after examining plugs......

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Sep 30, 2005 | 05:15 PM

417 Motorsports

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From: Springfield Mo

after examining plugs......

i have noticed that cylinders 1-2 are black 3,4,5,&6 are tan and 7-8 are damn near white.... whats the deal? im still using the 6.0 intake manifold and the motor is stock 6.0. kinda has me a lil worried.....any ideas

Sep 30, 2005 | 05:21 PM

2000 Tran Zam

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From: Ahwatukee, Az

thats very wierd. Does that mean cyl 1-2 are running extremely rich and 7-8 are extremely lean?

Sep 30, 2005 | 05:51 PM

DarkblueTA

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Quote:

Originally Posted by 2000 Tran Zam

thats very wierd. Does that mean cyl 1-2 are running extremely rich and 7-8 are extremely lean?

That's exactly what it means

Sep 30, 2005 | 06:32 PM

2000 Tran Zam

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From: Ahwatukee, Az

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Originally Posted by DarkblueTA

That's exactly what it means

how the hell would that happen?

wouldnt the a/f ratio affect each cylinder the same way? unless theres something wrong with the spark in each of the coil packs possibly.

Sep 30, 2005 | 07:16 PM

DeltaT

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A white plug can also mean it is getting washed with excess fuel.

I would first try a set of new plugs, then take a couple runs and check them.

7&8 usually run the hottest cuz they're in the back of the motor, farthest from the cool coolant. 1&2 get the opposite.

You can try a hotter plug (1 range hotter) in 1&2, whatever value you are running now in 3-6, and a cooler plug (1 range) in 7&8.

If you still have problems, I'd do a compression check and leakdown test. You may have other problems.

Jim