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Post by rocketman on Jan 22, 2009 6:50:53 GMT -6
Just put the oven on "warm" which I believe is in the 200 degree range but I wouldn't wait until it got that hot.
I wanted to look at my manual last night for more info on your code but I didn't have time.
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Post by intheb0x on Jan 22, 2009 9:25:05 GMT -6
thanks for the help , everyone has been a great help, the p0300 is just a random misfire code
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BNICOV
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Post by BNICOV on Jan 22, 2009 20:11:56 GMT -6
If you've already got a new cat, go to the local muffler shop and have them weld it in place. I'll bet you a finn that the cat was plugged to all heck. My old firebird would ping, backfire and just not go when the cat plugged. Don't wait to fix this, you'll end up doing a lot more damage to the 3 O2 sensors and who knows what else.
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Post by intheb0x on Jan 24, 2009 0:11:13 GMT -6
but im still trying to find out what the root problem is, im thinking if it was the cat it would happen as soon as i start my car, as i said i can drive it to and from work, and to the store with no issues, its when i take longer trips when it happens.
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BNICOV
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Post by BNICOV on Jan 24, 2009 20:35:42 GMT -6
I'm tellin' ya, it sounds like the cat is plugged up, when it heats up good after driving for a half hour or so or after a few minutes of thrashing it, she runs like cr......pola. If you already have a new cat, go to the local muffler shop, they'll weld it on for probably 50 bucks or so. OR, get the car scanned by a qualified mechanic.
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Randy T.
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Post by Randy T. on Jan 24, 2009 21:14:44 GMT -6
Cat, cat, cat. I had a minivan with a clogged cat. You could drive it all you wanted short distances and it ran great. When you would drive it for 15 minutes or more it would barely even run. If you put it on, and it clogs again then you have other problems to worry about. But until then I would just replace the cat.
And I don't know about 2gs, but on Classics you want to go with the OEM style cat. On my first Aurora I had one put on that was universal, and now my whole exhaust system needs replaced. I doesn't all need replaced because of that, but it is easier to do it that way.
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Post by intheb0x on Jan 25, 2009 0:00:50 GMT -6
Randy t but dropping 284$ for the magnaflow directfit replacement is a costly repair to me just to have it clog up, like i said i was driving it today, went to picknsave maybe 5 miles away drove fine, but i notice it is not the same but it drove fine, its under long distances i have bad problems, so this sounds like a cat for sure to you?
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Post by intheb0x on Jan 25, 2009 0:02:35 GMT -6
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Post by Aurora40 on Jan 25, 2009 9:07:13 GMT -6
Why not spend $20 on an infrared temp gun and find out if it is really the cat? If it's clogged, one end will be much hotter than the other end.
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Randy T.
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Post by Randy T. on Jan 26, 2009 0:04:06 GMT -6
x2 what Aurora40 said. It couldn't hurt for you to buy a scan tool either.
I wouldn't think yours would be clogged with that low of miles without another problem, but it is possible. Another way to check is to have someone drive behind you to judge how bad of a sulfur smell you have. The worse it smells the more your cat would be clogged. You can also run with the rear windows down and get a whiff of it sometimes. My brother replaced his cat when it didn't need it and it clogged again. After he fixed the problem the new one was still okay.
And someone said earlier that you could tap the side of the cat to tell if it is bad, that is not true. It is sometimes because you can tell when they start breaking apart. But they don't usually break apart when they are bad.
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Randy T.
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Post by Randy T. on Jan 26, 2009 0:08:56 GMT -6
I also wanted to say I am not an expert on cats, so I could be totally wrong. I am just going off of personal experience I have had. I bet if you go to an exhaust shop they might be able to help you a little more. I would think they would recommend to replace it. $$
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Post by intheb0x on Jan 26, 2009 1:27:21 GMT -6
ill go buy the temp gun tomarrow, where can i buy one? autozone or advance auto parts?
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Randy T.
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Post by Randy T. on Jan 26, 2009 11:24:15 GMT -6
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Post by ntrenn on Jan 26, 2009 11:57:54 GMT -6
Harbor Freight has a cheap temperature gun listed on their website, but not sure if they have them in stock yet.
As far as the Cat - it's job is to figuratively BURN the mixture that it sees and convert the composition from NOX to N2 and O2 as well as top off any unburned HC's. If you somehow dump unburned HC's (read as misfire) into the exhaust, this can literally melt the honeycomb substrate and cause the passages to clog.
More than one person has had a failed cat. I see a 'test pipe' in your future......
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Post by intheb0x on Jan 26, 2009 22:34:05 GMT -6
i would like to know more about the 02 sensors, how many of them are there? also with my nissan when i did the full exhaust i took the second 02 sensor and added a spacer bolt to the sensor thus eliminating the check engine light because of the full exhaust not running a cat, is it possible for me to do this on the aurora?
i could have the old cat cut out and a piece of metal pipe welded in its place.
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Post by Marc on Jan 26, 2009 22:49:17 GMT -6
The 2001 4.0 has 3 O2 sensors. 1 in each exhaust manifold & 1 right after the catcon. As for the 2nd question, I don't think so.
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Post by rocketman on Jan 27, 2009 8:04:45 GMT -6
I wouldn't mess with eliminating the cat on these newer cars - cars in the mid 80s, yes. These cars are much smarter.
In NJ, you would fail inspection for removing the cat. They check that with a mirror every time. Not sure what your state does.
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Randy T.
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Post by Randy T. on Jan 27, 2009 8:13:56 GMT -6
Aurora exhaust comes off in like 15 minutes. Hang it from a rafter and use an extension with a wood paddle bit and a long prybar or screwdriver. You will have a perfectly cleaned out cat soon after. I have done it 3 times to Classics. They run so much better this way.
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BNICOV
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Post by BNICOV on Jan 27, 2009 9:12:36 GMT -6
If you 'punch' the cat, you will have the SES light on constantly, the back O2 sensor will throw a code letting you know that your cat is not working properly.
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Post by lowgear on Jan 27, 2009 14:29:16 GMT -6
I've been following this thread with interest as my 3.5 threw PO300 on the weekend. No driveability issues yet but a check of the front three plugs yesterday showed white deposits on what look to be the original plugs (123000 kms). I cleared the code but I'm thinking a trip to the dealership is in the cards - all this talk of clogged cats, shot coil packs etc is making me nervous
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Post by rocketman on Jan 27, 2009 18:33:15 GMT -6
White deposits would indicate a lean or hot condition. They should be cocoa brown. Based upon the very little info you posted, I'd replace the plugs first, go to Autozone, clear the code and see if it returns. If it returns, move forward.
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BNICOV
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Post by BNICOV on Jan 28, 2009 15:15:01 GMT -6
Speaking of shot coil packs, my 'bargain' coil pack that came from the wreckers puked, #4 was dead, I got a replacement and lo and behold, #4 is dead on that, I ordered a new Delphi unit from Rockauto.com so hopefully I get it soon cuz my car is running like total kaka right now and I don't want to do another cat.
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Post by rocketman on Jan 28, 2009 18:16:33 GMT -6
How many miles on the original coil before it died? Could help this feller out as a barometer........
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BNICOV
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Post by BNICOV on Jan 28, 2009 20:42:04 GMT -6
Over 100,000 miles, it puked right after I did a tuneup. It's an expensive part here in Canada ($450 + taxes), and there are 2 of them.
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Post by ntrenn on Jan 28, 2009 21:12:14 GMT -6
Mine started going before 60,000 miles. Yes - over US$300 for a coil new from the dealer.
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Post by intheb0x on Jan 30, 2009 5:21:30 GMT -6
ntrenn, and others having coil problems, please tell me your symptoms leading up to you finding out the coil was bad?
as for the SES light, i was thinking of running a sparkplug fouler/02 spacer thing i used on my nissan to "fool" the sensor, i run without a cat on there, i found a shop that will cut it out also, so im still thinking on what to do, i just drive to and from work and if i gotta stop somewhere else on the way i make sure its close by,
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Post by rocketman on Jan 30, 2009 6:47:11 GMT -6
There are no "leading up to" symptoms on a coil. You just notice bucking, especially on accleration ad a missing engine. A coil is either good or bad. The closest thing you will get to a warning is when it happens after getting hot moreso than all the time. As the coil gets hot, the insulation on the wire (internal coils) becomes insufficient and creates a missing condition.
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Post by ntrenn on Jan 30, 2009 19:19:22 GMT -6
Rocketman, I have to agree, but the 2nd gen coils operate a little differently than older coils. These coils actually modulate the spark voltage based on throttle position. It started out with an occasional miss. Later it would run just fine under light throttle. Worked fine on the expressway at highway speeds. If you tipped into the throttle more than 20-25%, you would get the miss. Lighter throttle, less miss. Hammer the throttle, way BAD miss - enough to flash the SES light.
It's not really easy to diagnose the coil without a good scanner, and it's a VERY expensive part to just swap out. I had a P0308 (or P0306) - so it was in a single cylinder. I swapped out the plug with the one next to it. Then swapped the boot. Then swapped the injector. Not one iota of difference. Ran it on the GOOD scanner (because I was at wit's end) - it said that coil was bad. New coil and all was well. Got about 30,000 on the new coil.
I have my bad coil. It's not really worth sending unless you really need it for diagnosis. A good shop with a GOOD scanner/analyzer should be able to tell you in 5 minutes. For the 1 price, they also told me my crank sensors were going - so I knew I had that coming later.
Just checked Rockauto - they now have the Delphi version for under $200....both front and rear about the same price....can't go too wrong there.
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BNICOV
Aurora Lover
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Post by BNICOV on Feb 3, 2009 7:43:23 GMT -6
Actually, the coil is $171 and change from Rockauto.com + shipping and taxes. That's where I got it from, it was at my door in a few days. Well worth the wait for the savings.
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Post by rocketman on Feb 3, 2009 10:34:56 GMT -6
inthebox
Any developments?
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