As I posted on a previous thread I took my 2000 Viper out and when I got home I got the check engine light. Put my OBD2 scanner on this morning and it popped with a PO302 code “#2 cylinder misfire”
What is the best method for determining the cause. Connections to coils all look good and connected. Battery is fully charged, plugs wires all seated properly. Is safe to assume it a bad #2 coil? What do you all think?
Spark plugs are cheap. I was recently convinced that I had some sticky injectors, so I had them cleaned and flowed. Didn't fix it. Checked wire resistance and all was good, spark was getting to the plug boot, so new plugs ultimately fixed the problem.
Spark plugs are cheap. I was recently convinced that I had some sticky injectors, so I had them cleaned and flowed. Didn't fix it. Checked wire resistance and all was good, spark was getting to the plug boot, so new plugs ultimately fixed the problem.
Not a bad idea, thought about that Spark plugs and upgraded wires have less than 1000 miles on them and are about 24 months old.
Spark plug wires are subject to degradation especially due to high engine bay heat. - A possible cause; but, I like the suggestion of looking at or replacing the easiest cheapest thing first = spark plug.
Okay, I’ll pull the plug and replace it and go from there. I’ve had “coil on plugs” fail in the past 2 years on my 4Runner which is what made me consider that as a possibility. That car is 8 years newer than the Viper.
It's hard for me to believe how frequently individual coils fail on modern engines. My Viper still has the OEM packs on it and they are nearing 25 years old.
Is the gap correct? ( 0.033" TO 0.038" ) The photo makes it look narrow. ( could just be camera angle. )
I agree, it looks way too small. I had these installed by certified Viper Technician here in Eastern NC. I think I can safely say this is the smoking gun. Now I probably should pull all of them.
It just looks cold fouled to me. You could open it up to the higher side of the range and screw it back in. It may clean itself up just fine. Best advice is to screw a new plug in it.
Make sure to use the SRT plug over the original. RC12ECC, Champ 438
i saw this suggested before in other threads but i bought plugs before seeing any of this threads as I was buying a bunch of stuff from the same place.
Went with IRIDIUM XP (XP985) as they had a rebate but got screwed on the rebate.
Well, I replaced it with a Champion RC12ECC gapped at .35 and alas....still have the misfire code and it wouldn’t clear.
Now what? Wires are almost new and look perfect.
The AutoGuide.com network consists of the largest network of enthusiast-owned enthusiast-operated automotive communities.
AutoGuide.com provides the latest car reviews, auto show coverage, new car prices, and automotive news. The AutoGuide network operates more than 100 automotive forums where our users consult peers for shopping information and advice, and share opinions as a community.
Linear Mode
