Idle issue
Senior Member
Joined: Mar 2021
Posts: 4,798
Likes: 2,396
Adding to the fuel.
There is a seal down lower in the neck you have to open.
If that seal is faulty you will get a code on it for tank pressure/ Vacuum leak test failures. Since you have no code for this, your just not getting it open with device your trying to use. It needs to be straight sides and smooth surface.
The proper insert for this was supplied with your truck. They are available after market or from Dealer parts dept. for Emg. fueling and additives use.
Spraying cleaner in the intake will not clean anything that fast.
The cleaner needs to be in the fuel and work over time.
.
Also the EVAP system can cause unstable Idle.
.
I agree that you appear to have some issue on Bank 2 with Cams control function.
Good luck.
There is a seal down lower in the neck you have to open.
If that seal is faulty you will get a code on it for tank pressure/ Vacuum leak test failures. Since you have no code for this, your just not getting it open with device your trying to use. It needs to be straight sides and smooth surface.
The proper insert for this was supplied with your truck. They are available after market or from Dealer parts dept. for Emg. fueling and additives use.
Spraying cleaner in the intake will not clean anything that fast.
The cleaner needs to be in the fuel and work over time.
.
Also the EVAP system can cause unstable Idle.
.
I agree that you appear to have some issue on Bank 2 with Cams control function.
Good luck.
Senior Member
Joined: Mar 2021
Posts: 114
Likes: 47
thank you for the great info. How can I get that software to scan and such? it might be working investing on one. And when I changed the solenoids there was just regular oil residue . I change oil every 5k miles with fully synthetic mobile 1 5w-20. When I opened the valve cover I really didn’t notice those or see those filters there. The idle got worse today and then it threw that code that I mentioned . I am also gonna run some sea foam in the oil just to clean up any extra **** that I can’t see but usually the oil is not bad in color and the valve cover looked pretty good to me from inside .
You may find other codes when using this software.
These filters screens can only be accessed when removing the phasers. They are inside the end of the camshaft where the phasers attach.
Some people have had success with the Seafoam in the oil treatment.
There is lots of info on F150Forum.com about using Forscan.
As another post suggested you could have other problems that would not necessarily throw a code. I don't think a 2015 5.0 has the coking problem because it came about with the direct injection version in 2018?
Thread Starter
Senior Member
Joined: Jan 2022
Posts: 124
Likes: 6
From: Florida
Adding to the fuel.
There is a seal down lower in the neck you have to open.
If that seal is faulty you will get a code on it for tank pressure/ Vacuum leak test failures. Since you have no code for this, your just not getting it open with device your trying to use. It needs to be straight sides and smooth surface.
The proper insert for this was supplied with your truck. They are available after market or from Dealer parts dept. for Emg. fueling and additives use.
Spraying cleaner in the intake will not clean anything that fast.
The cleaner needs to be in the fuel and work over time.
.
Also the EVAP system can cause unstable Idle.
.
I agree that you appear to have some issue on Bank 2 with Cams control function.
Good luck.
There is a seal down lower in the neck you have to open.
If that seal is faulty you will get a code on it for tank pressure/ Vacuum leak test failures. Since you have no code for this, your just not getting it open with device your trying to use. It needs to be straight sides and smooth surface.
The proper insert for this was supplied with your truck. They are available after market or from Dealer parts dept. for Emg. fueling and additives use.
Spraying cleaner in the intake will not clean anything that fast.
The cleaner needs to be in the fuel and work over time.
.
Also the EVAP system can cause unstable Idle.
.
I agree that you appear to have some issue on Bank 2 with Cams control function.
Good luck.
Thread Starter
Senior Member
Joined: Jan 2022
Posts: 124
Likes: 6
From: Florida
The software Forscan is free. All you need is an adapter & computer. There are many adapters that will work but this is the one I got: OBDLink EX.
You may find other codes when using this software.
These filters screens can only be accessed when removing the phasers. They are inside the end of the camshaft where the phasers attach.
Some people have had success with the Seafoam in the oil treatment.
There is lots of info on F150Forum.com about using Forscan.
As another post suggested you could have other problems that would not necessarily throw a code. I don't think a 2015 5.0 has the coking problem because it came about with the direct injection version in 2018?
You may find other codes when using this software.
These filters screens can only be accessed when removing the phasers. They are inside the end of the camshaft where the phasers attach.
Some people have had success with the Seafoam in the oil treatment.
There is lots of info on F150Forum.com about using Forscan.
As another post suggested you could have other problems that would not necessarily throw a code. I don't think a 2015 5.0 has the coking problem because it came about with the direct injection version in 2018?
would the forscan show if the phasers are not good or anything like that also?
Senior Member
Joined: Mar 2021
Posts: 114
Likes: 47
In your case the first step is to obtain all possible codes which you may not have been getting with whatever code reader you had. ForScan will do that, then you need to verify whether the VCT system is working correctly or not. If it’s not working correctly then you need to interpret the PID’s reading and implement some trouble shooting skills. For example, if you pull a solenoid connector does the problem get worse, throw some codes or stay the same. So it’s a series of what if’s until you can identify the issues. If all the sensors & solenoids are determined to be OK, then the PID’s values may give you a hint.
I think you still have a chance that your VCT system is OK and some other problem is happening. ForScan may give you some codes that your other reader could not read.
Thread Starter
Senior Member
Joined: Jan 2022
Posts: 124
Likes: 6
From: Florida
It will tell you if the VCT system is working correctly or not. If it’s not working correctly you can isolate the problem to bank 1 or 2 and either intake or exhaust. It’s not going to tell you what to do. That’s where troubleshooting skills come into play.
In your case the first step is to obtain all possible codes which you may not have been getting with whatever code reader you had. ForScan will do that, then you need to verify whether the VCT system is working correctly or not. If it’s not working correctly then you need to interpret the PID’s reading and implement some trouble shooting skills. For example, if you pull a solenoid connector does the problem get worse, throw some codes or stay the same. So it’s a series of what if’s until you can identify the issues. If all the sensors & solenoids are determined to be OK, then the PID’s values may give you a hint.
I think you still have a chance that your VCT system is OK and some other problem is happening. ForScan may give you some codes that your other reader could not read.
In your case the first step is to obtain all possible codes which you may not have been getting with whatever code reader you had. ForScan will do that, then you need to verify whether the VCT system is working correctly or not. If it’s not working correctly then you need to interpret the PID’s reading and implement some trouble shooting skills. For example, if you pull a solenoid connector does the problem get worse, throw some codes or stay the same. So it’s a series of what if’s until you can identify the issues. If all the sensors & solenoids are determined to be OK, then the PID’s values may give you a hint.
I think you still have a chance that your VCT system is OK and some other problem is happening. ForScan may give you some codes that your other reader could not read.
Thread Starter
Senior Member
Joined: Jan 2022
Posts: 124
Likes: 6
From: Florida
That's the DTC code I got with the information about the truc
this diagram above was when I start the data but I was on full stop at idle
that's when it start to stall there is a peak between them
this above was doing when it was trying too stall and the rpm will drop low
same when it start to stall every few mins or secs
I don't know what I am looking for but I selected everything vct intake related. I don't know if those codes were older codes or current codes that I should reset them? I reset the main one after I took a pic to see if something will come back or come again and it didn't come back
hope those can help with the problem, any feedback will be appreciated
Thread Starter
Senior Member
Joined: Jan 2022
Posts: 124
Likes: 6
From: Florida
Also after clearing all codes the only one that stayed is p2535 ignition switch on/start position circuit high. But it still try to stall when warm at stops not all the time but sometimes
Thread Starter
Senior Member
Joined: Jan 2022
Posts: 124
Likes: 6
From: Florida
5 Year Member
Joined: Nov 2018
Posts: 6,728
Likes: 3,950
From: Calgary, Alberta
You likely have a wiring problem or a bad start switch.
P2335 - Ignition Switch Run/Start Position Circuit High
Description:
This DTC sets when the PCM detects voltage on the crank detect circuit while the engine is running.
Possible Causes:
P2335 - Ignition Switch Run/Start Position Circuit High
Description:
This DTC sets when the PCM detects voltage on the crank detect circuit while the engine is running.
Possible Causes:
- BCM
- Ignition switch
- PCM
- Wiring, terminals, or connectors
Last edited by 52merc; Jan 4, 2023 at 06:01 PM.