Ford code 45?

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At this point I'll give it a shot. Part of me says chuck in the towel, another says stick with it a little more.

I mentioned ^^ that stray red vacuum line. I spent a long time trying to see where it might have come from, and came up blank. I think it was left-over from the assembly line? I must have used half a can of Carb cleaner looking for vacuum leaks, found nothing!

I guess I'm another guy that is guilty of thinking when the TFI mod died so did the car. I didn't know they could cause other problems. Ford paid out a lot of money for that problem in class action suits.

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Like I said it isn't common but it does happen where it gounds out internally due to a fault based on temperature and causes issues not just with timing but also fuel timing because the computer is getting it's "corrupted" info from this module.

You are so close, don't give up now...
 
That TFI module requires a special socket to get it out. I forget the size but the socket itself is tapered. I love Ford, but it is the dumbest thing ever. We had to turn a socket on the lathe to get the stinking thing to fit into the TFI. Now I will have to look high and low in the tool box to see if I still have it in case mine goes. I replaced it in case of failure. Now you got me thinking!
 
Originally Posted By: brianl703
I had this "thermactor air stuck upstream" code on my 88 Mustang GT and it turned out to be the thermactor air diverter solenoid.


Yup, very common one.

I really have a hard time picturing this being the TFI.

One of the common issues on the Mustang was that the "Salt and Pepper Shakers" as we called them, get corrosion on the pins that connect them together. These two connectors connect the vast majority of the sensors, as well as all the injectors to the ECM. Taking them apart and making sure they are clean is another step.

It has to be something stupid if this all precipitated when the TPS went bad, and YES, it could be a bad ECM, especially if you are unable to get codes out of it any longer.

They are cheap from the wreckers, if you were closer, I'd give you one, as I have a few kicking around.
 
I had to replace the ECM in my 1991 Mustang GT years ago when it would not hold any memory anymore. Was only $50.00 for one out of a boneyard.
 
I wonder if it pays to search the junk yards for an ECM? Does the ECM for an AT work with an MT or are they different. You've gone this far it might be worth looking into.
 
Burnt another half day and got nowhere. Disconnected vacuum to the air pump it did nothing. Disconnected and blocked off air and electric to the module on the EGR it did nothing. Swapped the TFI, and checked timing, timing was good, TFI replacement did nothing.

Only things left are ACT ECT but they're fairly new, and the 02 sensor which might have 20,000 miles on it. Once this beast warms up its strong. The only other thing I can think of it the ECM, and a Junkyard might be a good place to look.

I've had it for today, will do some more reading and searching. Demarpaint, thanks for asking on the Ford forum, and thanks to everyone else who has helped here. Keep the info coming!

The only thing sticking in my mind now is the Scan tool light blinking only 3 times when we had the engine running, and how [censored] it runs when its cold!

As a side note each time I disconnected, changed or, tried something I disconnected the battery for 20 minutes.

AD
 
What about the coolant temperature sensor? Just a stupid thought...

Also where is the ECM located in this vehicle? Could try heating it with a hair dryer and starting the van cold and see if makes the problem go away... ?!?

Don't give up you are close...
 
I haven't looked for the ECM yet, but my feeling is it is on the passenger side thru the firewall. What sucks is I'm guessing now since the stinking Scan Tool let me down.

Any idea why that light would blink 3 times when the engine was running? Then nothing else until you shut it off and restarted, then 3 blinks again? $325 for a ECM is not something I'd want to guess at if it were my cash!

We could try a junkyard but I don't know if the fact that this truck has a stick matters with the ECM. I'm betting the yard is loaded with them from AT F-150's.

On the Ford board Demarpaint posted my findings, and as it turns out the 11 11 12 11 is 11 11 1 11 11, meaning there is no codes in the ECM, green light everything is fine. So much for that, if you listened to this thing when it was cold you'd think it was on its last legs!

I guess I'm in a foul mood and I hate tossing in the towel!

Stevie the Coolant temp sensor and ACT sensor are fairly new. Not saying they aren't defective, my buddy doesn't have spares of them so I didn't change them, trying to save cash and not guess at the wrong part again.

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Originally Posted By: Jason2007
You can use an automatic ECM without a problem.


Good to know, thanks!

AD
 
Its on the drivers side, through the firewall, about half-way down. Bolts through from the harness from the engine-side, bolt is 10mm IIRC. ECM is INSIDE the vehicle.

There are some simple resistance tests you can perform on the ACT and ECT, google the values.
 
Well I'm up in the middle of the night thinking about this 88 F-150 I married. Anyway I'm going to have my friend search junkyards for an ECM. Will the ECM from an E-150 same year fit into and work properly in an F-150. I would think and hope it does and if so the odds of getting one would be increased somewhat.

Again thanks!
AD
 
The calibration tag is also on the ECM. Get a new ECM w/same code and you are good to go. But, if you get one from an auto tranny truck it will not be the same. Aslong as the engine is the 4.9 I6 you are good to go.
 
I called someone I know in NY that has a big junk yard. He said that I need the numbers off the ECM. That means pulling the thing out. Are these numbers that are on the ECM on the door jam? I'm not looking for extra work pulling the ECM out, looking for numbers if I can avoid it.

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