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Live Data Reading 2001 Excursion - Any thoughts

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Live Data Reading 2001 Excursion - Any thoughts

  #1  
Old 12-07-2018, 01:05 PM
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Live Data Reading 2001 Excursion - Any thoughts

Vehicle 2001 Excursion 204000 miles, 6.8..no codes but seems to be running rich(smell fuel from time to time and once in awhile is lopes like itís loaded up with fuel). Hereís live data from Matco Scan Tool. Any thoughts?

FUEL SYS 1 CL
Fuel SYS 2 NA
calc Load % 48.2
ECT 158(yes, done after driving 5-6 miles)
STFT B1 0.0
LTFT B1 16.4
STFT B2 -3.1
LTFT B2 19.5
RPM 821
Speed 0(sitting in park in driveway)
Spark ADV 17.5
IAT 37(should be correct as outside air temp was in the teens)
MAF 1.1
TPS 20
O2 B1 S1 .615(fluctuate between 0.01-.90)
STFT B1 S1 -4.7
O2 B1 S2 0.00
STFT B1 S2 99.2

Ive pulled live data a few times, LTFT B2 always seems a tad higher than B1. Not sure if this means a faulty plug or COP on bank 2 or not.

runs great, plenty of power, gets 12-13 cruising at 75-80 unladen, so canít complain too much.

Thzbks in advance.


 
  #2  
Old 12-07-2018, 07:40 PM
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What gears are you running? What rpm are you running at 75?
 
  #3  
Old 12-07-2018, 08:31 PM
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Originally Posted by eddienelson View Post
What gears are you running? What rpm are you running at 75?
3.73 gears, just over 2000 rpm around 75.
 
  #4  
Old 12-07-2018, 09:10 PM
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Originally Posted by jbalestri View Post


3.73 gears, just over 2000 rpm around 75.
Thank you..
 
  #5  
Old 12-08-2018, 08:14 AM
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Does the ECT ever come up into normal operating range (190-210) after more than 5-6 minutes? If not, your engine is running too cold and the mixture is too rich (as shown by your LTFT numbers).
 
  #6  
Old 12-08-2018, 09:07 AM
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Originally Posted by projectSHO89 View Post
Does the ECT ever come up into normal operating range (190-210) after more than 5-6 minutes? If not, your engine is running too cold and the mixture is too rich (as shown by your LTFT numbers).
Agreed, 158 is pretty low after 5-6 miles.
 
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Old 12-08-2018, 10:03 AM
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That was a thought. It gets to operating temp rather quickly, less than 2 miles, but the gauge has read just below the icon since we bought it once warmed up. So there are two options for that, either the thermostat was replaced with a low range, 165 maybe, or the ECT sensor is faulty. Probably best to replace thermostat with a new one that I know is correct range and if it still appears cold from gauge replace ECT sensor.
 
  #8  
Old 12-08-2018, 02:53 PM
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So there are two options for that, either the thermostat was replaced with a low range, 165 maybe, or the ECT sensor is faulty.
Third option is that the current thermostat is simply stuck open.

In any event, replace it with a new one of the correct temperature range and then re-evaluate.
 
  #9  
Old 12-08-2018, 06:51 PM
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So some fool put a 165 thermostat in it. Just replaced with a 195, ECT reading 194, LTFT B1 3.1, LTFT B2 4.7. Idle steady about 800 in park.

Iím assuming a need to change plugs, running cold for who knows how long probably took its toll on them.

is that variation of 1.6% on LTFT normal?
 
  #10  
Old 12-09-2018, 09:16 AM
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I wouldn't be concerned about a couple of percentage points of variation, that's to be expected. 15 or 20 points, OTOH, is concerning, even if not over the threshold to set a DTC.
 
  #11  
Old 12-09-2018, 12:50 PM
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Thanks for this thread. Got me thinking about my thermostat. Decided to replace mine and it was way over due. I could immediately see the temp gauge climbing much faster then when the old one was in. The indicator is also a little higher on the gauge. All I have is an analog gauge so Im just guessing maybe 20 degrees or so higher. Someone said something about the A/F ratio being richer in the colder temps so Im hoping to gain a little fuel mileage and also heat the cab a little faster in the mornings.
 
  #12  
Old 12-27-2018, 02:21 PM
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So now looking for spark plug recommendations. The truck has 206k on it, so I want to change them if needed. Iíd rather go buy the plugs and if I donít need them Iíll return them then to pull them all to see if they need it. Bosch, NGK, or Autolite Iridium?? Any other brands?

The next question, and I did this on my 1999 5.4 F250, anybody recommend or say not to use a little copper anti seize on the threads?
 
  #13  
Old 12-27-2018, 02:45 PM
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Motorcraft spark plugs.
 
  #14  
Old 12-27-2018, 05:02 PM
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Motorcraft plugs, tiniest smear of nickel anti-seize on the threads, 23ft/lbs tightened down.
 
  #15  
Old 12-28-2018, 05:45 AM
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Originally Posted by maticuno View Post
Motorcraft plugs, tiniest smear of nickel anti-seize on the threads, 23ft/lbs tightened down.
Great minds think alike---this is the same procedure I use for my own Modular Motors even though its a 2 valve 5.4. I'm also one of the few who say using a torque wrench is best, so many use some sort of scale based on guesswork more than anything else. If spark plug torque wasn't important to the engine designers it wouldn't be a specification.
 


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