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  • 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk-

Need replacement ECU

  • Thread starter Thread starter Scrapla347
  • Start date Start date Oct 14, 2020
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HemiRick

I'd be looking at jacking under the house
Jun 28, 2020
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272
73
Memphis TN
Oct 21, 2020
#41
  • Oct 21, 2020
  • #41
I have an ECU from my 91 that I've replaced caps in, but did not fix it....Anyone have any idea if there's a person/company that will look at it/want it for core, worst case? Your ECU I'd say is beyond repair w all that corrosion.
 

Mustang5L5

That is…until I whipped out my Bissell
Mod Dude
Feb 18, 2001
43,176
17,878
224
Massachusetts
Oct 21, 2020
#42
  • Oct 21, 2020
  • #42
Internal power supply (for the 5v) is another weak part of the ECU. If the caps blow, they can’t protect it from surges and it can fry.

also don’t overlook a burned PIN 46 trace which is quite common as well.
 
Last edited: Oct 21, 2020

Mustang5L5

That is…until I whipped out my Bissell
Mod Dude
Feb 18, 2001
43,176
17,878
224
Massachusetts
Oct 22, 2020
#43
  • Oct 22, 2020
  • #43
Voltage regulator is what I meant to say.

Left pin is input (12V) center is ground and the right pin should be 5V output. I haven't peeked inside an A9L in a while but from this stolen pic it looks like there may be 4 of them. Would need to see the writing on them to pull specs.

 

Vinnyc1487

Active Member
Jul 14, 2020
106
61
38
Chicago
Oct 22, 2020
#44
  • Oct 22, 2020
  • #44
https://www.corral.net/threads/for-sale-a9l.2506844/



QUOTE="Scrapla347, post: 9268659, member: 232877"]
Yea I heard they are easy to use but I wanted to reuse my chip I saved.
[/QUOTE]
 
Reactions: Scrapla347

Blown88GT

Founding Member
Nov 13, 1999
2,282
523
164
Palm Beach Gardens, FL
Oct 22, 2020
#45
  • Oct 22, 2020
  • #45
$250 for an A9L. Probably should sell mine which is only a spare if the MS ever goes out.
 

Scrapla347

Active Member
Apr 23, 2020
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Florida
Oct 24, 2020
#46
  • Oct 24, 2020
  • #46
Noobz347 said:
Is that Diablo's 4-bank chip?


And yeah... That is [the] worst ECU I have ever seen in all my years.


Put a Stangnet sticker on it and frame it! LoL

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Where can I order a Stangnet sticker???? I wanna get one for my Fox!!! Instructions from @Noobz347 : Ok, so I just got word from the boss... This is how he's going to handle Stangnet sticker requests: Send an email to help@stangnet.com with - Name, Address, and sticker color (black or...
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Click to expand...
I'm not sure what chip but I do know I went to Diablo Motorsports and the tuner was Scott Beers. Very cool guy very heavy Canadian accent. I was a last minute customer and showed up without a blank chip luckily he had this one and spent about a hour on my car before it started getting outta my price range. He couldn't get my ECU back easily and didn't want to break any wires so we left it on the floor board and I never fixed it. My car sat for years cause I made some dumb mistakes and when I finally got back to it the ECU looked like a coral reef. I think I'm going to just get the Micro Squirt and try to use the auto tune feature. I also heard the Micro Squirt can tune with an AFR gauge and i can ditch my mass air.
 

Scrapla347

Active Member
Apr 23, 2020
200
67
38
Florida
Oct 24, 2020
#47
  • Oct 24, 2020
  • #47
I found this on Ebay but for that money I rather upgrade with a Micro Squirt and a AFR gauge http://rover.ebay.com/rover/1/711-5...0001&campid=5335821607&icep_item=281019082061
 

Scrapla347

Active Member
Apr 23, 2020
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Oct 26, 2020
#48
  • Oct 26, 2020
  • #48
https://www.summitracing.com/parts/aaz-78-4352
 

Scrapla347

Active Member
Apr 23, 2020
200
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38
Florida
Oct 26, 2020
#49
  • Oct 26, 2020
  • #49
Scrapla347 said:
I'm not sure what chip but I do know I went to Diablo Motorsports and the tuner was Scott Beers. Very cool guy very heavy Canadian accent. I was a last minute customer and showed up without a blank chip luckily he had this one and spent about a hour on my car before it started getting outta my price range. He couldn't get my ECU back easily and didn't want to break any wires so we left it on the floor board and I never fixed it. My car sat for years cause I made some dumb mistakes and when I finally got back to it the ECU looked like a coral reef. I think I'm going to just get the Micro Squirt and try to use the auto tune feature. I also heard the Micro Squirt can tune with an AFR gauge and i can ditch my mass air.
Click to expand...
 

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stanglx2002

CT Material here
15 Year Member
Jul 7, 2005
1,563
1,110
164
Oct 26, 2020
#50
  • Oct 26, 2020
  • #50
reading through the comments on this one item I noticed wasn't brought up which is the fact the Diablo chip has to be plugged into J3 Port. This port is notorious for giving issues as well with connectivity to the chip. I used to run a Moates Chip years ago before going Megasquirt chasing my tail with issues of the car just to come find out it was the chip. So even if you do get a good ECU this still may become an issue.

If you go with a standalone unit you have a lot more additional features and upgrade options that are feasible that you didn't have with the factory parts.
 
Reactions: Scrapla347 and Noobz347

Noobz347

Stangnet Facilities Maint Tech... Er... Janitor
Admin Dude
Jan 4, 1985
42,928
21,103
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Box behind Walmart
Oct 26, 2020
#51
  • Oct 26, 2020
  • #51
stanglx2002 said:
reading through the comments on this one item I noticed wasn't brought up which is the fact the Diablo chip has to be plugged into J3 Port. This port is notorious for giving issues as well with connectivity to the chip. I used to run a Moates Chip years ago before going Megasquirt chasing my tail with issues of the car just to come find out it was the chip. So even if you do get a good ECU this still may become an issue.

If you go with a standalone unit you have a lot more additional features and upgrade options that are feasible that you didn't have with the factory parts.
Click to expand...

I use Deoxit contact cleaners and protectants. I still run a Diablo 4-bank chip and A9L in my 86. I had the issues you're speaking of until I started using this. I also run a strip of Gorilla tape over the chip once it's in place. Not to "squish" it in but just to keep it from vibrating or moving.

I use the same stuff on the EEC connector.
 
Reactions: Scrapla347

HemiRick

I'd be looking at jacking under the house
Jun 28, 2020
723
272
73
Memphis TN
Oct 26, 2020
#52
  • Oct 26, 2020
  • #52
Deoxit is great stuff, makes cantankerous window switches work much better too.
 

Black1987

my wife Bedazzled my input shaft
15 Year Member
Jan 9, 2011
1,064
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NC
Oct 27, 2020
#53
  • Oct 27, 2020
  • #53
Is there any major difference from the A3M to A9L?

I ran both of these in my 1993 I sold, but kept these as spares for the current 1993
 

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Mustang5L5

That is…until I whipped out my Bissell
Mod Dude
Feb 18, 2001
43,176
17,878
224
Massachusetts
Oct 28, 2020
#54
  • Oct 28, 2020
  • #54
Black1987 said:
Is there any major difference from the A3M to A9L?

I ran both of these in my 1993 I sold, but kept these as spares for the current 1993
Click to expand...

5 degree temp difference in A/C max engage. (247 vs 242) but that’s about it. Some minor hardware changes. I believe the A3M has a better internal heat sink.

consider them equal
 
Reactions: General karthief

Scrapla347

Active Member
Apr 23, 2020
200
67
38
Florida
Nov 12, 2020
#55
  • Nov 12, 2020
  • #55
stanglx2002 said:
reading through the comments on this one item I noticed wasn't brought up which is the fact the Diablo chip has to be plugged into J3 Port. This port is notorious for giving issues as well with connectivity to the chip. I used to run a Moates Chip years ago before going Megasquirt chasing my tail with issues of the car just to come find out it was the chip. So even if you do get a good ECU this still may become an issue.

If you go with a standalone unit you have a lot more additional features and upgrade options that are feasible that you didn't have with the factory parts.
Click to expand...
Yea this car sat for years and was running perfect before parked. I have a new gas tank and planned on getting it started and chasing down all the leaks until I noticed the ECU was toast. I have been overthinking this day and night rather to go stock ECU and hope my chip is still good or just get the Micro Squirt to get it running then use the auto tune feature to tune it. I was told I can lose my MASS AIR sensor if I go with the Squirt and just run an A/F gauge to tune with.
 

Scrapla347

Active Member
Apr 23, 2020
200
67
38
Florida
Nov 12, 2020
#56
  • Nov 12, 2020
  • #56

MicroSquirt® for 1986-93 Ford 5.0 Mustang – EFI Source

EFI Source supplies Goldbox, MegaSquirt, MicroSquirt, LS, Hemi, Harness, and other programmable EFI systems and products o the performance minded automotive community.
www.efisource.com
 
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