Any spark-plug readers in the house? |
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Any spark-plug readers in the house? |
SirAndy |
Apr 10 2010, 08:47 PM
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#1
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Resident German Group: Admin Posts: 41,688 Joined: 21-January 03 From: Oakland, Kalifornia Member No.: 179 Region Association: Northern California |
Do these look OK?
I haven't been reading spark-plugs since my dirt bike racing days. On my bike, those would have indicated a slight lean condition. (IMG:style_emoticons/default/idea.gif) What about a 993 3.6L motor? Still too lean? Or OK? (IMG:style_emoticons/default/confused24.gif) Andy Attached image(s) |
ChrisFoley |
Apr 11 2010, 05:24 AM
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#2
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I am Tangerine Racing Group: Members Posts: 7,937 Joined: 29-January 03 From: Bolton, CT Member No.: 209 Region Association: None |
Unleaded fuel doesn't provide the same distinct color comparisons on spark plugs as the old leaded fuel did. As Messix noted, aluminum deposits and erosion are important telltales though.
We had some of the plugs out of the 3.6 in our shop last week and they looked much as yours appear. Have you put a scanner on the OBD2 to check for fault codes? Do you have the stock ECU chip or an enhanced performance chip? The performance chip in the car we have here tries to keep the AFR around 13.0 +/- 0.2, but the engine was lean and pinging at moderate load/low rpm until we replaced the O2 sensor. |
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