hello everyone i have an 06 f250 that has been studded, deleted. Recently i went to drive the truck and it fired up good, let it warm up some then went to start driving. I got about 1/4 mile down the road and i noticed the truck was kind of running like ****, pulled over real fast and checked the codes. i noticed i had a new code for a Crankshaft Position Sensor. pulled it back into yard and shut it off. Took me about 1 1/2 weeks to get the part and get around to putting it in. Put the part in and realized my truck was completely dead, charged both the batteries and got it to crank. now im stuck on a crank no start issue. I had a buddy come over and hook his fancy scanner up to the truck and we have concluded that there a no longer any codes for crank or cam sensor, ruled out hpop issues, low pressure issues. the interesting thing is that the voltage coming into the ficm starts at 12 and slowly will drop by .5 volts when cranking all the way down to 7.5 volts. But will have a good reading of 47.5-48 volts while at 7.5 input. Hes gonna get a confirmed working ficm and put that in there and go from there. i am also going to ohm out both the sensors for cam and crank tomorrow to make sure those are good although getting no codes for either. forgot to add that we ruled out fuel as an issue as well. all the readings for that came back good.
tarnold22
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just put in a new camshaft position sensor as that was what the code was saying after clearing multiple times. still no start, is there anyway to check the wiring on the harness going to the pcm? really wanna get this thing going
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hey so if im not getting ficm sync does that narrow it down to cam and crank issue or is it still worth it to replace ficm. im still having the no start, i firstly replaced the crank sensor with ford oem, then it started to throw the cam sensor code so i replaced that with a non oem they had at the autostore. is it possible thats a bad sensor or is it more than likely bad cam sensor wiring, how do i go about fixing the cam sensor wiring, and or check to make sure that the issue, if im getting rpm then crank sensor is good?
If you have a stable rpm signal, then the crank sensor is PROBABLY good.
Your "lack of Sync" issue very well could be due to an aftermarket CMP sensor. I have seen this multiple times.
It could also be a FICM issue, or an issue with the wiring between the PCM and FICM, or even (rare) a PCM issue.
Your "lack of Sync" issue very well could be due to an aftermarket CMP sensor. I have seen this multiple times.
It could also be a FICM issue, or an issue with the wiring between the PCM and FICM, or even (rare) a PCM issue.
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okay now how do i test to see if the sensor is good because at first i replaced the crankshaft sensor and that started the no start, before that the truck started as i stated then it sat for two weeks i replaced the sensor and the truck would just crank. then the scanner threw the camshaft pos sensor code, so i replaced that with non oem. can i check the continuity of the pigtail if so how do i do that?
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okay, my issue is i cant seem to get the code to replicate. i cleared it after i change out the cam sensor and ive crank a good bit and it wont pop back up, but it still will not start
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okay so i need help with how to get injector pulse width, and v-reference voltage unless thats just battery voltage. i have a scangauge II im using to gather all of the other data. im gonna give the batteries one good charge and i will get back to you with all the other information in an hour or two.
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thanks man, ill get back with you soon. appreciate it
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rpm-53
ficm M power-47.5
ICP- 1756
ficm sync- 0
ficm V power- started at 12.5 on crank and slowly dropped to 10.5 in 5 seconds
ficm L power- started at 12 on crank and slowly dropped, got to 10 in 5 seconds
IPW- 0
ICP V- 0.12
IPR- 75
v-reference- 5
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okay, the crank sounds much faster then i would assume 53 rpm sounds. what would cause this number to be faulty or what would cause this to be so low. it was cranking strong, at least sounds so, wasnt a slow crank. i just replaced the crank sensor with a new motocraft 2 weeks ago.
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other than the rpm, by looking at the data what would he the issue causing a no start.
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i understand i am not getting sufficient rpms, or ficm sync, but correct if im wrong, i thought 1700 psi is more than enough how do i firstly go about getting the rpms up? then fixing the ficm sync?
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so then i have a hpop issue too? when we used the snap on scanner, we were getting good icp there too. like it said actual pressure and it was low then a few cranks later, it went back up. where do i go from here? i really want to get this thing on the road again
You don't really know what actual pressure is unless you used a manual gauge. With a scan tool you ONLY look at the sensor output voltage.
Maybe the ICP sensor is not working, but there is no evidence of it not working.
It is very clear - you have proper v-reference voltage (feeding the ICP sensor), and if the sensor is working, there is a defined output curve for the pressure it sees. Ford has published a table on it. I have that table, and I created a graphical relationship for voltage vs pressure.
It is what it is.
Anyway. there are numerous reasons for not having high pressure oil pressure. It isn't just the HPOP .......
Maybe the ICP sensor is not working, but there is no evidence of it not working.
It is very clear - you have proper v-reference voltage (feeding the ICP sensor), and if the sensor is working, there is a defined output curve for the pressure it sees. Ford has published a table on it. I have that table, and I created a graphical relationship for voltage vs pressure.
It is what it is.
Anyway. there are numerous reasons for not having high pressure oil pressure. It isn't just the HPOP .......
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thanks for all the info it has been very helpful to talk to someone that’s knowledgeable on these engines. where do i go from here? is it best to just take it to a shop and put money into it or what are my diagnostic steps?
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