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Discussion Starter · #1 ·
034 1C questions:
How can you tell the difference between a 1A, 1B an 1C? is there any difference on the circuit board?
Also, there is a transistor in the "Q8" position that has it's legs cut off and what looks like a brand or burned hole in it to disable it... what does/did it do??
What is "J7" and the multi jumper "J4" for?? It looks like J2 and 3 are for hall or VR input.
BTW, this is on a "REV[A]" board.

Thanks!
 

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The boards are the same between all the firmware revisions, the only jumpers you need to worry about are the VR/HR setups, and it sounds like you have an ECU with a fried/shorted ignition driver that had the legs cut to prevent a hard short.
 

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Discussion Starter · #3 ·
newt said:
The boards are the same between all the firmware revisions, the only jumpers you need to worry about are the VR/HR setups, and it sounds like you have an ECU with a fried/shorted ignition driver that had the legs cut to prevent a hard short.
So that means I can't drive an ign. coil with this unit? This was done during manufacturing not a mod by an end user...
 

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DDG said:
newt said:
The boards are the same between all the firmware revisions, the only jumpers you need to worry about are the VR/HR setups, and it sounds like you have an ECU with a fried/shorted ignition driver that had the legs cut to prevent a hard short.
So that means I can't drive an ign. coil with this unit? This was done during manufacturing not a mod by an end user...
Why do you think that? Your description fits exactly what a transistor looks like when its over-driven, overheated and shorted. then cut out.
Burnt up and cut out isnt something that would pass QA in manufacturing anything. certainly not at this level of electronics.

QA = Quality Assurance testing
 

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DDG said:
newt said:
The boards are the same between all the firmware revisions, the only jumpers you need to worry about are the VR/HR setups, and it sounds like you have an ECU with a fried/shorted ignition driver that had the legs cut to prevent a hard short.
So that means I can't drive an ign. coil with this unit? This was done during manufacturing not a mod by an end user...
Uhh, no, the transistor would not be burnt up and cut up during manufacture, it's from being driven too hard or an unfused harness/coil short.

The board will either have pristine, new, clean, un-fried drivers, or small resistors in place of them to drive TTL coils.
 

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Discussion Starter · #7 ·
newt said:
DDG said:
newt said:
The boards are the same between all the firmware revisions, the only jumpers you need to worry about are the VR/HR setups, and it sounds like you have an ECU with a fried/shorted ignition driver that had the legs cut to prevent a hard short.
So that means I can't drive an ign. coil with this unit? This was done during manufacturing not a mod by an end user...
Uhh, no, the transistor would not be burnt up and cut up during manufacture, it's from being driven too hard or an unfused harness/coil short.

The board will either have pristine, new, clean, un-fried drivers, or small resistors in place of them to drive TTL coils.
Ok, once I removed the vacuum line I can get a much better view of it.... it looks fried....
There's also a second spot where whatever component was there has been removed and jumpered.
What are my options as far as repairing it?
PS, I've fired it up and it responds, the software does talk to it.


 

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Here is the story of your 1C box.

1) Someone over-dwelled ignition driver 1 and burned it up.
2) They decided to try and to the same to driver channel 2, but probably heard it pop before it went into nuclear meltdown and decided to cut the IGBT leads.
3) They decided to run an external TTL coilpack (and probably cooked that too).

As it stands, Ignition 1 (Q7) is setup for a single external TTL coil in a distributor application.
Q8 could possibly be replaced and it could drive a "dumb" single coil, or jumpered as is Q7 to run a TTL input waste spark 4 cyl coil.

Someone has not been kind to your ECU.
 

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Discussion Starter · #9 ·
TheArchitect said:
Here is the story of your 1C box.

1) Someone over-dwelled ignition driver 1 and burned it up.
2) They decided to try and to the same to driver channel 2, but probably heard it pop before it went into nuclear meltdown and decided to cut the IGBT leads.
3) They decided to run an external TTL coilpack (and probably cooked that too).

As it stands, Ignition 1 (Q7) is setup for a single external TTL coil in a distributor application.
Q8 could possibly be replaced and it could drive a "dumb" single coil, or jumpered as is Q7 to run a TTL input waste spark 4 cyl coil.

Someone has not been kind to your ECU.
Jarrid,
Thanks for the info... yeah...I guess you get what you pay for!!!
I have a complete crank pulley, trigger wheel and pickup, so i can use that along with a 5kt 1 window dist for timing and cam postion?
I have an 034 HO coil already installed, once I repair "Q8" I can drive the coil with that correct??
I also have a new 1C harness.
This ECU will replace the ancient "ECU32" I'm currently running on my 10V 2.6L with E85...
Am I forgetting anything?

PS. I'll need to swap out the 2.5bar Map for 1 bar (I have a spare)
 

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If you "fix" Q8, you MUST rewire the harness to go to the IGN2 driver, as well as to select the IGN2 phase for all ignition events, if not done already.

In the interest of protecting the electronics, I would also remove the jumper on Q7 unless you plan to run an external ignitor TTL coil for.
Accidentally connecting an "dumb" coil to Q7 as it stands will likley damage the ECU as this puts 12v onto a 5v line.

HTH

DDG said:
TheArchitect said:
Here is the story of your 1C box.

1) Someone over-dwelled ignition driver 1 and burned it up.
2) They decided to try and to the same to driver channel 2, but probably heard it pop before it went into nuclear meltdown and decided to cut the IGBT leads.
3) They decided to run an external TTL coilpack (and probably cooked that too).

As it stands, Ignition 1 (Q7) is setup for a single external TTL coil in a distributor application.
Q8 could possibly be replaced and it could drive a "dumb" single coil, or jumpered as is Q7 to run a TTL input waste spark 4 cyl coil.

Someone has not been kind to your ECU.
Jarrid,
Thanks for the info... yeah...I guess you get what you pay for!!!
I have a complete crank pulley, trigger wheel and pickup, so i can use that along with a 5kt 1 window dist for timing and cam postion?
I have an 034 HO coil already installed, once I repair "Q8" I can drive the coil with that correct??
I also have a new 1C harness.
This ECU will replace the ancient "ECU32" I'm currently running on my 10V 2.6L with E85...
Am I forgetting anything?

PS. I'll need to swap out the 2.5bar Map for 1 bar (I have a spare)
 

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TheArchitect said:
Here is the story of your 1C box.

1) Someone over-dwelled ignition driver 1 and burned it up.
2) They decided to try and to the same to driver channel 2, but probably heard it pop before it went into nuclear meltdown and decided to cut the IGBT leads.
3) They decided to run an external TTL coilpack (and probably cooked that too).

As it stands, Ignition 1 (Q7) is setup for a single external TTL coil in a distributor application.
Q8 could possibly be replaced and it could drive a "dumb" single coil, or jumpered as is Q7 to run a TTL input waste spark 4 cyl coil.

Someone has not been kind to your ECU.
This ecu came directly from Nate's old CQ turned Ed's CQ turned aorsinger's CQ. Between Ed and aorsinger, i pulled it from the car and didn't use it, in turn sold it to "DDG."
 

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Discussion Starter · #12 ·
PRA4WX said:
TheArchitect said:
Here is the story of your 1C box.

1) Someone over-dwelled ignition driver 1 and burned it up.
2) They decided to try and to the same to driver channel 2, but probably heard it pop before it went into nuclear meltdown and decided to cut the IGBT leads.
3) They decided to run an external TTL coilpack (and probably cooked that too).

As it stands, Ignition 1 (Q7) is setup for a single external TTL coil in a distributor application.
Q8 could possibly be replaced and it could drive a "dumb" single coil, or jumpered as is Q7 to run a TTL input waste spark 4 cyl coil.

Someone has not been kind to your ECU.
This ecu came directly from Nate's old CQ turned Ed's CQ turned aorsinger's CQ. Between Ed and aorsinger, i pulled it from the car and didn't use it, in turn sold it to "DDG."
Hey,
Thanks for standing tall (coming forward) on this, it ain't no big deal, my main concern is fixing it and hopefully, fixing it myself..... cheaply.
As I'm sure some guys on this forum can relate, I don't have the resources to buy brand new shizz and pay someone to slap it in and tune it.
I have to either buy everything used, pull it from a junkyard, make it myself or barter for it.
I'm in the middle of a "budget" 4000q racecar build (talk about unrealistic!! There's no such thing!).
I'm trying to do all of the above on it.
 

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Well, i don't intend to sell things i've misrepresented, so lets get figured out what i need to do to make sure its right. Another PM incoming.
 

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PRA4WX said:
TheArchitect said:
Here is the story of your 1C box.

1) Someone over-dwelled ignition driver 1 and burned it up.
2) They decided to try and to the same to driver channel 2, but probably heard it pop before it went into nuclear meltdown and decided to cut the IGBT leads.
3) They decided to run an external TTL coilpack (and probably cooked that too).

As it stands, Ignition 1 (Q7) is setup for a single external TTL coil in a distributor application.
Q8 could possibly be replaced and it could drive a "dumb" single coil, or jumpered as is Q7 to run a TTL input waste spark 4 cyl coil.

Someone has not been kind to your ECU.
This ecu came directly from Nate's old CQ turned Ed's CQ turned aorsinger's CQ. Between Ed and aorsinger, i pulled it from the car and didn't use it, in turn sold it to "DDG."
Makes sense now, I told Ed about the state of that hammered and recycled ECU, and it was included with the sale of the car, and driven for many many thousands of miles like that.

The ECU was fully functional if I recall, as long as you were using a TTL style coil on IGN1. The complete lack of pad material means IGN1 will never again have an IGBT driver, don't recall the condition of IGN2's pad.
 

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Discussion Starter · #16 ·
newt said:
PRA4WX said:
TheArchitect said:
Here is the story of your 1C box.

1) Someone over-dwelled ignition driver 1 and burned it up.
2) They decided to try and to the same to driver channel 2, but probably heard it pop before it went into nuclear meltdown and decided to cut the IGBT leads.
3) They decided to run an external TTL coilpack (and probably cooked that too).

As it stands, Ignition 1 (Q7) is setup for a single external TTL coil in a distributor application.
Q8 could possibly be replaced and it could drive a "dumb" single coil, or jumpered as is Q7 to run a TTL input waste spark 4 cyl coil.

Someone has not been kind to your ECU.
This ecu came directly from Nate's old CQ turned Ed's CQ turned aorsinger's CQ. Between Ed and aorsinger, i pulled it from the car and didn't use it, in turn sold it to "DDG."
Makes sense now, I told Ed about the state of that hammered and recycled ECU, and it was included with the sale of the car, and driven for many many thousands of miles like that.

The ECU was fully functional if I recall, as long as you were using a TTL style coil on IGN1. The complete lack of pad material means IGN1 will never again have an IGBT driver, don't recall the condition of IGN2's pad.
Uhhh ohhh....... I think Ed's busted!!! :eek:
Do you guys have the ability to replace IGN2?
Let me know...
From now on this thread should be called "ECU-gate"!!!
 

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newt said:
PRA4WX said:
TheArchitect said:
Here is the story of your 1C box.

1) Someone over-dwelled ignition driver 1 and burned it up.
2) They decided to try and to the same to driver channel 2, but probably heard it pop before it went into nuclear meltdown and decided to cut the IGBT leads.
3) They decided to run an external TTL coilpack (and probably cooked that too).

As it stands, Ignition 1 (Q7) is setup for a single external TTL coil in a distributor application.
Q8 could possibly be replaced and it could drive a "dumb" single coil, or jumpered as is Q7 to run a TTL input waste spark 4 cyl coil.

Someone has not been kind to your ECU.
This ecu came directly from Nate's old CQ turned Ed's CQ turned aorsinger's CQ. Between Ed and aorsinger, i pulled it from the car and didn't use it, in turn sold it to "DDG."
Makes sense now, I told Ed about the state of that hammered and recycled ECU, and it was included with the sale of the car, and driven for many many thousands of miles like that.

The ECU was fully functional if I recall, as long as you were using a TTL style coil on IGN1. The complete lack of pad material means IGN1 will never again have an IGBT driver, don't recall the condition of IGN2's pad.
Okay, so excuse my ignorance here, but this means, functionally the ecu can be setup to work but has the limitation that the IGN1 driver is limited to one service (TTL coil, but not IGBT), but the IGN2 could be used to drive an IGBT coil?
 

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Correct.
 

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DDG said:
Uhhh ohhh....... I think Ed's busted!!! :eek:
Do you guys have the ability to replace IGN2?
Let me know...
From now on this thread should be called "ECU-gate"!!!
Or he simply forgot, since the ECU was in service for years as it is now with no problems....
 

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newt said:
DDG said:
Uhhh ohhh....... I think Ed's busted!!! :eek:
Do you guys have the ability to replace IGN2?
Let me know...
From now on this thread should be called "ECU-gate"!!!
Or he simply forgot, since the ECU was in service for years as it is now with no problems....
I'm sure this is the case. Ed's a good guy i can/will vouch for as well.
 
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