Help diagnosing p0420
#11
Well you dont need more expensive gas, you should be using 91 already, and many chips run on that, while you also have the option to use a gas with a higher octane rating. An increase in in maintenance is debatable, most run chips for a very long time without extra consequence to their powertrain. There is barely any labor involved in getting chipped, the only thing is it is a good idea to get a new diverter valve, but is extremely easy to do with only a screwdriver basically. You can get a DV for 100 bux and the chip for an 01 with GIAC you could probably get as low as 350 or so I think maybe 4.
Last edited by Dallas09; 04-18-2010 at 06:19 PM.
#12
thanks Dallas,
Gasoline:
Surprisingly, 91 is not usually available in my area, so I usually use 89. The owners manual says anything 87 - 91 is adequate. It also recommends 91 for best results. Other sources say not to use a higher octane. Thus I settle for 89.
From what I've read - a 'chipped' car needs 91 OR 93 or even higher. I believe the higher the octane the harder it is to ignite the gasoline - so I guess more compression (or something) is needed. Thus my concerns about engine longetivity/maintenance.
And as you point out - the DV. I didnt realize the DV was that easy of an install.
Someone offered me a used chip and DV. I'm tempted but still hesitant. (They might not even have it any more - that was a few weeks ago).
Number 1 - gotta make sure that the car is a keeper and that it will pass the state inspection. If it won't pass inspection then no use in dumping money into it. Rather, any money spent will be spent on making it inspectable.
then, there is a leaky oil line - not sure if it is a big deal yet. My oil is not leaking/draining/burning very much. But I've only had the car for 6 weeks or so. So, time will reveal more.
Jim
Gasoline:
Surprisingly, 91 is not usually available in my area, so I usually use 89. The owners manual says anything 87 - 91 is adequate. It also recommends 91 for best results. Other sources say not to use a higher octane. Thus I settle for 89.
From what I've read - a 'chipped' car needs 91 OR 93 or even higher. I believe the higher the octane the harder it is to ignite the gasoline - so I guess more compression (or something) is needed. Thus my concerns about engine longetivity/maintenance.
And as you point out - the DV. I didnt realize the DV was that easy of an install.
Someone offered me a used chip and DV. I'm tempted but still hesitant. (They might not even have it any more - that was a few weeks ago).
Number 1 - gotta make sure that the car is a keeper and that it will pass the state inspection. If it won't pass inspection then no use in dumping money into it. Rather, any money spent will be spent on making it inspectable.
then, there is a leaky oil line - not sure if it is a big deal yet. My oil is not leaking/draining/burning very much. But I've only had the car for 6 weeks or so. So, time will reveal more.
Jim
#13
that was me, tune is sold, dv is still avaliable... your car might fail due to the hf cat, but might pass with a tune... or if you need a cat, ask around in your regional section to see if someone has one you can borrow or i have one you could get cheap
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