A riddle for the experts
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hrvstr22 (10-05-2016)
08-23-2016, 07:24 AM
#22
Junior Member
Thread Starter
Could have been fuel i guess...could have been a cat problem too but i doubt it. I will get some cleaner and run thru it. So far so good. What would make it shift from 2nd to 3rd to fast? Really seems like that was the issue.
08-23-2016, 08:53 AM
#23
LightningRod
@hrvstr22
A possibility emerges by reviewing your posts in this thread and considering several statements / symptoms together. Forgive me, but I have taken the liberty of modifying these "Quotes" of your words ONLY to focus attention on items I am considering pertinent to my comment that follows.
You seem to have done a number of different (and good) service procedures and taken and followed various member suggestions, but the problem is intermittent and still with you.
Based on the above symptoms and statements, I wonder if you could have a "sticky" TCC Solenoid. Heat is a transmissions worst enemy and you started this thread by mentioning stop / go driving, HOT weather, and end of the day, shifts rough -- etc, etc.
I know you said you had a trans guy check out the trans - but the problem is intermittent. You have no TDC, so it must be assumed it is not a HARD failure or electrical circuit. But that would not preclude a sticy solenoid causing the Torque converter clutch from releasing when it should. May be that has something to do with your latest comment.
I don't find mention of vehicle mileage or last trans fluid change, and do not recommend just throwing parts into the trans. But - if you think there could be merit to this theory - it would not hurt to put some BG44 Transmission Flush in it, run it for 50-100 miles with freequent actuations of the overdrive switch, then replace the trans fluid and trans filter.
Good Luck
A possibility emerges by reviewing your posts in this thread and considering several statements / symptoms together. Forgive me, but I have taken the liberty of modifying these "Quotes" of your words ONLY to focus attention on items I am considering pertinent to my comment that follows.
... - (short stop n go) and it was hot outside.
... Toward the end of the day ...
... As I shifted to drive the truck stalled.
... On the way home it started acting up again.
... I noticed that it was happening in certain gears.
... as it shifts to second it boggs down and seems to miss and carry on.
... If I floor it it shifts kind of rough and takes off.
... Trans does not seem to be slipping.
... Toward the end of the day ...
... As I shifted to drive the truck stalled.
... On the way home it started acting up again.
... I noticed that it was happening in certain gears.
... as it shifts to second it boggs down and seems to miss and carry on.
... If I floor it it shifts kind of rough and takes off.
... Trans does not seem to be slipping.
Based on the above symptoms and statements, I wonder if you could have a "sticky" TCC Solenoid. Heat is a transmissions worst enemy and you started this thread by mentioning stop / go driving, HOT weather, and end of the day, shifts rough -- etc, etc.
I know you said you had a trans guy check out the trans - but the problem is intermittent. You have no TDC, so it must be assumed it is not a HARD failure or electrical circuit. But that would not preclude a sticy solenoid causing the Torque converter clutch from releasing when it should. May be that has something to do with your latest comment.
I don't find mention of vehicle mileage or last trans fluid change, and do not recommend just throwing parts into the trans. But - if you think there could be merit to this theory - it would not hurt to put some BG44 Transmission Flush in it, run it for 50-100 miles with freequent actuations of the overdrive switch, then replace the trans fluid and trans filter.
Good Luck
Last edited by F150Torqued; 08-23-2016 at 08:56 AM.
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hrvstr22 (10-05-2016)
10-05-2016, 09:53 AM
#25
Junior Member
Thread Starter
ok guys heres the latest...
I went ahead and changed the torque converter clutch solenoid as well as filter. I did have a couple metal slivers on the magnet. (Not sure how much is to much) The truck ran great for two and a half weeks and during that time i hauled a camper into the mountains of Pennsylvania. The day after returning home i started the truck up to head to work and it started acting up again. A few miles into the drive it straightened up and ran normal. It does this nearly every time the truck is cold now. It hasn't stalled but when coming to a stop it boggs down and i loose rpm like it is going to stall but recovers. When shifting out of fist gear it looses power like it is in third gear at to low of a speed. if i press the gas harder it downshifts and takes off fine. I am really getting concerned because i have a trip to Florida(1000 miles) with the camper coming at the end of the month.
Thanks for all the help guys i truly appreciate it.
I went ahead and changed the torque converter clutch solenoid as well as filter. I did have a couple metal slivers on the magnet. (Not sure how much is to much) The truck ran great for two and a half weeks and during that time i hauled a camper into the mountains of Pennsylvania. The day after returning home i started the truck up to head to work and it started acting up again. A few miles into the drive it straightened up and ran normal. It does this nearly every time the truck is cold now. It hasn't stalled but when coming to a stop it boggs down and i loose rpm like it is going to stall but recovers. When shifting out of fist gear it looses power like it is in third gear at to low of a speed. if i press the gas harder it downshifts and takes off fine. I am really getting concerned because i have a trip to Florida(1000 miles) with the camper coming at the end of the month.
Thanks for all the help guys i truly appreciate it.
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hrvstr22 (10-07-2016)
10-07-2016, 11:21 AM
#27
LightningRod
@hrvstr22
Sorry the problem persists. I have reviewed all the posts of this thread - and one thing that strikes me is your willingness to take members suggestions to heart and cooperate. You've changed: Fuel filter; Fuel supplier; FDPM; Foam seal around air intake to filter box; Trans clutch solenoid; Cleaned PCM plugs Checked injectors (connections); and possibly other things too. AND I presume still no DTC or codes.
Couple of symptoms seem to still stand out in all the posts: Symptom is Intermittent, - one of the hardest to pin down - and may be related to temperature.
Intermittent symptoms certainly suggest likely electrical connection (either in wiring or within a component).
A couple of thoughts on that:
The MOST critical components are monitored by the PCM for electrical integrity such as shorts / opens and produce DTC codes. Examples are O2 Sensors, Injectors, COPs, CHT, Cam Position sensors, Crank Pos Sensor, Throttle position sensor and probably others I'm not aware of or overlooked.
A couple that come to mind that "could" effect engine operating parameters to be disruptive of idle (and not cause complete stall out) might be the "Ambient air temperature sensor", the "intake air temperature sensor" or "Barometric Pressure sensor". I do not know if the PCM monitors these for electrical integrity or not. (Don't even know where the Baro sensor IS - YET!, but I'm looking for you). But the "Ambient air temp sensor" is on the front radiator brace just below your hood latch. The "intake Air Temp sensor" is an integral part of the MAF on the intake air box.
The MAF being the most suspect in my view. Since you have cleaned it already, and have NO codes to go by, I might throw another part at the problem and spring for a replacement before taking off on that long trip.
If you ever get a code ... Be sure to get the "Freeze Frame" data. It could certainly point to what is out of bounds and lead you to the source of the intermittent problem.
JMO & thoughts.
Good luck & hope the reasons for the Florida trip haven't taken a serious turn for the worse.
Sorry the problem persists. I have reviewed all the posts of this thread - and one thing that strikes me is your willingness to take members suggestions to heart and cooperate. You've changed: Fuel filter; Fuel supplier; FDPM; Foam seal around air intake to filter box; Trans clutch solenoid; Cleaned PCM plugs Checked injectors (connections); and possibly other things too. AND I presume still no DTC or codes.
Couple of symptoms seem to still stand out in all the posts: Symptom is Intermittent, - one of the hardest to pin down - and may be related to temperature.
Intermittent symptoms certainly suggest likely electrical connection (either in wiring or within a component).
A couple of thoughts on that:
The MOST critical components are monitored by the PCM for electrical integrity such as shorts / opens and produce DTC codes. Examples are O2 Sensors, Injectors, COPs, CHT, Cam Position sensors, Crank Pos Sensor, Throttle position sensor and probably others I'm not aware of or overlooked.
A couple that come to mind that "could" effect engine operating parameters to be disruptive of idle (and not cause complete stall out) might be the "Ambient air temperature sensor", the "intake air temperature sensor" or "Barometric Pressure sensor". I do not know if the PCM monitors these for electrical integrity or not. (Don't even know where the Baro sensor IS - YET!, but I'm looking for you). But the "Ambient air temp sensor" is on the front radiator brace just below your hood latch. The "intake Air Temp sensor" is an integral part of the MAF on the intake air box.
The MAF being the most suspect in my view. Since you have cleaned it already, and have NO codes to go by, I might throw another part at the problem and spring for a replacement before taking off on that long trip.
If you ever get a code ... Be sure to get the "Freeze Frame" data. It could certainly point to what is out of bounds and lead you to the source of the intermittent problem.
JMO & thoughts.
Good luck & hope the reasons for the Florida trip haven't taken a serious turn for the worse.
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hrvstr22 (10-07-2016)
10-07-2016, 03:14 PM
#28
Junior Member
Thread Starter
Thanks for your comments guys. I haven't checked for codes in a few weeks since it has popped back up. I will have it checked tonight! I will definitely order a new maf sensor as soon as i am able. Its worth a shot. I think ill try to get motorcraft plugs in it before the trip as well just to eliminate it as a possibility. Thanks again for your time. I have learned a lot already.
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F150Torqued (10-10-2016)
10-10-2016, 04:26 PM
#30
IAC valve ?