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I have an 03 discovery That's throwing the codes
1590
1300
0304
1319
0134
It is missing right on start up and will flash the check engine light. It didn’t start missing till I changed the plug wires due to me ripping one out from inspecting my spark plugs. After I changed the plug wires the misfires started. The spark plugs look to be in working condition and I checked to see if I’m getting some kind of spark at them cylinders and I was. Any suggestions would help?
 

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Are you sure that you put the correct plug wires on the proper posts of the coils? Sounds like at least one is on the wrong post. Remember the pic demonstrating which wire goes to which post is backwards as it shows it from sitting in the driver's seat. Lots of folks get this backwards.

Or it could be that you do not have the wires completely seated on each post of the coils.
 
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