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what does the above mean?

i get, it dont run long enough...............

if it runs cold, why is there a issue with unplugging it and seeing if rpm drops or stalls?

is this beyond your capability?
I think what he is saying is that it only runs for about 15 seconds so he doesnt have enough time to get out to the engine compartment and unplug it before it dies.
 

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Dont be mad that you didn’t specify. Why would it be unreasonable to test it in the condition where it actually has the issue?Aren’t base idle resets done with the engine warm?
Lol... Nobody is asking you to do an idle reset, nobody told you to warm it up before checking the iac. You're arguing with the only person actually trying to help you troubleshoot instead of just doing what is asked of you. Good luck.
 

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Do you have the hose from the valve cover to the throttle body connected?
 

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Does it have a tune? If so do you know who it is tuned by? If the ecu thinks it's getting hot and has a decipha tune (even his free base tune has it) it may be shutting off due to over heat protection. Overheat protection allows the car to run for about 15 seconds before dying again.
 

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I do not believe it has a tune, and no aftermarket chip or anything. That would make sense, but how would this develop suddenly and how would I fix it? Would the ECT be involved in sending a bad signal that the car is too hot?
yes, IF the ect is sending an incorrect signal, the ecu could think its running hotter than it really is. The stock tune doesnt have overheat protection so this would only happen if your car has a chip based on A9L2 which is deciphas base tune. There are a lot of DIY tuners and probably some other shops using it as their starting point. You can tell if it has a chip by pulling the passenger side kick panel and pulling the ecu down. I would think if it has a HCI upgrade it would have a chip but maybe it doesnt. The gauge and the ecu use different sending units so the gauge could read normally but the ecu could think its over heating. I would at least verify if it has a chip.
 

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I just looked, stock computer no chip unless I’m missing something
They are pretty obvious when the computer is pulled out of the bracket. The chip plugs into the J3 port and you can clearly see it. You cant see it unless the computer is pulled down out of the bracket. It will be on the opposite side of the ECU as the connector and stick out of the case slightly. Might have duct tape over it to ensure it doesnt vibrate loose.
 

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It would not have taken that long on a carb application. Welcome to the 21st Century...
It would have taken anyone with any efi experience 30 minutes to diagnose this. Dude has 0 experiences and doesn't seem extremely mechanically inclined, carb wouldn't make any difference.
 

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So do you know what is then?
No but you best believe if my 02s were suspect i would be under the car probing wires, verifying i have power and ground to the sensors and verifying the signal wire had continuity to the ECU from the plug where the o2 plugs in. Not sure if you understand how to do this or of you have the mechanical ability to do so.
 

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As I said a hundred times already, bought a multimeter and I’m going to try to test those. Like Indy said, this stuff requires wiring diagrams, etc to do correctly. I’ve literally never done that before so I have to figure out how to check all of that.

Seems like you think this is just stuff I should “just know how to do.” No *ing * I’ve never done it before so I have to figure that out. Or maybe according to you, no one is allowed to learn how to do this stuff for the first time, they should just know how to do it, right?

No, I don’t understand how to do this, but I’m trying to figure that out, so I don’t know what to tell you, buddy.
It doesn't take a week to probe wires. Good luck fixing it, and in my opinion, your shouldn't be working on cars, you dont even have a basic understanding of how things work or how to do basic troubleshooting. There is a big difference in knowing basics and asking for help and not knowing anything about cars and trying to fix them. Not everyone is mechanically inclined and that is fine. Good luck
 

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Honestly buddy, I don’t owe you an explanation for why I haven’t had a chance to go do those tests yet. My car sits outside and it rains half the ****ing day where I live. I work all day during the week and sometimes at night and on the weekend, too. By the time I'm done working for the day, half the time it's a ****ing monsoon outside. As I already told you, I just bought a multimeter, so I haven't been able to do those tests yet. What are you accusing me of, not having done those tests yet? The TPS I've looked up how to do, and I think I can handle that, but I haven't had time. The 02 sensors, I'm having some trouble with the explanation given in the manual and on other forums, and I asked for clarification. I ran the tests that I have been able to do, but am asking for help on other stuff. I guess I forgot that it's an absolute mortal sin to be a beginner at this hobby, and to ask beginner questions. My bad.



Ah yes, textbook gatekeeping. I’m trying to learn by doing, but here you are running your mouth saying I shouldn’t even be trying to work on my own car because I don’t know how to do something yet. Imagine making a statement like that when someone is asking for help. According to you, I should somehow just know automatically know this stuff, or be banned forever from the hobby. Everyone starts somewhere, but that is apparently a concept that is foreign to you. What a joke. People like you saying **** like that is why the hobby is dying.

As another user so kindly noted, I posted this on another forum, and they are offering real help and being patient with all my beginner questions. Additionally, I have a friend coming to help me do these tests and to teach me the remaining stuff I don’t know how to do yet. Don't you worry, I’ll learn, and I’ll get this diagnosed one way or another. This thread has devolved from being a tech help thread, to something entirely different. I'm finding myself spending more time arguing with internet tough guys than actually working through this issue. I’m tired of having to explain why I want to get the car fixed, why I haven’t had time to run tests, and why I haven't made progress on getting this diagnosed as quickly as some people think I should be. This has gone too far when I find myself typing out an explanation for why I want to get the car fixed because someone is accusing me of "bullshit" over needing a car to drive when my other car is in the shop. I find it absurd that some people would rather spend time poking holes in collateral issues, than explaining how to do a basic test.

It's really a shame. I don't think anyone would disagree that the Mustang community unfortunately doesn't have the best reputation, but as I'm seeing, the scorn is well-deserved. Out of all the cars I've owned and all the people I've dealt with in various car communities, I always seem to find the wannabe hardasses in the Mustang community, even though it's mostly good people. Likewise, in the past when I've gone to car meets and drag strip events, people are overwhelmingly friendly and helpful, but I guess going online brings out the trolls and the ****-talkers.

So at this point, I don't think this thread is productive anymore, and I've grown tired of having to offer justifications for everything. Too many internet badasses and shade tree mechanics.

I just wanted to say thanks to everyone who actually tried to help and thanks to those who were patient with my inexperience. There have definitely been some good helpful tips and advice, and I truly appreciate everyone who has contributed in that regard, as I have been somewhat pointed in the right direction, at least. To those of you who have been patient and helped, I certainly hope I can reach out to you on this forum in the future as I continue to learn and develop basic mechanical knowledge and skills.

If anyone wants to have an adult conversation about what the issue, or if you want to know what it was once I get it fixed, feel free to PM me. Thanks.
Lol... Let us know WHEN YOUR FRIEND diagnoses and fixes it.
 

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Oh no... I've been muted by someone who doesn't know the difference between a screwdriver and a ratchet... I'm gonna go cry now lol
 
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