Spark plugs for 99

[Venomess]

I get a CEL for a cylinder 6 misfire that comes on and turns itself off sporadically every now and then. Car drives and feels completely normal. Since i bought the car I have not replaced the spark plugs or wires but now I intend to. What plugs are you guys using and what gap?

[Steve-Indy]

Many feel the stock Gen III plug is a better choice for a normally aspirated Gen II. The Gen III plug is a Champion RC12ECC.

Check out info in this thread:
https://driveviper.com/forums/thread...-replacement-s

[ducatithunder]

I bought new wires and new plugs on my 99 acr. Woke the engine up alot at idle and quick blips. Not to say it was bad before but just a noticeable difference. The wires were the original 98-99 date coded wires. I got a set of the Gen 3 plugs for around $34. New OEM wires were about $60.

[Venomess]

What gap are you using on the Gen 3 plugs? Same as if it was a Gen 2 plug Or should they be gapped differently?

[ducatithunder]

I ran the stock gap. The removed plugs were around .035. I set the new ones to the same gap then installed. Im not sure if they get gapped differently when installed in a Gen 2 nor do I now the gap for a Gen 3. Im sure the gap with change depending on what application your installing the plug in na, FI, etc.

[BrianACR]

Is there much difference going from the stock mopar wires to the aftermarket "upgraded" ones??

[99RT10]

Upgraded aftermarket ones are better by far.

[Lemay88]

Just for personnal knowledge,
What can be so different between aftermarket and oem wires??
Isn't it just a wire??

Thanks

Ben

[Venomess]

Found the issue.... it wasn't the plug...although cylinder 6 plug was totally black, it was the wire that at some point had fallen down onto the header. So I'll be buying some quality wires haha

[BrianACR]

I will be doing wires over the winter. Which are the best ones is your experience? All opinions are welcome

[Venomess]

http://www.qualitywires.com

[river rat]

Check out RSI for wires, been happy with mine.

[Geronimo]

I run Bosch + 4 plugs. Very happy.

[OK Falls GTS]

I will be doing wires over the winter. Which are the best ones is your experience? All opinions are welcome

Best wire is the one with the least resistance [ OHMS ] and high temperature rating for longevity. I always used solid S/S cored wires in my boats with dinosaur carburated engines. Now, my boat has 6.2 MPI Merc engines, so, carbon/silicon wires are used. Wiith cars today, we cannot run solid core wires, especially if you want to listen to tunes and radio stations,lol.
Here's a good explanation about wires. > Why does Resistance Matter?
Let’s take a look at the stock OEM plug wires as a reference point for a conservative type plug wire. OEM type plug wires are usually a carbon fiber that helps minimize RF noise. The drawback to using carbon fibers is a higher resistance in the plug wire which reduces the amount of electrical charge that can be delivered to the spark plug.

Solid core plug wires on the other hand have a very low resistance which can cause extreme levels of RF interference and random signals to other electrical components and is a good example of a pure race type plug wire where limited electrical components are used.

Tim Musiek of the Prestolite Performance, the parent company of Mallory, Accel and Prestolite wire, gave us a pretty safe range for selecting plug wires based on resistance. According to Tim, “My recommendation for a bone stock daily driver is to not go below 500 ohms per foot wire resistance. For a circle cars or door slammers, you can go down as far as you are comfortable. The only time I would go with a solid wire core is with an ignition system that has a magneto or points. Sprint cars would be a good example.”

There is an interesting breakthrough in solid core wires from Granatelli Motor Sports that offers the extremely low wire resistance and durability of solid core wires, yet according to GMS, suppresses the EMI and EFI “cross chatter” between electrical components.

J.R. Granatelli calls his patented process “the pepto bismol for the engine’s heartburn.” Granatelli explained by using a “Suppression Ring” on the outside of the wire, the Granatelli solid core wires “offer a near zero ohm resistance to the plug from the coil and still prevent the top end break up” that used to plague solid core wires in vehicles with multiple engine reference sensors.

I'm sure our Gen II Vipers came with same quality wires as the Grand Caravan, haha.

[BrianACR]

Check out RSI for wires, been happy with mine.

They had a black Friday sale so I ordered a set from RSI.
Geronimo, I also run the +4s. I find they work well.
OK Falls, thanks for the info!

[mackzilla]

Whatever VSP sells is the nicest wire I've ever used.