1997 Ford F-150 operating parameters

Tiny
AEOLIANRANE
  • MEMBER
  • 1997 FORD F-150
  • V8
  • 4WD
  • AUTOMATIC
  • 147,000 MILES
Where can I find a list of engine operating parameters. I have an Actron cp9145 and in im readiness test it is showing my engine at 20% load at idle. Also abslt tps at 18.8. All may be good, but I don't anything to compare it to. The mass air unit is new.
Sunday, January 11th, 2009 AT 12:47 PM

9 Replies

Tiny
RACEFAN966
  • MECHANIC
  • 5,029 POSTS
Do you have any codes? Are you having any problems with the running of your truck? Get back to me as then I can be of better help.
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Monday, January 12th, 2009 AT 9:58 AM
Tiny
AEOLIANRANE
  • MEMBER
  • 16 POSTS
Po304(misfire #4). Installed new coils and wires. Missed one. Will fix and clear code.
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Tuesday, January 13th, 2009 AT 7:14 AM
Tiny
RACEFAN966
  • MECHANIC
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Ok let me know what you find after that. If you need anything else just ask. Thanks.
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Tuesday, January 13th, 2009 AT 10:27 AM
Tiny
AEOLIANRANE
  • MEMBER
  • 16 POSTS
Cleared codes. MY anylizer is telling me that % of load at idle is between 18 and 23% is that correct?
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Tuesday, January 13th, 2009 AT 11:09 AM
Tiny
RACEFAN966
  • MECHANIC
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% of load from what?
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Wednesday, January 14th, 2009 AT 9:49 AM
Tiny
AEOLIANRANE
  • MEMBER
  • 16 POSTS
The engine. (Answer to your question) Also my abslt tps% is 18.8%. Is that correct. I have an engine anylizer. I can see what my os sensor short term correction is based on my % of load, they are operating correctly. All other vehichles that I tested, at idle their tps was at 0%. Mine tested ok. 1 volt to ground and 5 volts to 0 at wot koeo. Engine running at idle tps was at 18.8%.
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Monday, January 19th, 2009 AT 7:21 PM
Tiny
RACEFAN966
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I don't use percentages I use voltage. So with the key on engine off the voltage on the reference wire should be.8 volts and should increase steadly to 4.5 to 5 volts with no glitches or drops. So if it does that then it is working right.
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Monday, January 19th, 2009 AT 7:25 PM
Tiny
AEOLIANRANE
  • MEMBER
  • 16 POSTS
It started out more than.8 and didn't go above 4.2 at wot. Purchased new tps but could't screws out. I think they are original, stuck real good. Have to use easy out in the am. I tested my mass air sensor and in voltage terms it tested ok. 1.4 volts at 2000 rpm in park in garage.(Exhaust outside).
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Monday, January 19th, 2009 AT 7:51 PM
Tiny
RACEFAN966
  • MECHANIC
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Sounds like a tps problem as the voltage reading you give me. The screws are put in with thread locker so they will be hard to get out.
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Monday, January 19th, 2009 AT 8:00 PM

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