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Short & Long Term Fuel Trim Readings

  #1  
Old 12-26-2012, 09:52 AM
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JWA
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Short & Long Term Fuel Trim Readings

Chasing a bit of a minor assumed misfire, slight rough running at both idle and driving. Have changed plugs, no MIL or codes, pending or otherwise....

Can I post the print out data from my recent drive cycle results and get some interpretations what its showing me?
 
  #2  
Old 12-26-2012, 07:06 PM
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They probably won't help but go ahead.
 
  #3  
Old 12-26-2012, 08:15 PM
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Originally Posted by projectSHO89 View Post
They probably won't help but go ahead.

Here goes nothing then.............!


2003 Ford E-250 L = 5.4

Record Data

FRAME: -1 TM: -2.2

MIL STATUS Off
ABSLT TPS(%) 29.0
ENG SPEED(RPM) 2048
CALC LOAD(%) 50.2
MAF(LB/M) 5.96
COOLANT(F) 189
IAT(F) 50
IGN ADV() 33.5
ST FTRM1(%) 2.3
ST FTRM2(%) 0.8
LT FTRM1(%) 0.0
LT FTRM2(%) 0.0
VEH SPEED(MPH) 66
FUEL SYS 1 CLSD
FUEL SYS 2 N/A
O2S11(V) 0.120
ST FTRM11(%) 2.3
O2S12(V) 0.775
O2S21(V) 0.820
ST FTRM21(%) -3.1
MIL DIST(mi) 0
OBD2 STAT CA

---------------------

FRAME: 0 TM: 0.0

MIL STATUS Off
ABSLT TPS(%) 29.0
ENG SPEED(RPM) 2047
CALC LOAD(%) 50.2
MAF(LB/M) 5.90
COOLANT(F) 189
IAT(F) 50
IGN ADV() 33.5
ST FTRM1(%) 0.0
ST FTRM2(%) 1.6
LT FTRM1(%) 0.0
LT FTRM2(%) 0.0
VEH SPEED(MPH) 66
FUEL SYS 1 CLSD
FUEL SYS 2 N/A
O2S11(V) 0.640
ST FTRM11(%) 1.6
O2S12(V) 0.775
O2S21(V) 0.155
ST FTRM21(%) 3.1
MIL DIST(mi) 0
OBD2 STAT CA

---------------------

FRAME: 1 TM: 2.1

MIL STATUS Off
ABSLT TPS(%) 28.6
ENG SPEED(RPM) 2042
CALC LOAD(%) 48.2
MAF(LB/M) 5.82
COOLANT(F) 189
IAT(F) 50
IGN ADV() 34.5
ST FTRM1(%) 0.0
ST FTRM2(%) -1.6
LT FTRM1(%) -1.6
LT FTRM2(%) 0.0
VEH SPEED(MPH) 66
FUEL SYS 1 CLSD
FUEL SYS 2 N/A
O2S11(V) 0.825
ST FTRM11(%) -3.9
O2S12(V) 0.775
O2S21(V) 0.545
ST FTRM21(%) -1.6
MIL DIST(mi) 0
OBD2 STAT CA

---------------------

FRAME: 2 TM: 4.2

MIL STATUS Off
ABSLT TPS(%) 28.6
ENG SPEED(RPM) 2047
CALC LOAD(%) 47.5
MAF(LB/M) 5.61
COOLANT(F) 189
IAT(F) 48
IGN ADV() 34.5
ST FTRM1(%) -1.6
ST FTRM2(%) -2.3
LT FTRM1(%) -1.6
LT FTRM2(%) 0.0
VEH SPEED(MPH) 66
FUEL SYS 1 CLSD
FUEL SYS 2 N/A
O2S11(V) 0.350
ST FTRM11(%) -1.6
O2S12(V) 0.775
O2S21(V) 0.830
ST FTRM21(%) -2.3
MIL DIST(mi) 0
OBD2 STAT CA

---------------------

FRAME: 3 TM: 6.2

MIL STATUS Off
ABSLT TPS(%) 28.2
ENG SPEED(RPM) 2046
CALC LOAD(%) 47.5
MAF(LB/M) 5.64
COOLANT(F) 189
IAT(F) 50
IGN ADV() 34.5
ST FTRM1(%) 2.3
ST FTRM2(%) -3.9
LT FTRM1(%) -1.6
LT FTRM2(%) 0.0
VEH SPEED(MPH) 66
FUEL SYS 1 CLSD
FUEL SYS 2 N/A
O2S11(V) 0.145
ST FTRM11(%) 2.3
O2S12(V) 0.770
O2S21(V) 0.840
ST FTRM21(%) -3.1
MIL DIST(mi) 0
OBD2 STAT CA

---------------------

FRAME: 4 TM: 8.5

MIL STATUS Off
ABSLT TPS(%) 28.2
ENG SPEED(RPM) 2040
CALC LOAD(%) 47.5
MAF(LB/M) 5.64
COOLANT(F) 189
IAT(F) 48
IGN ADV() 34.5
ST FTRM1(%) 2.3
ST FTRM2(%) 3.1
LT FTRM1(%) -1.6
LT FTRM2(%) 0.0
VEH SPEED(MPH) 65
FUEL SYS 1 CLSD
FUEL SYS 2 N/A
O2S11(V) 0.135
ST FTRM11(%) 2.3
O2S12(V) 0.770
O2S21(V) 0.150
ST FTRM21(%) 3.1
MIL DIST(mi) 0
OBD2 STAT CA


Thanks!
 
  #4  
Old 12-28-2012, 06:20 AM
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Go look at your MISFIREPIDs in Mode 6 if you suspect a misfire.
 
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