running fine,then bucks

Asked by Jan 17, 2012 at 05:57 PM about the 1997 Volkswagen Passat 4 Dr GLX V6 Sedan

Question type: Maintenance & Repair

Hello,we have a 1996 Passat 4cyl. It purrs like a kitten,but after 10 or 15 min. it bucks like crazy.The refs go up and down with some back-fires.We installed new plugs, wires,fuel filter,fresh gas.(even added gas-treatment).Any ideas???

3 Answers

4,735

Hmmm....a clogged catalytic converter might be the culprit... but, backfires are uncommon unless there's a serious overage of fuel in the exhaust. I would check the CAT first...then look for an injection issue.

65

Does the bucking and messing about continue or clear up? In 10 to 15 minutes the engine would get hot. I would guess at a sensor failing and delivering a very rich mixture, over-fuelling would cause all of those symptoms. Get it on a diagnostic computer with someone who knows how to use it.

4,735

1996 Passat should have an OBDII computer (on-board diagnostic). IF you had a sensor throwing a code, you would have a light on the instrument console. A visit to a diagnostic center is a good idea.

Your Answer

Add photo

Related Questions

Passat

Looking for a Used Passat in your area?

CarGurus has 25,131 nationwide Passat listings starting at $999.

ZIP:

Search Volkswagen Passat Questions

Volkswagen Passat Experts

#1 tenspeed
tenspeed
Reputation 1,300
#2 Tom Demyan
Tom Demyan
Reputation 1,220
#3 Chrisand Edwards
Chrisand Edwards
Reputation 1,130
View All

Related Models For Sale

Used Volkswagen Jetta
561 Great Deals out of 44,281 listings starting at $800
Used Honda Accord
1,048 Great Deals out of 68,868 listings starting at $1,000
Used Toyota Camry
1,216 Great Deals out of 84,969 listings starting at $750
Used Audi A4
293 Great Deals out of 10,641 listings starting at $1,200
Used BMW 3 Series
1,016 Great Deals out of 31,286 listings starting at $975
Used Nissan Altima
1,295 Great Deals out of 75,735 listings starting at $1,695
Used Honda Civic
872 Great Deals out of 85,333 listings starting at $500
Used Hyundai Sonata
868 Great Deals out of 48,082 listings starting at $1,495
Used Volkswagen GTI
100 Great Deals out of 8,321 listings starting at $2,400
Used Nissan Maxima
327 Great Deals out of 24,436 listings starting at $1,995
Used Volkswagen Golf
72 Great Deals out of 4,748 listings starting at $1,200
Used Audi A6
140 Great Deals out of 6,224 listings starting at $2,177

Used Cars For Sale

2017 Volkswagen Passat For Sale
15 Great Deals out of 14,708 listings starting at $14,277
2016 Volkswagen Passat For Sale
90 Great Deals out of 2,027 listings starting at $9,988
2015 Volkswagen Passat For Sale
106 Great Deals out of 2,698 listings starting at $7,900
2014 Volkswagen Passat For Sale
26 Great Deals out of 1,394 listings starting at $7,995
2013 Volkswagen Passat For Sale
46 Great Deals out of 1,209 listings starting at $5,999

Content submitted by Users is not endorsed by CarGurus, does not express the opinions of CarGurus, and should not be considered reviewed, screened, or approved by CarGurus. Please refer to CarGurus Terms of Use.