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Ford 5.0 ECU testing


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Ripsawhammer
Novice

Aug 17, 2019, 3:15 PM

Post #1 of 18 (212 views)
  post locked   Ford 5.0 ECU testing  

 My number seven and eight injectors showed no pulse. I removed the EC you took my test light to the ground ,number 60 and probe the eight injector pins, six of which lit but seven and eight did not. Does this mean by ECUs bad?


Hammer Time
Ultimate Carjunky / Moderator
Hammer Time profile image

Aug 17, 2019, 4:49 PM

Post #2 of 18 (210 views)
  post locked   Re: Ford 5.0 ECU testing  

I hope you know that is the fastest way to destroy a PCM.

Those final drivers cannot handle the current of an incandescent bulb.

Sounds like your drivers are already burned out.



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We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.



Tom Greenleaf
Ultimate Carjunky / Moderator
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Aug 18, 2019, 2:55 AM

Post #3 of 18 (189 views)
  post locked   Re: Ford 5.0 ECU testing  

True on testing with "incandescent" test lights - just get an LED one.
What is this thing? I ask that B/C they use this block/engine in a wild assortment of vehicles,
T



Tom Greenleaf
Ultimate Carjunky / Moderator
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Aug 18, 2019, 2:58 AM

Post #4 of 18 (189 views)
  post locked   Re: Ford 5.0 ECU testing  

 



Ripsawhammer
Novice

Aug 18, 2019, 10:55 AM

Post #5 of 18 (177 views)
  post locked   Re: Ford 5.0 ECU testing  

 This one is in a 62 falcon. Didn’t know that about the incandescent bulbs. But can’t find any information on how to check to see what’s wrong with this thing. Picked up a second ECU and it does the same thing. Is there something else here that shutting those off or something I don’t get it.


Tom Greenleaf
Ultimate Carjunky / Moderator
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Aug 18, 2019, 11:16 AM

Post #6 of 18 (171 views)
  post locked   Re: Ford 5.0 ECU testing  

INCANDESCENT bulbs: They have a micro hair of spiral wire that gets so hot it glows vs LED. They use power and want spot on voltage or go dimmer to brighter then too much voltage blows the bulbs easily.


Good for seeing a load vs LED and no other meters have a clue but could take down a battery overnight if left on - small draw but a real draw - that's why NOT to use it for high tech anything but useful for others and should want both.


This block was put in the unit body floor pattern of a '62 Falcon, I think 1st was a 221 C.I.D. V8 or low displacement of about same block!


Trivia without looking it up! Sorry,


Tom



Ripsawhammer
Novice

Aug 18, 2019, 1:43 PM

Post #7 of 18 (163 views)
  post locked   Re: Ford 5.0 ECU testing  

 Thanks for the info on the testers Tom, I’ll remember that. Sorry for a lack of information on what I’m trying to do. The car is a 62 Ford falcon. Toner motor 5.0 V8 from what I believe was a 87 or 88 Ford Thunderbird. Cylinder seven and eight not firing. Compression check is 153 to 155 all eight cylinders. Spark good on all eight cylinders. No injector pulse, negative side, on seven and eight injectors. Traced wires from ECU to injectors they are all good. Tried a second ECU , condition unknown . Same result no pulse to seven and eight. Not sure what to do next. Is there somewhere out there that I can get at ECU checked ?


Tom Greenleaf
Ultimate Carjunky / Moderator
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Aug 18, 2019, 3:11 PM

Post #8 of 18 (155 views)
  post locked   Re: Ford 5.0 ECU testing  

OK: Just one question and let me thing real hard as I may have TWO OE originals, not a wire touched but Town Cars. Both pick up air on the driver's side I plead not sure on T-Bird a wild option might have done it "asymmetrically" opposite would be the "HO" motor TMK twist is it spun backwards I think. Yes, that means dist. rotor would be opposite turning also - a mirror image engine.
Not sure why for cars/truck all did those years. The end all reason is for also being able to make twin engine MARINE engine wont work if props are the same!
Don't ask I got into too much trouble for decades with all that crap.


Let me think where to check but thinking the OE set up for relays and if they could be at fault??
Tom



Hammer Time
Ultimate Carjunky / Moderator
Hammer Time profile image

Aug 18, 2019, 3:24 PM

Post #9 of 18 (150 views)
  post locked   Re: Ford 5.0 ECU testing  

One single relay powers all the injectors.

Has this setup ever run right?



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We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.



Ripsawhammer
Novice

Aug 18, 2019, 5:08 PM

Post #10 of 18 (139 views)
  post locked   Re: Ford 5.0 ECU testing  

 I bought this 62 falcon with this fuel injected V8 already installed in it. Had it in the shop for other work done .they told me two cylinders were down. Did the diagnosing and found out I’m not getting the pulse to number seven and number eight injectors. Sorry, I guess the answer to your question is no. I don’t believe it ever run correctly as long as I’ve owned it.


Hammer Time
Ultimate Carjunky / Moderator
Hammer Time profile image

Aug 18, 2019, 5:16 PM

Post #11 of 18 (137 views)
  post locked   Re: Ford 5.0 ECU testing  

I'm starting to wonder if they put a 6 cylinder ECU in it.



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We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.



Tom Greenleaf
Ultimate Carjunky / Moderator
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Aug 18, 2019, 7:26 PM

Post #12 of 18 (121 views)
  post locked   Re: Ford 5.0 ECU testing  

Oh my! Unsure. Upper manifold says 5.0 right on it a trapezoid plate with torx screws. If not what is there? Dist. cap up front, slightly towards driver's side uses spark plug like tips - count them if this lost it's isn't for you,


Tom



Ripsawhammer
Novice

Aug 18, 2019, 9:03 PM

Post #13 of 18 (116 views)
  post locked   Re: Ford 5.0 ECU testing  

ECU part no.is E1X. F1MF 12A650 GA. .is that for a six or eight?


Hammer Time
Ultimate Carjunky / Moderator
Hammer Time profile image

Aug 19, 2019, 4:40 AM

Post #14 of 18 (106 views)
  post locked   Re: Ford 5.0 ECU testing  

There is no way for us to know that. There is also no way for us to know if you are testing it properly or if you are even on the right wires.

Yes, if there is no pulse signal coming out of the ECU it would indicate a bad ECU but who knows if you are testing it properly. Using a test light is definitely NOT the way to do this. Using a lab scope or noid light with the wiring disconnected would be the correct way.
You would also have to test the wiring for shorts and opens.



~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.



Ripsawhammer
Novice

Aug 19, 2019, 5:02 PM

Post #15 of 18 (93 views)
  post locked   Re: Ford 5.0 ECU testing  

 And then there’s this. The second ECU I just bought , With matching numbers to the one that came with the car, has 91 Thunderbird written on it and yellow paint pen. 91 Thunderbirds did not have a V-8 option. So like you said I’m starting to believe I have an EC you for a V-6.


Sidom
Veteran / Moderator
Sidom profile image

Aug 20, 2019, 3:43 PM

Post #16 of 18 (73 views)
  post locked   Re: Ford 5.0 ECU testing  

I won't muddy the waters here too much but will just toss this out.

You need to find out if you have port or sequential fuel injection.
Sequential injection fires individual cylinders while port fuel injection fires whole banks.
So if it's port, then you probably just have a wiring problem.

A quick check is to look at control wires going to the comp, If there are just 2 different colors then it's port, if there are 8 different colors then it's sequential.


Ripsawhammer
Novice

Aug 24, 2019, 3:35 PM

Post #17 of 18 (40 views)
  post locked   Re: Ford 5.0 ECU testing  

 Thank you all very much for the input. I have installed an A9L computer for a fox body Mustang in this car. Now it runs fantastic. Hammertime thank you very much for the thought of a V-6 or computer. Got me over the hump. Problem solved


Hammer Time
Ultimate Carjunky / Moderator
Hammer Time profile image

Aug 24, 2019, 3:38 PM

Post #18 of 18 (36 views)
  post locked   Re: Ford 5.0 ECU testing  

Well, that's one for the record books. Glad you got it resolved.

Closing this now as solved.



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We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.







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