Topic: What spark plugs for my 2001 4 banger

[andpgud]

I asked because I got this answer on another forum. My car is a 2001


I think that only applies to systems with distributors, but every Jeep after 2000 has a DIS (Distributorless Ingnition System) and the double platinum plugs tend to last longer then copper plugs do because a DIS sends the spark more often..just make sure you get DOUBLE platinum. You can go with copper too but they will wear out quicker

[sharpxmen]

I asked because I got this answer on another forum. My car is a 2001


I think that only applies to systems with distributors, but every Jeep after 2000 has a DIS (Distributorless Ingnition System) and the double platinum plugs tend to last longer then copper plugs do because a DIS sends the spark more often..just make sure you get DOUBLE platinum. You can go with copper too but they will wear out quicker

I'm pretty sure that applies to the 4.0L engines. I can't see how the spark can be send to the plug more often unless it's a wasted spark system, i don't think that's the case with the Chrysler PCM in question (but can't tell you first hand).

[dwtaylorpdx]

Jeeps are just not high strung enough to be that sensitive to plugs,
Autolight or NGK (You can go Platinum if you have a burning desire to spend money)
But IN the jeeps I know of  the platinums have NOT lasted well.
Despite being a long time Bosche plug user I don't use them in my jeep,
they simply did not last as long and for some reason I eat plug wires with them...(No clue why)
I suspect they are slightly higher resistance than the NGK's... But no proof..

Dave

[Jeffy]

DIS was only used in the 4.0L.  The reason they went with the double platinum is because the DIS is a high-amp system.  I believe they have 3 coils/ballasts, in which each pair share one coil.  The 2.5L does not have this.

I'm not sure if the DIS sends multiple sparks or not though.  I know the MSD ignition does.  This is to help scavenge more power with more complete burn.  Although, you can do the same by increasing the spark plug gap and having a longer arc with an aftermarket coil.

[dwtaylorpdx]

Also most CDI systems only multi spark to 3000 or 3500 RPM after that its one spark...

Dave

[Dylan]

I've had nothing but good experiences with Bosch single platinums in my 2000 since I swapped out the original plugs at 12k miles... over 132k now and no complaints.  The only plugs I've ever had a bad experience with over the past 18 years I've been driving has been with NGK - picked up a set since they were supposedly the hot thing going at the time, two of them went completely dead in a month, haven't touched 'em since.

[dwtaylorpdx]

Its all in the luck and which plug if ya ask  me....

I've tried 3 different versions of the platinums in my 94 and none of them made 12K...
ON the other hand the NGK copper core standards last me about 45K a set.

I ran Platinums in a Toyota and same issues, but they worked great in my old
Porsche when running regular gas, when running unleaded they toasted quickly...

I wonder if its the crappy gas in oregon? Lots of alcohol and additives...

[MarkyB]

I'm currently running the Bosch Platinum 2s and they are fine,

so far.

[quicksand]

I have beening runnig NGKs V Groove on mine for 8 to 9 years now. No not the same ones. But in the past I have used bosch platniums with the 2 and the 4 pronger thinga migige, I also used regular champion copper, O a nightmare with E3s almost blew up my motor, stay away from those. Eiether way I always keep coming back to the NGK V Groove. They work best for me. I do run a accel coil which is rated at 48,000 volts, I also run accel 8mm wires. I found my sweet spot with the plugs gapped at .037. Remember as they burn or wear out the gap gets bigger. I do pulled them out about every 4 months or so, clean them and regap for optimum performance.