Dodge Duranogo Problems
Record Breaker
Joined: Jan 2008
Posts: 1,163
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From: Upstate Ny
. Took it back to the muffler shop where I got my catalytic converter so they could check it out as i thought that was my problem they told me that my D: is running too rich and that it burnt my Cat again this was within a couple of days of installing it and that its not covered by the warranty and I need to pay for the replacement but he recommends I get the fuel mixture checked out before installing a new one. OH and just to top it of it wont pass smog not because a bad cat but because it has a supercharger
Champion
Joined: Jun 2006
Posts: 4,822
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From: Indiana
BS
IndyD
Hall Of Fame
Joined: Jun 2005
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From: Riverton, UT
From my experience of owning a forced induction vehicle (85 turbo shelby), it is always better to run colder plugs for forced induction engines. You should not have to worry about the heat range since you are already increasing the compression ratio by several factors, it will generate the the extra heat in the combustion chamber.
Forced air induction engines runs much better with colder plugs for those that likes to run their engines in the upper rpm range
Forced air induction engines runs much better with colder plugs for those that likes to run their engines in the upper rpm range
The colder plug retards the timing to burn latter. This avoids pre-denotation due to added compression lowering PING. Complete detonation will exceed into advanced timing due to the compression. Also octane would help but I think you would have to run airplane fuel to retard timing. This is why most racers utilize both.
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Registered User
Joined: Sep 2008
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From: ANAHEIM
Im not busting ***** but a couple days on a new cat? Im sorry but i cant see that happening. You live in CA right? Superchargers are allowed
As loud as that thing had to be with a straight pipe, you passed? Regardless of the payoff... I call BS too.
Champion
Joined: Jun 2006
Posts: 4,186
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From: Reno, NV
I would start looking at the o2 sensors. Also running rich doesn't run hot it runs cooler you are not burning off all of the fuel it in turn ends up taking the cat out by stuffing it full of fuel. I would clean those sensors and check out the others as well like the IAT and MAF.
Record Breaker
Joined: Jan 2008
Posts: 1,163
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From: Upstate Ny
In Ca a licensed/registered motor vehicle shop "cannot" turn down an emissions inspection, esp to a supercharger. They would take your money even if they knew you would fail. Now i can understand turning you down if your pushing a cel or something isnt legal/safe on the vehicle(shop liability). I know im def coming out as a ***** but im not trying to be. If the issues are so bad that somehow the cat got burned up in little time, your engine would be catching damage aswell. I'd park it till i knew what was hapening.
Quick question, now that your straight piped and suped, what Cel you throwin after reset?
