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
Engine
use twice of the amount of fuel it should be using and exhaust smells
rich also ?

4 Answers

74,525

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 of 1 people found this helpful.
120

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..

3 of 3 people found this helpful.
Best Answer Mark helpful

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

120

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 of 1 people found this helpful.

Your Answer

Ram 1500

Looking for a Used Ram 1500 in your area?

CarGurus has 10,657 nationwide Ram 1500 listings starting at $1,500.

ZIP:

Dodge Ram 1500 Experts

  • #1
    Dan Connell
    Reputation
    6,390
  • #2
    pudgybear
    Reputation
    6,170
  • #3
    dandyoun
    Reputation
    5,570
View All

Related Models For Sale

Used Ford F-150
2,122 Great Deals out of 181,536 listings starting at $1,000
Used Chevrolet Silverado 1500
2,131 Great Deals out of 181,503 listings starting at $1,898
Used Dodge Ram 2500
138 Great Deals out of 5,061 listings starting at $2,999
Used GMC Sierra 1500
790 Great Deals out of 67,767 listings starting at $1,350
Used Toyota Tundra
439 Great Deals out of 33,419 listings starting at $1,999
Used Toyota Tacoma
562 Great Deals out of 41,710 listings starting at $2,999
Used Ford F-250 Super Duty
339 Great Deals out of 43,337 listings starting at $1,250
Used Dodge Dakota
124 Great Deals out of 3,642 listings starting at $1,650
Used Dodge Ram 3500
88 Great Deals out of 2,158 listings starting at $4,993
Used Jeep Wrangler
273 Great Deals out of 15,725 listings starting at $2,997

Used Cars For Sale

2006 Dodge Ram 1500 SLT SB For Sale
3 Great Deals out of 22 listings starting at $3,800

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.