200,000 mile GT build

[Akurma]

For giggles I did a few things today. No luck, I am going to call Ford Performance tomorrow and see what they say. I suspect it may be a tune, ecu or harness issue. It is totally possible that wired something up incorrectly

- Compression tested it today. It was done cold obviously. Cylinder 3 is a little "low" but still in good standing from what I can find online? Certainly not enough to make it not run.

Cylinder 1 - 215psi Cylinder 5 - 230psi
Cylinder 2 - 210psi Cylinder 6 - 235psi
Cylinder 3 - 190psi Cylinder 7 - 215psi
Cylinder 4 - 205psi Cylinder 8 - 220psi

- Moved the grounds for the Lethal Performance fuel pump, both of the ground wires now have their own dedicated ground, no change.
- I went through every connection on the engine harness to verify it is receiving power, they all are.
- The only oddity I notice was when I unplug a driver side cam sensor I can hear a relay click from the coyote fuse block? Unplugging a passenger side does not do it? I think its unrelated but weird.
- Plugged SCT X4 in and realized It allows me to do a crank relearn. I did not do this as it only lets me select "Ford Gas 08+" for the vehicle. I want to update the X4 and see if it allows me to select Gen 3 coyote.

 

[Akurma]

Are you tuned for the imrc delete? And did you buy the gen 3 heads new? Just spitballing.

I am not tuned at all, stock tune from the control pack. I have not seen anything stating I need to be tuned for the IMRC lockouts? i'll research this. I deleted them because they wont fit once the engine is in the car. Heads were reman units from Summit. I know there are differences in f150 & Mustang cams, but I verified the cam part # and they match mustangs

 

[07GtS197]

I’m wondering if it’s a bad ecu. I don’t see why it should click like that. Sounds like there is voltage where it doesn’t belong.

 

[Akurma]

Called Ford Performance, the guy I got was very helpful and gave me a few things to check and try later this week. The one that intrigued me the most was to bypass the ecu by using a temporary remote starter trigger. If it runs that way then it narrows it down to ignition wiring or the ECU itself. He also mentioned that he has seen, and i've seen this on other forums that the first start for a gen 3 can take a long crank time. He suggests 45-50 seconds of continuous cranking for the ECU to learn all the parameters. After that first time it'll start over in a few cranks.

 

[07GtS197]

Progress is being made. I hope it’s something simple that can be rectified easily.

 

[Akurma]

No luck with Ford Performances suggestions. Does the same thing, cranks and stumbles but doesn't run. Not even when sprayed with some starting fluid. which leads me to believe there's no spark, but I tested all 8 plugs and coils and have spark? They suggested wiring the fuel pump power completely separate from the car. I don't see how that would change anything as I know the pumps are kicking on and supplying fuel to the regulator and rails.

I am at a total loss here i dont get it. What diag software is everyone using to datalog coyote swaps? Will my SCT X4 datalog still work? I assume ill have to unmarry it from my 2v ECU

 

[07GtS197]

I’m pretty sure you can datalog with an x4 without unmarrying it.