More Plugs Wire Questions

[ghost111]

I have a 1999 V6. I am going to do the plug change ceremony. I have the NGK Blue wires but I would also like to change the 3 'coil' wires [or what ever they are called]
Anybody have a clue as to where I can buy the 'Coil" wires?????
THX

[Nervous]

http://www.toyotapartszone.com/1999/...park-plug.html



Are you talking about 19901C, 19901D, 19901B parts?
These are CORD, SPARK PLUG RESISTIVE, No 1 - 3, OEM## 90919-15308, 90919-15309, 90919-15310.
Check the link above.

[Nervous]

Yeah, and I recommend to buy them from partznet.com (I just like these guys)

[hill8570]

You mean the wires from the igniter to the coil packs? Seems silly -- those aren't high-voltage wires, and aren't any more failure-prone that any of the thousand or so feet of "regular" wire in the rig.

[Nervous]

Oh, those wires! Yeah, I am second that it doesn't make any sense to replace them.

[ghost111]

Originally Posted by hill8570

You mean the wires from the igniter to the coil packs? Seems silly -- those aren't high-voltage wires, and aren't any more failure-prone that any of the thousand or so feet of "regular" wire in the rig.

Yes these are the wires. From the igniter to the coil packs. Ordinarily it would seem "silly" but 2 have some cuts in the insulation and that makes me nervous. But I still don't know where to get them. Or what they are called? THX for any suggestions.

[JohnGD]

Just called spark plug wires. On waste-spark systems you have only 3, the other plugs are connected directly to coils. Get the $36(+shipping) NGK set:

http://www.rockauto.com/catalog/moreinfo.php?pk=278886

You can always check dealer prices and decide from there. Get NGK Iridium-IX plugs as well. Their catalog doesn't show you can use Laser-Iridium with the platinum ground pad in these stinking waste-spark systems.

Originally Posted by ghost111

I have a 1999 V6. I am going to do the plug change ceremony. I have the NGK Blue wires but I would also like to change the 3 'coil' wires [or what ever they are called]
Anybody have a clue as to where I can buy the 'Coil" wires?????
THX

[Nervous]

BTW, why is it called "waste spark system"?

[hill8570]

Originally Posted by Nervous

BTW, why is it called "waste spark system"?

Because two plugs fire simultaneously, but only one of the cylinders is on a compression stroke (other is on exhaust stroke), so only one of the sparks does anything useful, the other is "wasted".

AFAIK, it was a cost-saving measure when they went to distributorless ignitions -- it was cheaper to have half as many coil packs. Hard on plugs, 'tho -- since they're working twice as hard as they should have to.

[JohnGD]

BTW, what does OP mean by "coil wires" Are these not the 3 "NGK Blue" wires mentioned going to the rear bank? Or does OP talk about the front bank coils?

NGK wires (generic info):
http://www.ngksparkplugs.com/product...sets/index.asp

Front bank coils, directly on plugs:
http://www.rockauto.com/catalog/moreinfo.php?pk=479428

[JohnGD]

Also, in the waste spark system, a coil doesn't just fire two plugs at the same time using an identical current flow path.

The waste spark system forms a circuit, going from the coil to the first plug, to the cylinder head/engine block, to the second plug, and back to the coil.

Therefore, one plug fires from the center electrode to the ground electrode; the other fires from the big fat ground electrode to the center electrode! IMO it's just a stinking design.

[Nervous]

Thanks guys for explanations! But there is a benefit of this design: it is much easier to replace spark plugs in the RH bank than on engines with 6 coils (I have both now and I feel the difference).

[ghost111]

Thanks guys but I have created some confusion here. I have plug wires and plugs. What I need are those 3 thin low voltage wires that connect the igniter to the 3 coils on the front bank. Any ideas as to what they are called or the part numbers. THX