I have a 2003 jaguar s-type -r 4.2 supercharged with 110k miles, I have replaced the valve cover gaskets, with the spark plug tubes, I have put new spark plugs in they where 11$ a spark plug, I have bought 8 brand new coils, installed them, and the car keeps missing when its cold it will not even move when stated cold it shakes and turns off, after the car is a little warmed up it will run just fine, I do have two bad 02 sensors I have but have not installed them, do you guys know what the problem could be , I do run premium gas in it.

 

po300
po301 cylinder1
po302 cylinder2
po303 cylinder3
po304 cylinder4
po305 cylinder5
po306 cylinder6
po307 cylinder7
po308 cylinder8
p1313
p1314
p1316
po037
p1647
p1000

 

Were they the correct plugs, coils and if fitted O2s?

I think you have the worst set of codes I've seen in 5 years. Something is very very wrong.

 

as far as I know everything is correct but the car runs so smooth after it runs for 3 minutes

 

NGK IX Iridium plugs

 

Don't sound right. Should be IFR5N10. Yours may be OK for all I know, though. I guess the gap size would matter...

 

NGK IX Iridium/Spark Plug (5464) | AutoZone.com

 

it could be a coolant temp sensor

 

Sounds like a connection problem? With all 8 cylinders giving codes you need to look at things that are common to all cylinders. Like the fuel injection harness. Take the plugs apart and reseat them. Also check the grounds and clean and re-tighten them.

Are you clearing the codes after you read them? You have so many that you need to start over from scratch.
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You need to be SURE that the spark plugs have the right gap. They will be very small since the supercharged engine, like a turbo engine, can't run with large gaps. The increased pressure in the cylinders suppresses the spark.


Stop using fancy plugs.