Help Sourcing Ignition Coils - STR
#1
Help Sourcing Ignition Coils - STR
I need some help on finding the best place to get ignition coils for my 03 STR. My understanding is that OEM coils are best, but am curious if there are any alternatives because $900 is steep for all OEM's. So far, this is what I have found via the search function and googl and the BWD's look to be good enough relative to OEM's:
OEM $108: Jaguar IGNITION COIL, COIL-ON-PLUG TYPE. - AJ810445
BWD $78 until Dec 1: BWD/Intermotor Ignition Coil-E1019 - Advance Auto Parts
Various at Rockauto from $35 to $28, quality is suspect for the price.
http://www.gaudinjaguarparts.com/ OEM? is $77
OEM $108: Jaguar IGNITION COIL, COIL-ON-PLUG TYPE. - AJ810445
BWD $78 until Dec 1: BWD/Intermotor Ignition Coil-E1019 - Advance Auto Parts
Various at Rockauto from $35 to $28, quality is suspect for the price.
http://www.gaudinjaguarparts.com/ OEM? is $77
Last edited by rasputin; 12-01-2013 at 05:59 PM.
#2
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rasputin (11-30-2013)
#3
I bought 4 SMP UF519 coils off e-Bay last January,paid $37 each--when they arrived they were genuine Jaguar coils in Jaguar factory packaging!The ad is still there,but I don't what coil you will get now.
I just keep them on the shelf for spares.
I just keep them on the shelf for spares.
Last edited by Six Rotors; 11-30-2013 at 09:44 AM. Reason: correction
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Jumpin' Jag Flash (12-02-2013)
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Jumpin' Jag Flash (12-02-2013)
#5
No faults and no P30X, and after reading several of your posts last night, I am experiencing hesitation or a slight miss under load in 5th or 6th under 1800rpm when I hit the gas slightly hard. Under boost its fine, and at idle its perfect, so I am leaning toward the coil(s) being bad. I also just purchased an ELM327 off of amazon last night, so I will report back with ltft and stft mid next week. Also, the intake from the MAF back has been smoked, and there are no leaks.
I read somewhere there is a tool that can test coils? I haven't done much research on where to buy (ebay?).
I guess my thought process is, if one coil is bad, I should replace them all, because eventually another will go bad and its no fun driving a car that drives less than perfect. It's some serious $$$ to spend to replace them all, but I plan on keeping the car for another 2 years and want to have that piece of mind.
EDIT: car has 64K miles
I read somewhere there is a tool that can test coils? I haven't done much research on where to buy (ebay?).
I guess my thought process is, if one coil is bad, I should replace them all, because eventually another will go bad and its no fun driving a car that drives less than perfect. It's some serious $$$ to spend to replace them all, but I plan on keeping the car for another 2 years and want to have that piece of mind.
EDIT: car has 64K miles
#7
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#8
#9
You can buy a COP tester as JagV8 said (I have one and it's cheap enough to get one anyway) but that will only tell you if the coil is working. What you really want is a coil stress tester which most Ford dealers have.
With the Lincoln LS Ford was replacing way too many good coils under warranty and came out with a recomendation for their dealers to get and use the COP stress tester. It's much too expensive for a home mechanic.
With 64K miles I would change the plugs and fuel filter first. Sounds like you have a very small amount of misfires.
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With the Lincoln LS Ford was replacing way too many good coils under warranty and came out with a recomendation for their dealers to get and use the COP stress tester. It's much too expensive for a home mechanic.
With 64K miles I would change the plugs and fuel filter first. Sounds like you have a very small amount of misfires.
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rasputin (12-01-2013)
#10
Replace the plugs while you are at it.
I took a wait and see approach to replacing all of mine. I'd buy an extra coil pack and keep it until one failed, then I would replace it. It is pretty easy to tell when one fails, but if you want to replace them in one fell swoop then go for it. It takes ~5 mins to replace a coil, maybe a few more to get to the back ones.
I took a wait and see approach to replacing all of mine. I'd buy an extra coil pack and keep it until one failed, then I would replace it. It is pretty easy to tell when one fails, but if you want to replace them in one fell swoop then go for it. It takes ~5 mins to replace a coil, maybe a few more to get to the back ones.
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rasputin (12-01-2013)
#11
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rasputin (12-01-2013)
#12
#13
No faults and no P30X, and after reading several of your posts last night, I am experiencing hesitation or a slight miss under load in 5th or 6th under 1800rpm when I hit the gas slightly hard. Under boost its fine, and at idle its perfect, so I am leaning toward the coil(s) being bad. I also just purchased an ELM327 off of amazon last night, so I will report back with ltft and stft mid next week. Also, the intake from the MAF back has been smoked, and there are no leaks.
I read somewhere there is a tool that can test coils? I haven't done much research on where to buy (ebay?).
I guess my thought process is, if one coil is bad, I should replace them all, because eventually another will go bad and its no fun driving a car that drives less than perfect. It's some serious $$$ to spend to replace them all, but I plan on keeping the car for another 2 years and want to have that piece of mind.
EDIT: car has 64K miles
I read somewhere there is a tool that can test coils? I haven't done much research on where to buy (ebay?).
I guess my thought process is, if one coil is bad, I should replace them all, because eventually another will go bad and its no fun driving a car that drives less than perfect. It's some serious $$$ to spend to replace them all, but I plan on keeping the car for another 2 years and want to have that piece of mind.
EDIT: car has 64K miles
First things first - check the spark wells for any sign of oil or oil residue that is caked on the COP boot. Oil notoriously fries coils over time...
As far as which COP to use - I live by OEM but I would refuse to shell out $900 to replace all 8 especially at 65K miles. I would certainly dig further before shelling out the $$$ and yes, you can have an intermittent failing coil w/o the OBDII throwing a P030X code.
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rasputin (12-01-2013)
#14
Ok you guys knocked some sense into me. I am going to order one coil, and order one of the following testers below - however I need help understanding which one is better. Does anyone have experience with either?
$96
$23
$96
$23
#15
#16
Ok you guys knocked some sense into me. I am going to order one coil, and order one of the following testers below - however I need help understanding which one is better. Does anyone have experience with either?
Amazon.com: Hickok 76562 COP Quick Probe VS: Automotive $96
Thexton THE458 Spark Tester : Amazon.com : Automotive $23
Amazon.com: Hickok 76562 COP Quick Probe VS: Automotive $96
Thexton THE458 Spark Tester : Amazon.com : Automotive $23
#18
I too have an '03 and frankly I'm quite surprised you still have the original COPs in there. I've had to replace mine years ago. The new ones I bought looked slightly different than the original, but new ones only cost $55 for from the dealership. And since half the time they're not in stock when I call, it's a good idea to keep an extra one on hand for the future.
You can try swapping two coils and see if the misfire moves.
You can try swapping two coils and see if the misfire moves.
#19
Well I don't know how long they are supposed to last but my 2005 STR at 96K miles has all the original coils and plugs.
Still runs fine but I do have a new set of plugs and will be interested to see how badly worn my factory plugs are when I replace them. I have no idea if there is any oil in the plug wells but think not since everything seems OK. I do stress test them daily!
For some reason it is much less common for the 2003 and up cars to replace them. Maybe they are just newer cars that have not got to that age yet?
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Still runs fine but I do have a new set of plugs and will be interested to see how badly worn my factory plugs are when I replace them. I have no idea if there is any oil in the plug wells but think not since everything seems OK. I do stress test them daily!
For some reason it is much less common for the 2003 and up cars to replace them. Maybe they are just newer cars that have not got to that age yet?
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#20
Hmmm, .... I didn't know about the older coils being upgraded. But I went into my records and found that Jaguar had replaced all the coils back in '09.
So, the question is: are these the "Upgraded" coils or not?
If so, and they are a bit less expensive now, I'll still make some of mine available at a discount to anyone who might want to save a few bucks.
Good luck to us all!
So, the question is: are these the "Upgraded" coils or not?
If so, and they are a bit less expensive now, I'll still make some of mine available at a discount to anyone who might want to save a few bucks.
Good luck to us all!