What is your question?
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What is your question?
coming from store car started missing so I replace the spark plugs and valve cover gasket since I seen an oil leak after completion it was missing more after taking it around the corner it back fire.

if check engine light is coming on, you may need to clean out the Part Load Breather...part (hose) cost around $20. You can do the work yourself in about an hour...the Jag dealer will charge $300 or much more.
but no check light came not at anytime