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View Full Version : Finalizing install on a 3.5L Ecoboost, a few last questions...


diaz1510
05-01-2021, 07:21 PM
Questions for @Richard_L but anyone knowledgeable, feel free to chime in.

It’s been a very long time and this project has been slowly coming together for over 2 years now, haha. I am finally at the point in my car build where all components, hoses, brackets and wires have been run and my very last step is to finally tap into the ECM wires. That is the absolute final step and I can begin testing and tuning the vehicle. But before I cut into the ECM wiring, I wanted to get some clarification on a few things.

I’ve included the drawing @Richard_L sent me last year so that we can be on the same page.

https://dm2301files.storage.live.com/y4mkm1BG_l4EEfPx5dYW0l40fFBiYNvREzTGb2Xp QBT7QfuLlfeHIvgZdxy2Nqgy-tbXWHQzB3l_CkhU7xdiI3OdpexpoB2kONzVDzfSg nBR08rTgTpjdKqaVBPoukQZ0jEUSO_GrXLJ_Y5js FBsREZw1Vzgg9q-iBam6uA51ZNC_O1TdOK4ABJBmu2g3vCaEg5?widt h=1024&height=822&cropmode=none

At the time, this was the only 3.5L ecoboost (transverse version found in the Explorer, Taurus SHO and Flex), so I understand there is some unfamiliarity with the platform. I have 6 questions that I am hoping can be answered:

1) Has there been any installations since this time for this platform and if so, are there any changes or revisions to the wiring I should be aware of since the v1 drawing I was sent?

2) I connected the RED WIRE of the Power Input harness to a switched 12VDC source but not from the ECM as pictured. Will that be an issue?

3) Please clarify what the purpose of the GREEN WIRE HARNESS is for as there shows no wiring for it in the drawing, however, it was provided in the kit I purchased. In “User manual v3.12 s/n:122228 on” it states this is for “DI INPUT and FLOW SENSOR SIGNAL OUTPUT”. I understand familiarity in the platform may be limited, but what would typically be required in an application that requires use of the green harness. It is a DI engine and my injectors are, in fact, peak & hold.

4) I notice in the drawing I am being directed to cut the PWM (-) “bridge” and solder to convert to PWM(+). What is this referring to? Is it the fuel injector signal wire polarity it needs to match? Generally speaking, what would dictate when to cut this and when not to?

5) The MAP sensor wire that we are tapping into…has anyone encountered any signal noise from doing this? I will defer to your expertise on this as you are way more knowledgeable, but I’ve heard from “internet experts (I mean that sarcastically)” that tapping into the MAP sensor signal line, for whatever reason, can sometimes introduce signal noise into the ECM and cause strange things to happen. Just would like an expert opinion on this.

6) As for the FRP wire, just to clarify, that is the Fuel Rail Pressure on the high pressure side after the High Pressure Fuel Pump (again, this engine is Direct Injection) that is being referenced, correct? It can see upwards of 3500psi or even more, in my application.

Thanks in advance. I'll include a bit of meth kit porn for those interested in my system.

https://dm2301files.storage.live.com/y4mE5CcJcX8wSfKF15xLUYsIAAai-xEIkLY14RaiM5i8oQgqJBGLErEoP36VMVXnBnrjK tI5rx64JlrwpBK45q2N1W5j_ebvq0xqlVXqFKRpE m8x0ApzvEHXxSzgipfuRrQEKwjWOWYzGzWK0pFDp 4OJLs_WHfo-UWT1n2vGjhTtSF5JjAyw-KuJapZDEVfCX9U?width=1024&height=505&cropmode=none

https://dm2301files.storage.live.com/y4mJHRU-cctTf1Vl9VYfQaYvyGpCC4bu_0bDhq3VJvLfrEnl soN-mtTW3oQoIBmtiMzbIEiDMUx1AAQV06pulcxMrui8 WAYhRB8O_bfBjitN6N-D88wKS3MaPc0m3b1ZbazzTsijQ-TYcgTVyaWszhsz8vNSrg4DyUt4MdhJ8KveGRqP-syvQ5Q1qUhB4clMloZ?width=1024&height=1024&cropmode=none

https://dm2301files.storage.live.com/y4mA-p8ijfNdsSNT90fTApdUfgrU8G4jZ9i4opk2vt5g1 wLGlcjKqj1Z8qPa_OErQfL9NVu5SNdjYatGD92Yt OG9GeTLGOd6ccBm4qIvhUeXzhylbc4MJ5rajK4H9 vBDVRkxTOiv51w4QFPoJgjC4wCIT9hURCIRuOlp1 ZyqEUWSNb8dcFUNXD5h9iNbmotZ-n8?width=1024&height=498&cropmode=none

https://dm2301files.storage.live.com/y4m2iCVw_-BXVEFCvRhSYUF3DwZ72Mm3JHqG0jI7vaA-_E1bH9YcmnNj50_0oa39Rcm5L-cHVaFaLNpwk2DAq8SD14vMX6MsPeIbN8N2UV3_2l o9gpL5rpJ2DEgBRVomMog5KOfq7aeuASJd1QT5sh u6YPtSMscE2fcOVv4ChKLbP_tqUGxl-upRsyXY6RFn3KP?width=1024&height=1024&cropmode=none

https://dm2301files.storage.live.com/y4mBFxmENbP4Doslr1j4uNdEAAqWY-OG4qg9IN92GoGZo0Q0QX6Z2wP9atdxOjiEtO-Qc3MWcyrBEYdDOQTcPDvL1s8W1Dt_yGVLUTPDZUx CxBSp8uiIV7gFoRHZGmYfWQMFjKdsDACbvJzdAPC O0vC9BkVN5TWBe_otfF7Cb-d1R9phVHeXUmIVYGtQLB9a-0W?width=1024&height=1024&cropmode=none

https://dm2301files.storage.live.com/y4mhq4egETSPpOI71QjFiqYhuSTaW5O9OrqjidHo 7ZsRGG_4ylU9z9zCbWSW9GV6EdneyCgOPDTlJSA1 2f2Mqg8_BrzEYQAWKO9zO1VQVVj6UDphoi_MITzY htlc4h4RG1s36nPN_zwNxgAVsi5uioLTYdbx2ngJ yQM0jTY_G9e6cH_zH_R43ijTbYusCszx_zn?widt h=1024&height=1024&cropmode=none

Anyone interested in checking out the build, I frequent the SHO and Explorer boards and have a build thread. I'm mostly on the SHO boards:

Build Thread (https://shoforum.com/index.php?threads/ecoboost_xsport-consolidated-build-maintenance-thread.142193/)

And I also have an IG for those interested in following:

ecoboost_xsport (https://www.instagram.com/ecoboost_xsport/?hl=en)

diaz1510
05-01-2021, 08:02 PM
Just got clarification from XDI, the supplier of my injectors. I do have peak & hold injectors. This is per Uwe Ostmann at XDI:

"A port injector “peak and Hold Driver” is also not strong enough to drive DI injectors. Those are usually 8A/4A, for DI injectors you need 12A/8A/3A"

Does that mean I need to use the green harness? If so, how is the wiring specifically?