What would make my 2002 Dodge Ram 1500 with a 4.7l engine have terrible fuel mileage?


Asked by Jan 01, 2016 at 03:09 PM about the 2002 Dodge Ram 1500 SLT SB

Question type: Maintenance & Repair

What all reasons would make a 02 Dodge Ram 1500 ST with a 4.7
use twice of the amount of fuel it should be using and exhaust smells
rich also ?

4 Answers


Leaking fuel injectors will make the truck run rich. I bet you engine oil also has gas in it. Fix this before you damage your engine.

1 out of 1 people think this is helpful.

There are 2 common reasons for the 4.7 to be a gasaholic. The first is bad injectors. Connect a fuel pressure gauge to the fuel rail, start and stop the engine. The fuel pressure should remain fairly constant. If it doesn't 1, or more, injectors are leaking. The second, and more common is the ECT. With a code reader that is live data capable, check the engine coolant temp with the engine cold. Start the engine and verify that the sensor reads the coolant temp increasing all the way to the 190's F. Usually, these sensors lock cold and you end up driving with the engine in full choke mode..

2 out of 2 people think this is helpful.
Best Answer

Thanks for the info from Full of Regrets and techpaddle. Should I change all of the injectors or just the o rings on them if there leaking when i pressure test them ? Also the ECT what is it ? Do you mean the coolant temp. sensor when referring the "ECT" ? Thank You Very Much and Happy New Years


If the injectors show leakage, pull them out and have an injector shop or diesel repair shop run a leakage test on them. The leak is internal and cannot be repaired easily. It is best to replace the defective ones and put new upper and lower O rings on the others. ECT is the Engine Coolant Temp. sensor. It tells the computer at what temp. the engine is running at.

1 out of 1 people think this is helpful.

Your Answer

Add photo

Related Questions

Ram 1500

Looking for a Used Ram 1500 in your area?

CarGurus has 13,739 nationwide Ram 1500 listings starting at $995.


Search Dodge Ram 1500 Questions

Dodge Ram 1500 Experts

#1 Dan Connell
Dan Connell
Reputation 5,280
#2 pudgybear
Reputation 5,000
#3 dandyoun
Reputation 4,670
View All

Related Models For Sale

Used Ford F-150"
3,268 Great Deals out of 216,650 listings starting at $1,500
Used Chevrolet Silverado 1500"
2,445 Great Deals out of 144,778 listings starting at $1,995
Used Dodge Ram 2500"
153 Great Deals out of 5,744 listings starting at $2,289
Used GMC Sierra 1500"
1,028 Great Deals out of 56,923 listings starting at $2,300
Used Toyota Tundra"
614 Great Deals out of 26,773 listings starting at $2,500
Used Toyota Tacoma"
623 Great Deals out of 30,504 listings starting at $2,850
Used Dodge Dakota"
161 Great Deals out of 4,799 listings starting at $900
Used Ford F-250 Super Duty"
444 Great Deals out of 42,988 listings starting at $2,250
Used Dodge Ram 3500"
105 Great Deals out of 2,511 listings starting at $4,995
Used Ford Mustang"
731 Great Deals out of 41,065 listings starting at $900
Used Jeep Wrangler"
463 Great Deals out of 16,414 listings starting at $3,400

Used Cars For Sale

2006 Dodge Ram 1500 SLT SB For Sale
23 listings starting at $6,988