4,656
I put together a short video of the test but didn't go into great lengths on setting anything up. Basically pull the fuel pump relay and spark plugs, one at a time or all of them doesn't really matter, then screw the tester in the plug hole and snug against the O-ring.
Crank the engine for about 5-6 compression strokes and observe the reading, should build fairly quickly and will settle down as shown in the video.
I'm not sure exactly what the specs are for the 4.2 but honestly I thought they may be slightly higher than normal. Nonetheless, there's only about 8 PSI difference from the lowest to the highest so that's a good sign. I'm not consuming any large amounts of oil so I'm fairly certain the cylinder walls have the normal film of oil on them.
Engine was cold, sat outside for 18 hours, throttle closed and nothing added to the cylinders. The angle of the camera wasn't straight on most of the time so the readings were as follows:
206, 205, 210, 205, 204, 202 PSI .... Cyl 1-6
[video=youtube;Zv_fPrIwwHQ]http://www.youtube.com/watch?v=Zv_fPrIwwHQ&feature=youtu.be[/video]
Crank the engine for about 5-6 compression strokes and observe the reading, should build fairly quickly and will settle down as shown in the video.
I'm not sure exactly what the specs are for the 4.2 but honestly I thought they may be slightly higher than normal. Nonetheless, there's only about 8 PSI difference from the lowest to the highest so that's a good sign. I'm not consuming any large amounts of oil so I'm fairly certain the cylinder walls have the normal film of oil on them.
Engine was cold, sat outside for 18 hours, throttle closed and nothing added to the cylinders. The angle of the camera wasn't straight on most of the time so the readings were as follows:
206, 205, 210, 205, 204, 202 PSI .... Cyl 1-6
[video=youtube;Zv_fPrIwwHQ]http://www.youtube.com/watch?v=Zv_fPrIwwHQ&feature=youtu.be[/video]