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Old 01-10-2003, 07:38 PM
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Post reading spark plugs

Ok guys. I am restoring my Chevelle. And it has a complete rebuilt big block 396. The car is not rolling yet as i am still working on it. It's a mild big block with a 256 extreme energy cam, holley fuel pump that puts out 80 gals per hr, edelbrock performer intake and an electric choke edelbrock 750. All the spark plugs are dry black except 5 and 8 cyl which is normal color. All ignition stuff is new and good. Timing and carb is adjusted correct. what do u think is going on? also no vacuum leaks and all bolts tight.
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Old 01-11-2003, 05:09 AM
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Sounds like your running rich.Hows your float level? You mite need a regulator on your fuel line Quadarjets and such dont like over 4 psi. Heres a site for reading plugs,
http://www.gnttype.org/techarea/engine/plugs.html
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Old 01-11-2003, 06:08 AM
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Poor air distrubution is not that uncommon. That is probably why they are different colors. The only way you can get a true reading is to drive it. Go out, warm it up, do a full throttle run and shut it down immediately. Now check the plugs.

Chris
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Old 01-11-2003, 09:34 AM
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I gotta go with S10 on this one, have you ran the engine much since the rebuild...does it idle well? If it hasnt been run on the street, there is no way the rings are seated yet.
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Old 01-11-2003, 12:04 PM
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thanks for the reply guys. the car will be awhile before it gets out on the road. I am sure the rings are not seated yet. they are federal mogul moly rings and its been done for 3 months and every 2 weeks i start it up to keep it lubricated and it has a nice idle. comp cam 256 extreme energy cam
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Old 01-11-2003, 02:25 PM
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Did you break the cam in correctly? Reading the post, the car hasn't moved as of yet.

[ January 11, 2003: Message edited by: 1BAD80 ]</p>
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Old 01-11-2003, 03:45 PM
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the cam was broken in just not able to drive it though.
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Old 01-11-2003, 03:58 PM
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I agree TurboS10 wait until it can be driven.
You cant get a true reading right now.
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Old 01-12-2003, 08:04 PM
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It's extremaly hard to read plugs on pump gas due to the additives added for cleaner emmissions, Use them only as a guideline.
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