 OT: Jetta exahust leak |
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| ruddyboys |
 Jan 13 2009, 03:00 PM
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#1
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Hummel eigentümer  Group: Members Posts: 594 Joined: 3-March 04 From: Monroe, NY Member No.: 1,749 Region Association: North East States  |
My jetta aways got 34mpg, but lately have been getting around 28-30. Last night the check engine light came on and the exhaust sounded load under the car, would an exhaust leak be the cause of bad gas mileage?
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| Cap'n Krusty |
Jan 13 2009, 04:42 PM
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#2
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Cap'n Krusty Group: Members Posts: 10,794 Joined: 24-June 04 From: Santa Maria, CA Member No.: 2,246 Region Association: Central California |
Could be. What year is it, and what engine/tranny combination? If the CEL is on, why not just have it scanned? Many chain auto parts stores will scan it for free. Of course, you get what you pay for, a scan by someone who, besides being clueless, wants to sell you parts. The Cap'n (whose Jettas get 50 mpg!)
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| ruddyboys |
Jan 13 2009, 04:59 PM
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#3
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Hummel eigentümer Group: Members Posts: 594 Joined: 3-March 04 From: Monroe, NY Member No.: 1,749 Region Association: North East States |
My Jetta is 2003 with 165,000 miles, has the 2.0L manual trans. When I took it to VW about 3 months ago, with the check engine light on they said it was both O2 sensors, changed both and the light stayed off since last night.
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| Cap'n Krusty |
Jan 13 2009, 05:37 PM
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#4
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Cap'n Krusty Group: Members Posts: 10,794 Joined: 24-June 04 From: Santa Maria, CA Member No.: 2,246 Region Association: Central California |
You DO know there are in excess of 1500 codes and variations, right? It could be anything. Granted, some wont turn the light on, and still others take multiple drive cycles to do so. There are many things which could affect your fuel mileage, including a bad MAF sensor, a bad thermostat, a bad CTS (VERY common!), an exhaust leak before the cat, a broken vacuum line, and a bunch of other things. Most good aftermarket VW shops have either the VW factory scanner, or Vag Com, an aftermarket system. You need to have it scanned.
The Cap'n |
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| r_towle |
Jan 13 2009, 05:45 PM
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#5
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Custom Member Group: Members Posts: 24,594 Joined: 9-January 03 From: Taxachusetts Member No.: 124 Region Association: North East States 
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If you are bored you can get VAGCOM online and download if for free.
From Ebay you can get the correct cable to use with VAGCOM and your computer. At VWVortex.com you can find all the codes and many opinions how to fix things. Rich |
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| Drums66 |
Jan 13 2009, 05:51 PM
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#6
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914 Rudiments Group: Members Posts: 5,321 Joined: 15-January 03 From: Coronado,Cali Member No.: 151 Region Association: Southwest Region |
(IMG:style_emoticons/default/agree.gif) echo= you need to have it scanned!
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| Cap'n Krusty |
Jan 13 2009, 06:43 PM
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#7
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Cap'n Krusty Group: Members Posts: 10,794 Joined: 24-June 04 From: Santa Maria, CA Member No.: 2,246 Region Association: Central California |
QUOTE(r_towle @ Jan 13 2009, 03:45 PM)  If you are bored you can get VAGCOM online and download if for free. From Ebay you can get the correct cable to use with VAGCOM and your computer. At VWVortex.com you can find all the codes and many opinions how to fix things. Rich Most, if not all the e-bay cables work only marginally on a 2003, and the freeware version doesn't do much of anything other than basic codes. Besides that, Ross-Tech won't support users of non-Ross cables. The Cap'n |
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