F150Torqued NEEDs HELP testing TORQUE PRO gauge for IMRC valve.
03-24-2019, 04:30 PM
#11
Senior Member
Perhaps you'd donate the little gizmo to a good cause (if you still have it). I'd pay shipping cost - and dissect it.
While the objective is, as @BareBonesXL said, not to build a case for or justify the IMRC or charge motion control valve. The little bastard is located back there where one can't see it - feel it - or even touch it, and where it can bind up on firewall insulation and harness wiring or brake booster hose. It is impossible to determine if it is working right or not - but OBDII provides _SOME_ information about what it is doing if I can figure out how the readings work. Torque Pro could reliably tell one if it is working ---- without having to see back there.
While the objective is, as @BareBonesXL said, not to build a case for or justify the IMRC or charge motion control valve. The little bastard is located back there where one can't see it - feel it - or even touch it, and where it can bind up on firewall insulation and harness wiring or brake booster hose. It is impossible to determine if it is working right or not - but OBDII provides _SOME_ information about what it is doing if I can figure out how the readings work. Torque Pro could reliably tell one if it is working ---- without having to see back there.
its just a black box with 2 rods coming off it, computer tells it to turn and it opens or closes the flaps
03-24-2019, 04:36 PM
#12
Senior Member
Send it to F150Torqued. He wants to figure out exactly how the PCM controls the motor.
03-24-2019, 04:59 PM
#13
Senior Member
03-24-2019, 08:46 PM
#14
LightningRod
Thread Starter
My objective is merely to 'perfect' another Torque Pro diagnostic screen to _successfully_ diagnose whether its is working properly or not and post it for my Fellow F150Forum members.
I'm not trying to chisel a free one. Mine works. I can 'see it open' with a borescope =right when OBDII CMCV (PID 1103 Bit:A4) goes true. (I haven't done it, but I have read that applying voltage to Pin 3 on the device (??) forces it open; (But who cares). I DO know (from video) that right when OBDII CVCV goes true, it opens. I just have NO way to verify if it is 75% or 90% or 100%. ALSO, I have not 'driven' with a volt meter on CMCVM (the Monitor) pin {pin 4} that provides feedback 'somehow' indicating position - (either by voltage from 0-5, or resistance from 0-??? ohms, or SOMETHING, IDK what).
From schematics, I DO know the CMCv is controlled DIrectly by the PCM {pin 50}, with direct feedback on {pin 43}. The 'output' to CMCV is identified in OBDII as 'ENABLE'. Is that perportional by square wave DC pulses like the VCT Solenoids. IDK The 'monitor' signal is direct wired back to PCM {pin 43} to give feedback (or 'monitor') position. The device is not a CAN module communicating on the CAN bus, but a discrete device hard wired to the PCM via PINs 43 and 50.
Interestingly, while I have no idea what the CMCV's electrical or electronic signal is that it presents to PIN 43 ('Monitor') at the PCM, It almost doesn't matter. It is filtered through the PCM logic (or A/D converter) and OUTPUT on PID 1634 as two binary bytes - or word. I have figured out that the 2 byte 'MONITOR' signal output on PID 1634 is VERY BIZZAR to say the least. Torque Pro's formula expression is absolutely unrestricted. I have worked feverishly attempting to develop a formula that intreprets it in volts 0-5, positional percent open from 0 to 100%, or Zero to 90 degrees --- and many others - even some ridiculous ones. Interestingly - (based on my career experience in electronic engineering and lots of machine level programming), I find that the one that works best is "Ones Compliment Addition" of the two bytes converted to % of its total 90º movement from closed to open!!!!!
Again - my objective is to make Torque Pro display an accurate position for accurate trouble shooting purposes. IE: is it functioning properly or binding somewhere keeping it from opening completely.
Bottom line @MHOWELL34 . Unfortunately I didn't keep my old one when I replaced manifold w/ CMCV valve. I will pay shipping (or paypal a palm scratch or something) for an old one that I can tear apart to try to figure out. If you PM me an email address, I'll give you my address.
03-25-2019, 11:42 AM
#15
05 5.4l 3v s.crew lariat
I think this is a good project
But I'm not experienced enough with torque pro to give a competent evaluation . I have yet to load a csv file ,just too much going on . Perhaps I will try at one point again . I wish I was as as good as many people on here so I stand aside for that reason . I better stay on the porch .
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F150Torqued (03-27-2019)
03-27-2019, 04:03 PM
#17
Senior Member
I've driven a few times and the IMRCM gauge will read 0%, 25%, 75%, and 100% depending on load, so it seems to be working.
I'll try to grab some screen shots at various load points and report back with more parameters.
I'll try to grab some screen shots at various load points and report back with more parameters.
The following users liked this post:
F150Torqued (03-27-2019)
The following users liked this post:
F150Torqued (03-27-2019)
03-27-2019, 05:49 PM
#19
LightningRod
Thread Starter
Do you 'think' the PCM is controlling it proportionally? (This is ONE of my un-answered questions about the Gizzmo. If so, It is going to have to be by using 'Pulse Width' or 'Duty Cycle' type signal on the control wire. (There is only 4 wires. "+", "Gnd", "control", and "Monitor".)