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I changed the scales on your ICP plugged in and ICP unplugged charts to get a better look. Like you said - no change to the idle surge. Wish I could tell you something you don't know.
Being that there is no change when you unplug the ICP could this lead back to the pcm?
I know I only have the single alternator setup but decided to check voltage this morning while doing my morning inspection. KOEO 11.76v untill gp kicked out then back up to 12.4v. Again not sure if it has any relevance considering the differences between our charging systems, but maybe it helps. I didn't think to monitor after startup maybe I can give it a go this afternoon if I get some free time
I know I only have the single alternator setup but decided to check voltage this morning while doing my morning inspection. KOEO 11.76v untill gp kicked out then back up to 12.4v. Again not sure if it has any relevance considering the differences between our charging systems, but maybe it helps. I didn't think to monitor after startup maybe I can give it a go this afternoon if I get some free time
Thats great info! Thank you. I wouldn't worry about monitoring after start up, just the fact that yours goes above 12 volts koeo helps alot. Being that mine is supposed to be that way I will look further into it, I may just get my pcm tested so I can cross that off the list
Yes yes it has a Hydra, unfortunately I can't remove it because I have 160 injectors. A lot of these symptoms were around before I got the Hydra though
Yes yes it has a Hydra, unfortunately I can't remove it because I have 160 injectors. A lot of these symptoms were around before I got the Hydra though
Have you tried having a tune adjusted to see if this issue can be corrected?
I have had this issue while having tunes played with to try and get rid of idle knock, and some of the variations caused the idle issues you have, tunes re adjusted and went back to normal.
jstihl, I moved the raw data log off the PID CSV tab and have uploaded it here as an attachment. This way you can view it without waiting to be on your computer.
Also, @cleatus12r has shown us that just about any injector will run on a stock/OEM tune. Although, this may not be a good enough running condition for you to identify if the surge condition still exists. So, this may not be a worthwhile test for you to perform. If you have your PCM tested, I know Jonatan at DTC is capable of flashing your PCM for single shot injectors. Something else to consider...
I will try to get out and test the truck alternator wire as Udsuth78 did, but I too have just one alternator and am fairly busy around the house this week preparing for guests from out of state on Thanksgiving. I figured uploading the data log spreadsheet and mentioning the tuning possibility was the least I could do in order to help you out.
I know I only have the single alternator setup but decided to check voltage this morning while doing my morning inspection. KOEO 11.76v untill gp kicked out then back up to 12.4v. Again not sure if it has any relevance considering the differences between our charging systems, but maybe it helps. I didn't think to monitor after startup maybe I can give it a go this afternoon if I get some free time
Originally Posted by jstihl
Thats great info! Thank you. I wouldn't worry about monitoring after start up, just the fact that yours goes above 12 volts koeo helps alot. Being that mine is supposed to be that way I will look further into it, I may just get my pcm tested so I can cross that off the list
Just want to confirm what we are talking about here. Jstihl and I have an issue with the "I" circuit not going above 12V. @udsuth78 - was your measurement on the "I" circuit or the battery voltage?
Just want to confirm what we are talking about here. Jstihl and I have an issue with the "I" circuit not going above 12V. @udsuth78 - was your measurement on the "I" circuit or the battery voltage?
I checked at the 2 wire plug on the alternator. Jstihl said green wire, but both are green red stripe on mine. It was the wire on the right side (PS) of plug. I'll double check results this afternoon and test other wire as well just to be sure. I'm stuck in court right now waiting to testify in a civil case that has nothing to do with me.
jstihl, I moved the raw data log off the PID CSV tab and have uploaded it here as an attachment. This way you can view it without waiting to be on your computer.
Also, @cleatus12r has shown us that just about any injector will run on a stock/OEM tune. Although, this may not be a good enough running condition for you to identify if the surge condition still exists. So, this may not be a worthwhile test for you to perform. If you have your PCM tested, I know Jonatan at DTC is capable of flashing your PCM for single shot injectors. Something else to consider...
I will try to get out and test the truck alternator wire as Udsuth78 did, but I too have just one alternator and am fairly busy around the house this week preparing for guests from out of state on Thanksgiving. I figured uploading the data log spreadsheet and mentioning the tuning possibility was the least I could do in order to help you out.
Thank you for doing that Sous, you have been a huge help, I definitely appreciate it. I didn't even think about Johnathan flashing the pcm while he has it, that is a great idea.i wouldn't worry about testing the alternator, if udsuth78 can check his that should be good. Thanks again
I checked at the 2 wire plug on the alternator. Jstihl said green wire, but both are green red stripe on mine. It was the wire on the right side (PS) of plug. I'll double check results this afternoon and test other wire as well just to be sure. I'm stuck in court right now waiting to testify in a civil case that has nothing to do with me.
Sorry about that I thought they all had red and green. If you disconnect the alternator clip and turn it so the mating surface is facing you with the push button clip on the top, it will be the wire on the left.
Alright just checked it again and I believe I was on the wrong terminal. One is always hot and the other was just showing mV until koeo. So that post dropped to 11.4v then climbed to 11.7 untill glow plugs shut off then 12.4. After start up showed 12.1 then slowly started to climb to 14.1.
Alright just checked it again and I believe I was on the wrong terminal. One is always hot and the other was just showing mV until koeo. So that post dropped to 11.4v then climbed to 11.7 untill glow plugs shut off then 12.4. After start up showed 12.1 then slowly started to climb to 14.1.
In post number 58 bwst posted a pic of the alternator clip while it's plugged in. When plugged in its the wire on the driver side. Well this is good news at least we know that the Ford service manual isn't wrong, now just have to figure out why we have low voltage. Thanks again for checking that out udsuth78
