I recently bought a 2010 SHO not running. The guy paid his “friend the mechanic” to R&R the turbos because he had just purchased the car with blown turbos. It ran fine prior to the turbos being replaced. After the turbos were swapped the car has been a crank no start and his buddy couldn’t figure it out after 4 months and gave up. I’ve been digging into this car for a while. No codes and no codes are stored. Has fuel pressure, ckp cmp signals/synced. It’s getting no spark. I can’t seem to find much for diagrams online. I did guess on the pcm and I sent it out to get fixed and I just found out the pcm checks out fine. Back to the beginning now. I was hoping to find a diagram of all the grounds on the motor, specifically where the pcm grounds are sent through the body back to the battery. This vehicle has me stumped. I had my ford guy bring his dealership scanner out and found nothing either so we will be going deeper into the car this week. Any ideas are greatly appreciated. Also will need to put a scope on the ckp and verify proper signals. Thanks!
Crank no start ♂️
- Thread starter Randyo08
- Start date
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luigisho
SHO Member
2011 FORD TAURUS Electrical Wiring Diagrams Shop Service Manual EWD OEM 2011 | eBay
2011 FACTORY Ford Taurus Wiring Diagrams Manual.
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SHOrod
Torrie Tuned
I'm glad to hear you figured it out but am curious as to a couple of things. Did you ground a spark plug and confirm you have great spark, or was there a connector plug that was missing a ground? And is that cylinder compression that you measured at 30psi average per cylinder (really low!) or there was only a 30 psi average delta across all cylinders?
-Rod
-Rod
luigisho
SHO Member
bad spark plug or ground strap?
Someone had replaced the ground strap with some tiny wire I changed that to some thick cable I had laying around the shop. And yes average psi is 30 across the board I ordered a borescope to see if the valves hit the pistons….
Ta2dResqr
SHO Member
30 across the board?! I would expect around 160-170, maybe higher depending on wear and build-up. Time to decide if you want to rebuild or replace a motor. Sounds like you got scammed. No way that thing ran and they "just" changed the turbos. I am not even sure how you would get 30. I could see 30 on some and nothing on the others if the chain was busted. If you really want to diagnose further, I would try a leak-down tester. That will at least tell you where all your compression is going. Car-Part has motors starting at $1200 minus turbos since yours were just replaced.
luigisho
SHO Member
30? ouch. THis thing sounds like a mangled mess. Who replaces a ground strap with thin wire? I wish you luck. Keep checking in.
My guess is the timing jumped when it was last shut off. Horrible timing for him unfortunately because he did pay to have brand new turbos put on. The old ones were in the trunk and they were smoked…..I did get the car cheap enough knowing that if it needed a motor it was still worth it. 104k on the clock
luigisho
SHO Member
If it's worth it even with a motor swap then congrats. 104 isn't that high for a 12 year old car. My question is still why did the ground strap get changed? Was the engine out already?
I have no idea
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