Car is running rough. I took it to local Dodge dealer and they misdiagnois the problem. It cost over $1,000. The car engine has a code of P0172 which I have researched and (below in details)

Asked by Aug 09, 2016 at 01:53 PM about the 2004 Dodge Caravan SE

Question type: Maintenance & Repair

discussed with my long time mechanic.  He has checked the vacuum lines and the fuel line.  He has also swapped in and out parts that he thought were defected.  However the one problem he can't understand is the spark plugs which are new are black in cylinder 1 and 4.  The plugs are white in the other ones.  Do have any insight on what the problem is ?  I am going to try Sea Foam Injector cleaner and run the car at fast speed up the interstate to see if any thing happen.  Thank you in advance for any advice.

2 Answers

12,045

1 and 4 cyl, are running rich bank one BLACK FLUFFY (not wet) deposits don't waste your money on Seafoam..(kerosene) that money could be spent towards repairing the problem! lots of possibly cause for running rich BUT, the plug reading indicates 1 and 4 I would read fuel trim in real time with a real scanner and injector cycle times an oscilloscope can spot a bad injector wave. $1000 and they couldn't isolate the cause of bank one rich ODD with a factory DBRIII scan tool and gas analyzer!

24,335

Need to know what engine. You show running too rich on bank 1. On most Dodge engines cylinders #1 and 4 are in banks 1 and 2 respectively. Problem may be present in both banks but just detected first in bank 1. Can be leaky fuel rails or individual injectors. Carbon scoring on plugs is a sign of running rich. Could be fuel leak, could be bad coils...

Your Answer

Add photo

Related Questions

Caravan

Looking for a Used Caravan in your area?

CarGurus has 673 nationwide Caravan listings and the tools to find you a great deal.

ZIP:

Search Dodge Caravan Questions

Dodge Caravan Experts

#1 Tom Demyan
Tom Demyan
Reputation 1,290
#2 COMETGUY61
COMETGUY61
Reputation 760
#3 tenspeed
tenspeed
Reputation 680
View All

Related Models For Sale

Used Dodge Grand Caravan
177 Great Deals out of 28,899 listings starting at $2,083
Used Chrysler Town & Country
298 Great Deals out of 16,753 listings starting at $1,700
Used Honda Odyssey
213 Great Deals out of 22,386 listings starting at $2,200
Used Toyota Sienna
239 Great Deals out of 29,445 listings starting at $289
Used Kia Sedona
106 Great Deals out of 8,627 listings starting at $2,395
Used Dodge Durango
267 Great Deals out of 22,662 listings starting at $1,200
Used Nissan Quest
62 Great Deals out of 2,751 listings starting at $2,000
Used Chrysler Pacifica
61 Great Deals out of 28,189 listings starting at $1,995
Used Ford F-150
2,179 Great Deals out of 206,277 listings starting at $1,499
Used Ford Explorer
946 Great Deals out of 72,548 listings starting at $1,499
Used Toyota Camry
1,011 Great Deals out of 90,532 listings starting at $650
Used Ford Escape
1,400 Great Deals out of 93,890 listings starting at $900
Used Dodge Ram 1500
461 Great Deals out of 11,092 listings starting at $700

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.