Spark Plug change

[r2dillon]

I have updated the computer for Ultrapower and installed a CAI. What is the benefit of replacing the spark plugs, not to mention the plug wires, on fuel consumption?

[r2dillon]

I have updated the computer for Ultrapower and installed a CAI. What is the benefit of replacing the spark plugs, not to mention the plug wires, on fuel consumption?

[JimElliott]

Well it all depends on the milage and condition of the plugs & wires.........

With the new module did the maker state the mods to the plug or anything else?

Jim

[r2dillon]

The coach has 12,000 miles. The plugs looked clean. The computer change was an ultrapower from Brazil's.

[oemtech]

Plugs and wires are a tough one to justify from the stand point of mileage and/or performance.

But, the Taylor wires are 3x larger in diameter than the standard ones and only have 300 ohms per foot (8.1 plug wires are about 1' long). Here is photo of the standard wires and the replacement Taylors. Note - The standard wire I broke during removal.


The standard plugs are AC Delco 41-983 gapped at .060. The recommend replacements are AC Delco 41-932 gapped at .045. Note - Some engines come with Denso brand plugs.


The above photo show a regapped standard plug and a out of the box replacement plug (before being regapped).

Opinion On:
I feel that the wires give a better spark and are less likely to burn, thats assuming you do not have a cooling problem to start with. The colder and regapped plugs give a better spark and are less likely to cause a ping in a slightly lean condition. The dyno might even show a slight increase in horse power that the butt dyno won't.
Opinion Off:

[r2dillon]

Thank you Dale. I was debating whether to invest an additional $200 for fuel savings.

["007"]

Jim_Elliott welcome to irv2 and thanks for joining in.
Enjoy the forums and do post often.

[JimElliott]

With only 12,000 miles on your rig the plugs & wires should be fine without any "mod's"

[JimElliott]

"007" I thank you for the warm welcome.

Jim

[FullAstern]

I just looked at what it would be take, labor wise, to change my plugs and plug wires. It looks like a piece of cake (famous last words). I popped the dog house hatch and everything is right there. I can pretty easily put my hand on both ends of every wire. What I can't get over is the price of the Taylor Extreme plug wires. $150.00 bucks for a set of 8 wires that are the shortest I've ever seen. They all look to be about the same length and all are as short as the shortest plug wire in any set I've ever looked at. I'm sure that's a great thing ignition wise. But WOW! I bet if I strung all 8 wires together, they'd add up to the single longest wire on my old pickup. Yeah, I know, it's quality not quantity...

[r2dillon]

Most of us find that you need to go in through the wheel wells. Just turn the tires and slide in. Everything is accessible.

[Mahlon]

<BLOCKQUOTE class="ip-ubbcode-quote"><div class="ip-ubbcode-quote-title">quote:</div><div class="ip-ubbcode-quote-content">Originally posted by r2dillon:
Most of us find that you need to go in through the wheel wells. Just turn the tires and slide in. Everything is accessible. </div></BLOCKQUOTE>
Throw a large sacrificial garbage bag, tarp, etc. over the wheel/tire/brake/kingpin so you don't get grease & brake dust all over yourself. When done, throw it away.

Working in the wheel well is by far the easiest way to do this.

[oemtech]

<BLOCKQUOTE class="ip-ubbcode-quote"><div class="ip-ubbcode-quote-title">quote:</div><div class="ip-ubbcode-quote-content">Originally posted by FullAstern:
What I can't get over is the price of the Taylor Extreme plug wires. $150.00 bucks for a set of 8 wires that are the shortest I've ever seen. </div></BLOCKQUOTE>

Have you checked the price of a set of standard wires from GM and/or Workhorse? Standby for sticker shock. I just checked the local GM dealer - $108.00 plus tax

Consider/compare the construction, wire size, resistance per foot, warranty and the extremes have a fiberglass boot for extra heat protection.

Lastly, I can do a set of plugs and wires in about 20 mins. I don't even think about removing the doghouse. As previous posters indicate you just turn the wheel all the way to one side, crawl under the rig a remove all the wires/plugs and install the new ones. Repeat for the other side.

Note - prep you wires and plugs before you crawl under the rig.

[DriVer]

<BLOCKQUOTE class="ip-ubbcode-quote"><div class="ip-ubbcode-quote-title">quote:</div><div class="ip-ubbcode-quote-content">Originally posted by oemtech:
Note - prep you wires and plugs before you crawl under the rig. </div></BLOCKQUOTE>OR have someone prep each one as he laughs at you each time you whack your knuckles on the frame.