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Discussion Starter #1
Ok.........I won't bore you with all the letters and words that connect these items....

2003 Santa Fe 2.4

GF calls SMC says car won't start can you take me to work.

I find the battery terminals are loose.
- tighten
- good

Cars been running rough
- change spark plugs
......
-runs but misfire.
-correct spark plugs

Replace two coil packs with tails
Replace two coil packs under controllers
-same problem, runs but rough and misfire.

(Meaningless swapping things around)

(Sudden realization)
Oh duh. I have 1 and three wired backwards.
-switch
-car starts, runs smooth

"Yeah!!!!!!"

(Ok, old spark plugs in motor, lets put the new ones in and be done with this.)

-change spark plugs

Cranks, but won't turn over now.
-replace with old spark plugs
-same
-no spark now
-put allllll new coils on
-same
 

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543 Posts
Ok.........I won't bore you with all the letters and words that connect these items....

2003 Santa Fe 2.4

GF calls SMC says car won't start can you take me to work.

I find the battery terminals are loose.
- tighten
- good

Cars been running rough
- change spark plugs
......
-runs but misfire.
-correct spark plugs

Replace two coil packs with tails
Replace two coil packs under controllers
-same problem, runs but rough and misfire.

(Meaningless swapping things around)

(Sudden realization)
Oh duh. I have 1 and three wired backwards.
-switch
-car starts, runs smooth

"Yeah!!!!!!"

(Ok, old spark plugs in motor, lets put the new ones in and be done with this.)

-change spark plugs

Cranks, but won't turn over now.
-replace with old spark plugs
-same
-no spark now
-put allllll new coils on
-same

Are you using Hyundai wires? If not I HIGHLY recommend you start with getting some and see if your problem clears up.
 

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AC Delco from Autozone.
Sometimes other manufacturer's wires cause issues. Try your old wires and see if it starts up. If it does then you know it's the wires.
 

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Discussion Starter #7
Still no luck. We are getting voltage to the ignition coils, but no spark. We have even replaced the coils and still no spark. What is the proper voltage to the coil itself? We are getting 3-5 on the low side and 8-9 on the high side. Is that what we should be seeing?
 
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