Smoke???

bigblock79 · Aug 9, 2013

2002 4.7L smoke black, thought about putting a Cummins sticker on my rear window since it smoke soo bad when i punch it. it running really rich, the cat was removed and the O2 sensors arent reading, would that cause the smoke and the MAJOR drop in my gas mileage? averaging 6mpg...

02 Ram · Aug 9, 2013

Yes, the o2 gives feedback to the ECU to control fuel. That is causing it to run rich. The black smoke is fuel and since its running rich, yes you are going to see crap mileage

ercmesser · Aug 10, 2013

Had the same problem replaced upstream o2s and problem solved

Redtruck-VA · Aug 10, 2013

Check your oil for gas contamination, you maybe washing your cylinders. You need the front O2s looked at. What codes are you throwing?

bigblock79 · Aug 11, 2013

P1595
p1491
p0645
p0171

Redtruck-VA · Aug 11, 2013

Your codes cover a variety of voltage related issues. I would check grounds and battery. Charge it overnight and measure the standing voltage, it should be 13.8vdc.

Smoke???

bigblock79

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02 Ram

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ercmesser

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Redtruck-VA

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bigblock79

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Redtruck-VA

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