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More Test Results

April 16, 2009

Ok, checked compression and in doing so checked the coloration on the plugs as well.  Found something interesting.  As seen in the picture album in the following link, plugs 2, 3, 5, and 8 are showing they have been run extremely hot while the others remain normal coloration.  2, 8 and 3, 5 are on opposite banks but on the same dizzy.  Correlation?

spark


(Picture names will tell location and cylinder numbering for the plugs and dizzy)

Cylinder pressures in PSI on cold engine.  All plugs are out and the throttle plate is in WOT position (by the way, cylinder pressure held in key off position):

1 – 170
2 – 170
3 – 175
4 – 165
5 – 177
6 – 165
7 – 175
8 – 175

– Stock Compression Pressure: 178 psi
– Maximum Allowable Variation Between Cylinders: 14 psi

From → Lexus, News, Supra

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