using non-GM spark plug wires?
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Northstar Engines and System Technical Discussion Discussion, using non-GM spark plug wires? in Cadillac Engine Technical Discussion; I was looking for a set of AC Delco spark plug wire set but for some reason non of the ...
  1. #1
    weister42 is offline Cadillac Owners Enthusiast
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    Cool using non-GM spark plug wires?

    I was looking for a set of AC Delco spark plug wire set but for some reason non of the shops I visited had them in stock, so I went to Autozone and picked up some "double silicone" wire set but I ended up returning it cause the guy gave me the wrong K&N air filter . Just today I went to NAPA and picked up their "Belden Max" wires and the lady said they're about the same if not better, and it did cost me about 100 dollars. My car is misfiring right now and I want them changed asap, so should I be concerned about using NAPA parts instead of AC Delco like everyone else here say?

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    Ranger's Avatar
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    Re: using non-GM spark plug wires?

    General concensus is that OEM wires work the best. Best price I found was $122 (shipped) from http://www.rockauto.com. Had them in two days.

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    freefaller07's Avatar
    freefaller07 is offline Cadillac Owners Member
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    Re: using non-GM spark plug wires?

    I was going to get new wires for mine this spring because my seville STS is nearing the 200,000 mile mark. It is running a bit rough and im sure by now new wires and plugs would make a huge improvement. Are AC delco plugs the OEM the best to run in the northstar as well? I wanna buy all the supplies soon and be ready to get my tune up done. Thanks Ranger for the advice on the plug wires.

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    davesdeville's Avatar
    davesdeville is offline Banned
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    Re: using non-GM spark plug wires?

    How come wires are so damn expensive? That's like $15 per wire!

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    zonie77 is offline Cadillac Owners Connoisseur
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    Re: using non-GM spark plug wires?

    What has been said about non-OEM wire is they don't last as long as OEM. If you get premium wires they should have a comparable life but cheaper ones may not last long. If you intend to keep the car the OEM's are worth the money.

  7. #6
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    Re: using non-GM spark plug wires?

    And, if you get a "boxed set" of ACDelco wires, they are "lifetime warranty" just keep your box and receipt I keep a folder forevery car in the file cabinet just for this sort of thing.

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    caddydaddy's Avatar
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    Re: using non-GM spark plug wires?

    Quote Originally Posted by davesdeville
    How come wires are so damn expensive? That's like $15 per wire!
    That's cheap! I was at AutoZone and the guy was showing me this aftermarket OEM style spark plug wires for a VW Jetta. They were $89 for 4!!! The guy said they were pretty cheap looking wires too.

    So Northstar wires are cheap!

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    weister42 is offline Cadillac Owners Enthusiast
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    Re: using non-GM spark plug wires?

    Quote Originally Posted by Ranger
    General concensus is that OEM wires work the best. Best price I found was $122 (shipped) from http://www.rockauto.com. Had them in two days.
    Here's a pic of them on the box it says it gives better protection than OEM and has a limited lifetime warranty that should it failed before the engine does I can get one free. The jacket is pretty slick like those expensive car/pro audio RCA cables, and the features looks pretty promising...the only difference is these are 7mm cable and the AC Delco is 8mm, not sure what does it mean. it's really cold out today so I'm still trying to decide if I should go with these...

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    caddydaddy's Avatar
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    Re: using non-GM spark plug wires?

    "the only difference is these are 7mm cable and the AC Delco is 8mm, not sure what does it mean."

    The thicker wires have less resistance, I'm not sure how much difference 1 mm makes though.

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    Spyder's Avatar
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    Re: using non-GM spark plug wires?

    7 to 8mm will not change resistance...that measurment only tells the thickness of the insulation, not the core. I have those same napa brand wires on my 94 STS and after 10,000 miles, I'm getting a constant miss at cruising speed...not sure if its the wires, but I have a strong suspicion that they are what is causing my annoying problem. Go with the Delcos!!!

  12. #11
    weister42 is offline Cadillac Owners Enthusiast
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    Re: using non-GM spark plug wires?

    Quote Originally Posted by Spyder
    7 to 8mm will not change resistance...that measurment only tells the thickness of the insulation, not the core. I have those same napa brand wires on my 94 STS and after 10,000 miles, I'm getting a constant miss at cruising speed...not sure if its the wires, but I have a strong suspicion that they are what is causing my annoying problem. Go with the Delcos!!!
    Well did u changed the spark plugs while at it? I changed my spark plugs with AC Delco and guess what, one of them was defective and went out in less than 30 miles Costed me 140 dollars for the mechanic to figure that out...after this my car never idled the same...but I think it's the wires so thus the topic post

    I guess what I'm trying to say is are these wires going to rob my power or reliability? I mean they do have a lifetime warranty so I don't think they will just say it for the hell of it, and I always thought OEM parts are unheard of in the high-performance racing scheme.

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    Re: using non-GM spark plug wires?

    Quote Originally Posted by freefaller07
    I was going to get new wires for mine this spring because my seville STS is nearing the 200,000 mile mark. It is running a bit rough and im sure by now new wires and plugs would make a huge improvement. Are AC delco plugs the OEM the best to run in the northstar as well? I wanna buy all the supplies soon and be ready to get my tune up done. Thanks Ranger for the advice on the plug wires.
    Yes, stick with A/C Delco 41-950 plugs.

  14. #13
    outlaw1369 is offline Cadillac Owners Member
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    Re: using non-GM spark plug wires?

    Do the OEM wires for the Northstar have a special resistance to them? Used to be able to put the 8 or 9 mm performance Accel, Moroso, MSD, etc... wires in the old cars as a aftermarket upgrade.

  15. #14
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    M&N
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    Re: using non-GM spark plug wires?

    The "double silcone" from auto zone work just fine and there is not a performance issue but I would stick with the 41-950 plugs though.

  16. #15
    weister42 is offline Cadillac Owners Enthusiast
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    Re: using non-GM spark plug wires?

    Well today I decided to put them in...and yes cured my misfiring problem and it seems to work pretty well(did I mention these wires smell good)! I'll keep an update tho if this wire set fails

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