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Old 09-19-2005, 02:11 PM   #1
Pat L.I.
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Default coil pack install?

ive been searching here and on scoobymods.com to find a writeup on installing a coil pack but have had no luck.

Is it straight forward? unbolt the coilpack and unplug the harness attached to it? bolt in new coil pack?

when purchasing a new coil pack does it replace the harness aswell? or do i just plug into the existing wiring harness.
any help is appreciated.
Pat
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Last edited by Pat L.I.; 09-19-2005 at 02:19 PM.
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Old 09-19-2005, 02:52 PM   #2
abosworth
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You got it man. It is as simple as that. Just unbolt it then unplug it from the wire harness and install the new one. The coil pack does not come with a new harness. It takes like 4 minutes to do the job.

good luck..

Adam
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Old 09-19-2005, 03:34 PM   #3
Pat L.I.
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thanks alot
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Old 09-20-2005, 10:24 AM   #4
Pat L.I.
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ok another question, please bare with my lack of knowledge on this. Before i just go ahead and replace the coil pack im going to test it. I got my hands on an Ohm Meter. and i have a pdf from end wrench that i found on ravens blade.
http://www.northursalia.com/t...rical/coil.pdf

the above pdf does not mention disconnecting the negative battery terminal.
do i just test primary and secondary with the battery connected?
i do not think the ohm meter that i have supplies power, just reads it.
any help is greatly appreciated before i fry something!
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Old 09-20-2005, 10:28 AM   #5
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An ohm meter always supplies power. To measure ohms, the meter measures the resistance to current flow.. by providing it's own current. It's for this reason that you should never test an airbag system by using an ohm meter unless you know exactly what you're doing. There have been quite a few technicians who've lost their head making that mistake.

Voltmeters & Ammeters do not provide any current.

If you've got a multimeter, the ohm setting will provide current while the volt & amp settings will not.
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Old 09-20-2005, 10:39 AM   #6
Pat L.I.
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thank you, i do infact have a multimeter.
and therefore i should disconnect the battery to perform this test?
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Old 09-20-2005, 10:45 AM   #7
Calamity Jesus
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Well, since you're testing the coil through the connector, the connector will be unplugged. Other than some grounding through the manifold, there should be no other way for current to get to the coil, so you should be safe leaving it connected. It never hurts to disconnect the battery when you're doing something under the hood, though.
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Old 09-20-2005, 01:35 PM   #8
Pat L.I.
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Anyone have a factory service manual handy?
i read 13.55 across terminals 1-2
and 13.36 from 3-4

the pfd that i have states that it should read between 21 +- 15% (3.15)


when testingh the harness i assumed from left to right the plugs were 1,2,3,4

between 1 and 2 i read 2.6
between 2 and 3 i read something like 10.xxx
the pdf that i have states it should read .69 +- 10%

so either i have completely no idea what im doing! my meter is not calibrated correctly, or i have a bad coil pack or harness?
ughhh... calling the dealership. i want to see them perform this test for me.
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Old 09-20-2005, 03:39 PM   #9
Pat L.I.
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Ok just got back from the dealership. Looking at an 02 service manual it states that the resistance should measure 12.xx +- 0-3 between terminals 1-2, 3-4
so it looks like my coil pack is fine.

although it states that it should read around .73 for 1-2 and 2-4 on the harness that plugs into the coil pack. mine reads 2.6. im not sure that this is a problem? and they said they have never seen an issue with wiring.

does anyone with an 02rs have a multimeter to measure the resistance in the harness and see what you come up with?

with that said. they tried to reflash my ecu with the subaru select monitor. but i already had the up to date software so that couldnt go any further.

i have also noticed that since resetting my ecu a few times. the problem seems to go away. but then comes back within a few days.
EVERYTHING HAS BEEN REPLACED fairly recently. 02 sensor, pcv, plugs/wires TWICE!, fuel filter. The only thing i havent replaced is the knock sensor. but i would be getting a cel if that was failing correct?
ARGHHH
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Old 09-20-2005, 04:04 PM   #10
Pat L.I.
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oops ive been testing the harness incorrectly. Supposed to test the port on the coil pack itself. not the wiring harness.
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