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I HATE EFI! Please help.

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Old Jul 31, 2022 | 07:26 PM
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Originally Posted by sandymane
My info says it is for the 1990 ford 4.9 with automatic....but it does not specify for a E4OD........
Correct me if I'm wrong, but if you've got a Truck with an E4OD, if you've got the wrong ECM (i.e. One that wasn't intended to be in a truck with an E4OD), the transmission won't work, will it?
 
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Old Jul 31, 2022 | 07:40 PM
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Originally Posted by SFaulken
Correct me if I'm wrong, but if you've got a Truck with an E4OD, if you've got the wrong ECM (i.e. One that wasn't intended to be in a truck with an E4OD), the transmission won't work, will it?
I am not knowledgeable enough to answer that. We need Mark K. to chime in.
 
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Old Jul 31, 2022 | 07:44 PM
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Originally Posted by SFaulken
Correct me if I'm wrong, but if you've got a Truck with an E4OD, if you've got the wrong ECM (i.e. One that wasn't intended to be in a truck with an E4OD), the transmission won't work, will it?
No it won't. FWIW this is more about positively crossing off a potential problem, if we can eliminate possibilities with high certainty(no assumptions made) one at a time we will eventually figure out what is going on.
 
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Old Aug 1, 2022 | 05:17 PM
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Originally Posted by SFaulken
My '87 does not raise the idle speed when put in gear. It is a 4.9 that was originally equipped with a C6, and it has the same computer in it, even though it has an AOD in it now.
Just out of curiosity, what does your truck idle at in P? in D?
 
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Old Aug 1, 2022 | 05:23 PM
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Originally Posted by SFaulken
Correct me if I'm wrong, but if you've got a Truck with an E4OD, if you've got the wrong ECM (i.e. One that wasn't intended to be in a truck with an E4OD), the transmission won't work, will it?
That is correct. The E4OD is a fully electronic transmission. You must have a compatible ECM.
 
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Old Aug 1, 2022 | 05:46 PM
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Originally Posted by Conanski
Is the "Calibration Decal" still present on the drivers door pillar? If so post it up please.
For what it's worth, according to the VIN, a 4.9L, E4OD, & 8.8 with 3.08 gears non-locking is all correct.

Here's the calibration decal:








 
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Old Aug 1, 2022 | 05:54 PM
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Originally Posted by David K
Just out of curiosity, what does your truck idle at in P? in D?
In park, once it comes off High Idle, it's about 750-800, when I drop it down into gear, it drops to 550-600
 
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Old Aug 1, 2022 | 06:04 PM
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Originally Posted by SFaulken
In park, once it comes off High Idle, it's about 750-800, when I drop it down into gear, it drops to 550-600
Sounds perfect. Wish mine did that.
 
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Old Aug 1, 2022 | 07:38 PM
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From: Easton,Ks
He has the right PCM computer from the calibration number.
 
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Old Aug 2, 2022 | 04:06 PM
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Originally Posted by subford
He has the right PCM computer from the calibration number.
Lets deep dive and find his strategy so we can find out quirks and features lol
 
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Old Aug 2, 2022 | 04:49 PM
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Originally Posted by SFaulken
In park, once it comes off High Idle, it's about 750-800, when I drop it down into gear, it drops to 550-600
Excessive base timing will cause a large rpm drop when going from neutral to drive. I call it 'torqueless rpm'.
 
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Old Aug 2, 2022 | 05:12 PM
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Originally Posted by Prototypemech
Excessive base timing will cause a large rpm drop when going from neutral to drive. I call it 'torqueless rpm'.
Spout connector, 10 deg, etc. All by the book.

Greatly appreciate the help you guys are giving. Hope somebody figures it out.
 
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Old Aug 2, 2022 | 05:18 PM
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Originally Posted by Prototypemech
Excessive base timing will cause a large rpm drop when going from neutral to drive. I call it 'torqueless rpm'.
Uh, ok? I don't consider a 200 rpm drop on a mechanical automatic transmission to be excessive drop.
 
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Old Aug 2, 2022 | 07:44 PM
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did you check your fuel pressure and volume in gear and out of gear?
 
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Old Aug 2, 2022 | 08:27 PM
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No one needs to know this but I actually have a 96 with a 2 wire spout. a wire to the shorting bar disintegrated. I never got a code before, but it would have been barely making that circuit . I have a e4od so it will prob pep up>
 
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