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Power Strokes
94-97 Tech
Compression test procedure
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[QUOTE="onebad7.3, post: 113464, member: 2295"] 1. Yes 2. The thread is M10x1.0 3. I crank it 5-6 times to get a good reading. 4. You should be around the 400 psi mark. If your anywhere from 365ish and above you'll be ok. As long as the lowest reading is within 75% of the highest reading. 5. As long as the gauge goes to 500 you'll be fine. When you pull the glow plugs out, don't let oil run into the cylinder. It will make your numbers a tad higher than what they are. I'd used a little compressed air to blow the oil away from the glow plug. I have another truck with jumper cables on the truck i'm testing, so the batteries won't get run down. Cranking fast at first and then slower and slower can give you lower readings. [/QUOTE]
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Compression test procedure
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