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If you mean the spark is yellow instead of blue, that means the coil no longer produces the hi voltage necessary for a blue spark. Replace the coil pack for that cylinder.
I would suggest you go through your entire ignition system. I would start with rechecking the 2 dead plugs for spark. Check all your plug wires for ware and damage check the plugs themselves. The induction wire and im not sure but if you have a distributor check the cap. If you go through the entire spark system and it is getting a good spark you might want to start checking out the engine itself.
Does it cut off quick or losses power first ? If it is quick then i would look at some thing in the ignition starting with crank sensor then dis./co Mogul /coil pack if cant find problem there then test fuel pump pressure using proper gage,if still cant find have scanned,I have heard Autozone does this for free in some parts of the country saving you about 85$ Hope this is some help ,feel free to check back here , let us know how we are doing , Thank you.
Crank position sensor would be my guess. Its located the center, rear engine area, mounted in the block below the ignition
coil pack and DIS module.My guess is that's your culprit.
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