Last post on Nov 10, 2013 at 1:53 PM
You are in the Volkswagen Jetta
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Volkswagen Jetta, Sedan
#5150 of 6655 Re: Performance Air Filter.......lacking performance?????? [bpeebles]
Apr 02, 2007 (1:14 pm)
UNDER NO CIRCUMSTANCES SHOULD YOU INSTALL ONE OF THOSE OILED GUAZE FILTERS (aka K&N)-- THE OIL FROM IT WILL DESTROY YOUR MASS AIRFLOW SENSOR!! -- (you have been warned)
Partly true - a K&N filter can be used successfully without destroying the MAF sensor - the key is making sure that the filter isn't over-oiled - a common mistake made by those unfortunate few whose MAF sensors met their demise.
I don't use it personally. After months of researching performance filters for my car, I decided to keep the existing factory airbox and purchase an ITG panel filter for my chipped 1997 Jetta 2.0L. It's a high-flow filter with a dust retention rate of 99%. The ITG Panel filter (made in England) never needs washing or oiling (unlike the K&N) - the bottom half of the filter is pre-oiled from the factory (The oil that is used is somewhat thicker than the K&N oil). They recommend wiping the filter with a lint free cloth to remove the surface dirt, and then using a vacuum cleaner to remove the deeper particles at every engine service interval.
So far I've been using this filter for 15,000 miles, and there hasn't been any residue on my MAF (or on the top 1/2 of the filter), and the engine's pickup and response has improved greatly, without the excessive intake sound from the cone intakes.
That being said, I wouldn't try this on my 2003 1.8T. That car will use nothing but stock air filters. During discussions with my longtime VW mechanic, he mentioned that the Mk3 MAF sensors are less susceptable to contamination due to the quick heating time of the magnesium element (to 1000 degrees F). The MAF elements on the early MKIV cars, for some reason, didn't heat up as quickly, and as a result, failed because it wasn't hot enough to burn off any residue. The MAF was eventually redesigned for the later MKIV cars in order to heat up quicker for contaminant removal.
#5151 of 6655 Re: 2001 jetta problems [carriuolo]
Apr 02, 2007 (1:59 pm)
The codes from the CEL will give you a start as to what might be the trouble.
If you can get to a auto parts store they might be able to read the codes for you.
Our AutoZone does it for free and then can print out what each codes represents.
Had this done for my daughters 1998 Jetta.
Hopes this helps.
Once you have codes and what they are for then post again.
#5152 of 6655 Re: 2001 jetta problems [carriuolo]
Apr 02, 2007 (3:36 pm)
The 1st thing that you need to do is have the codes read. There are a lot of various sensors and parts in these cars that are capable of making the car run crappy. The rotten egg smell is putting too much unburned fuel through your catalytic converter (not a good thing to do as eventually it will overheat and get damaged). When the coil pack started going bad on my daughter's car, the problem only appeared on rainy or very humid days (if your car runs ok on dry days you can spray a mist of water from a spray bottle onto the coil pack to try to prove that it is bad). I would think that you can drive it to the dealer. You really do need to see what codes are setting the check engine light before you rush to judgement on the cause of your problem though.
#5153 of 6655 Re: Performance Air Filter.......lacking performance?????? [bpeebles]
Apr 04, 2007 (5:48 am)
hey bpebbles i recently just placed my stock airbox system back in my car, i took a look at my snow screen (thanks for the vid by the way)and the screen is completed ripped! is there any way to replace this screen and is it expensive???
#5154 of 6655 Re: Performance Air Filter.......lacking performance?????? [joker55]
Apr 04, 2007 (5:57 am)
Not bpeebles here, but the screen sub assembly is held in, as you probably can see by two black philips screws. Upon removal of the screws, the piece sort of notches/unnotches.. slides (at an angle) into the main snorkle assembly. So while I would think your local junk yard or specialized VW independent shop might have one lying around; abeit, cheaper, take the pieces to the dealer and ask their pricing. While not absolutely necessary, it DOES tend to keep the bigger chunks (of debris) out of the bottom (dirty side) of the stock air box.
#5155 of 6655 Re: Performance Air Filter.......lacking performance?????? [joker55]
Apr 04, 2007 (2:37 pm)
If your snowscreen is physically damaged, you may consider just remove the rest of the snowscreen and leave it out. (put the end which contained the snowscreen back on the pipe)
If you want to replace the snowscreen... I would personally start at a salvage yard. All of the A4 VWs (except New Beetle) should have the same snowscreen.
#5156 of 6655 Re: 2001 jetta problems
Apr 04, 2007 (5:40 pm)
Thanks for the info. I took it to the dealer, had it towed (lucky for me I have AAA, so it cost about $10). The dealer determined that it was the ignition coil. SO we replaced that and $700 later I get my car back, drive it around for about 24 hours and the check engine light comes back on. I brought it back to the dealer and the code it is now coming back with is in regard to the catalytic converter (p0420). He cleared it hoping that it just needed to burn through some of the fuel . I drove it around for a little while and the next day the light is back on. He did locate a technical bulletin from VW in regard to updating programming and that the catalytic converter monitoring is too sensitive. So, I will try this $90 attempt to fix it and hope that it is not the catalytic converter which would cost me a whole bunch of $$$$. Any other advice?
#5157 of 6655 Re: 2001 jetta problems [carriuolo]
Apr 04, 2007 (6:08 pm)
The coil-packs on the VR6 engine were "recalled" due to a high failure rate on them. I beleive your 2001 was part of that campaign.
Also, your MAF sensor was part of another VW recall.Here is a copy of it If your MAF is not sensing the airflow properly, then it MAY be affecting the effecincy of yout catalyst.
You did not say how many miles are on your VW... have you read your FEDERAL EMMISSIONS WARANTEE that came with your car? All emmissions equipment is waranteed by law for 10 years / 100.000 miles. (for your 2001)
(The coilpacks and the catalyst are considerd emmissions equipment which are covered by federal law.)
#5158 of 6655 Re: 2001 jetta problems [carriuolo]
Apr 04, 2007 (6:32 pm)
I had the same problem with my 97 coil pack. a quick inexpensive fix that has worked for 2 years now...we took the coil pack out dried it with a hairdryer (you'll see the hair line cracks that let the moisture in) and then we covered it in metallic apoxy (be sure it with stands high temps) let it set for 24 hrs & reinstall. Cleared the code and no problems since. 2 years later it looks like the apoxy is cracking so we'll do the same thing all over. Not a bad deal for the cost of a tube of apoxy.
#5159 of 6655 Re: 2001 jetta problems [bpeebles]
Apr 04, 2007 (6:47 pm)
My car has 87,000 miles on it. My dad told me that within the past few years the federal government lowered the warantee for emissions to 80,000 miles. I was told when I called VW that ignition coils were not part of the emissions system and that my VIN number was not part of the recall even though I have the same engine??? Do you have access to a copy of the coil pack recall? I will look at the federal emissions warranty that I received when I purchased the car. THanks for the info.