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Re: ECU reset

 

Just turn on the?dome light and disconnect one battery wire.? The?dome light bulb will??discharge the caps just fine.??

On Mon, Feb 6, 2023 at 7:59 PM RICHARD KOERNER <rjkinpb@...> wrote:
Shoot...now you guys are making me all nervous!? OK Richard.....settle down....rethink.? First, remove Negative Ground from Battery; heck that can do no harm.? Second...a jumper wire from Positive to Ground Wire; I mean, as powerful as that battery is, once you remove cable to Negative, it's just nothing.? Third....I guess there is no third.? Sitting overnight, all electricity in ECU will be completely drained and back to Factory.? Then reconnect all back together.? And like I said....it will take numerous start/drive/shutdown events for ECU to relearn current situation with all sensors; that poor thing is processing a bunch of information, and much of it comes from dirty sensors.? The Subie Engineers only allowed for incremental adjustments in the "Brain"....so the process is somewhat slow.....they didn't want you to screw stuff up too much.

On Monday, February 6, 2023 at 06:35:42 PM PST, SEAN GARRETT via <doit.outdoors=[email protected]> wrote:


I didn¡¯t follow the procedure as described, i had that exact thought to. I youtube the procedure and used that instead.


On Feb 6, 2023, at 6:13 PM, RICHARD KOERNER <rjkinpb@...> wrote:

?
No.? It is simple and straightforward.? Like I said, remove Negative from battery.? Hook up jumper from Positive to removed ground wire at Negative like I spoke of.? Electricity will effortlessly drain out of capacitors in ECU; I spoke of overnight, and this is probably not necessary, heck just go buy a pizza or something; but in my experience your really want old memory to be totally deleted.? The ECU's mind will now be back to factory settings. But really....keep the Red Wire on Positive Terminal.? Disconnect the Black Wire on Negative Terminal, typically a 10 mm wrench.? Little wire from Positive to removed Ground; it probably only takes a few seconds.....but, what the heck, capacitors are a little mysterious.....so draining them overnight is not a bad idea.



--
Eric Freudenthal Ph.D. (he/his/him/himself)
Spouse, dad, friend <eric@...>
Associate Professor of Computer Science, UTEP <efreudenthal@...>
Founder & Manager, Freudensong, LLC <eric.freudenthal@...>
It is now no more that toleration is spoken of as if it were the indulgence of one class of people that another enjoyed the exercise of their inherent natural rights, for, happily, the Government of the United States, which gives to bigotry no sanction, to persecution no assistance, requires only that they who live under its protection should demean themselves as good citizens in giving it on all occasions their effectual support.? George Washington, 1790
Re: ECU reset

 

Shoot...now you guys are making me all nervous!? OK Richard.....settle down....rethink.? First, remove Negative Ground from Battery; heck that can do no harm.? Second...a jumper wire from Positive to Ground Wire; I mean, as powerful as that battery is, once you remove cable to Negative, it's just nothing.? Third....I guess there is no third.? Sitting overnight, all electricity in ECU will be completely drained and back to Factory.? Then reconnect all back together.? And like I said....it will take numerous start/drive/shutdown events for ECU to relearn current situation with all sensors; that poor thing is processing a bunch of information, and much of it comes from dirty sensors.? The Subie Engineers only allowed for incremental adjustments in the "Brain"....so the process is somewhat slow.....they didn't want you to screw stuff up too much.

On Monday, February 6, 2023 at 06:35:42 PM PST, SEAN GARRETT via groups.io <doit.outdoors@...> wrote:


I didn¡¯t follow the procedure as described, i had that exact thought to. I youtube the procedure and used that instead.


On Feb 6, 2023, at 6:13 PM, RICHARD KOERNER <rjkinpb@...> wrote:

?
No.? It is simple and straightforward.? Like I said, remove Negative from battery.? Hook up jumper from Positive to removed ground wire at Negative like I spoke of.? Electricity will effortlessly drain out of capacitors in ECU; I spoke of overnight, and this is probably not necessary, heck just go buy a pizza or something; but in my experience your really want old memory to be totally deleted.? The ECU's mind will now be back to factory settings. But really....keep the Red Wire on Positive Terminal.? Disconnect the Black Wire on Negative Terminal, typically a 10 mm wrench.? Little wire from Positive to removed Ground; it probably only takes a few seconds.....but, what the heck, capacitors are a little mysterious.....so draining them overnight is not a bad idea.


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Re: ECU reset

 

¿ªÔÆÌåÓý

I didn¡¯t follow the procedure as described, i had that exact thought to. I youtube the procedure and used that instead.


On Feb 6, 2023, at 6:13 PM, RICHARD KOERNER <rjkinpb@...> wrote:

?
No.? It is simple and straightforward.? Like I said, remove Negative from battery.? Hook up jumper from Positive to removed ground wire at Negative like I spoke of.? Electricity will effortlessly drain out of capacitors in ECU; I spoke of overnight, and this is probably not necessary, heck just go buy a pizza or something; but in my experience your really want old memory to be totally deleted.? The ECU's mind will now be back to factory settings. But really....keep the Red Wire on Positive Terminal.? Disconnect the Black Wire on Negative Terminal, typically a 10 mm wrench.? Little wire from Positive to removed Ground; it probably only takes a few seconds.....but, what the heck, capacitors are a little mysterious.....so draining them overnight is not a bad idea.


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Re: ECU reset

 

No.? It is simple and straightforward.? Like I said, remove Negative from battery.? Hook up jumper from Positive to removed ground wire at Negative like I spoke of.? Electricity will effortlessly drain out of capacitors in ECU; I spoke of overnight, and this is probably not necessary, heck just go buy a pizza or something; but in my experience your really want old memory to be totally deleted.? The ECU's mind will now be back to factory settings. But really....keep the Red Wire on Positive Terminal.? Disconnect the Black Wire on Negative Terminal, typically a 10 mm wrench.? Little wire from Positive to removed Ground; it probably only takes a few seconds.....but, what the heck, capacitors are a little mysterious.....so draining them overnight is not a bad idea.


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_._,_._,_
Re: ECU reset

 

Richard, I've been trying to understand your suggestion to disconnect battery ground then connect positve to that ground. Won't this still create a short and wreak havoc on the capacitors? Maybe I'm not understanding which positive and ground wires are involved?
--
Freedom van Go
1989 Westy, 3.3L SVX
Re: Anyone want a free chipped EG33 ECU and/or MAF sensor?

 

It will most likely be a D1, although the tune chip would be an aftermarket addon. All OBD1 versions ('91 to '94) are interchangable, I think. Someone please correct me if I'm wrong, as I have limited investigative knowledge and would like to know more.
--
Freedom van Go
1989 Westy, 3.3L SVX
Re: Anyone want a free chipped EG33 ECU and/or MAF sensor?

 

Not sure about version. I believe it came out of a '92. It has an EcuTune chip.?


On Sun, Feb 5, 2023, 19:22 Duncan <whocanduncan1@...> wrote:
3.0...that's what I should have done 1,000s of dollars ago. keep in mind if Derek changes his mind on the ecu. btw, what version is it?

Duncan
--
Freedom van Go
1989 Westy, 3.3L SVX

Re: Anyone want a free chipped EG33 ECU and/or MAF sensor?

 
Edited

3.0...that's what I should have done 1,000s of dollars ago. Keep me (edit) in mind if Derek changes his mind on the ecu. btw, what version is it?

Duncan
--
Freedom van Go
1989 Westy, 3.3L SVX
Re: Anyone want a free chipped EG33 ECU and/or MAF sensor?

 

Aha. Thanks for the explanation John.
Carry on!!
Best
Brent
Re: Anyone want a free chipped EG33 ECU and/or MAF sensor?

 

Yes please.?
Derek
Nofdhall@...


On Sat, Feb 4, 2023 at 8:14 AM, Jeff Morrow
<situationiste@...> wrote:
I threw a rod in the engine (now replaced by an EZ30). Pretty sure they work.
Jeff?

On Sat, Feb 4, 2023, 12:06 John Rodgers <jrodgers113@...> wrote:
Thanks for that tip. Will move it closer and see?what happens.

On Thu, Feb 2, 2023 at 10:07 PM Noras dad <norasonlydad@...> wrote:
John,
If your speed sensor is set too far away you will get this problem. Same thing with Hall effect sensors. Put your sensor closer and you'll get better pick up.
Good luck
Terry

Terry A Shaw


On Thu, 2 Feb 2023 at 01:12, John Rodgers <jrodgers113@...> wrote:
Subject says it all. Have 2.5 installed with Precis ECU the harness conversion done by Busaru. Stock '91 auto tranny and stock 14 inch wheels. At 65 mph and above the engine starts bucking. The only way to stop it is to reduce speed below 65 mph. On a few occasions I have managed?to hit 70 before bucking sets in. At 70 mph the tach reads 4000 rpm. Has anyone got any ideas about the problem and how to fix it? I should be able to turn 6500 rpm easily with this engine but I have no particular need to do faster than 70 in most cases. The VSS is Busaru and is set 4 mm clearance from stub axle flange?bolts.?

All comments and and suggestions would be appreciated,
Re: Engine rapidly off/on/off/on/off/on at speed

 

I am not sure if this is relevant or not....but I have an old Audiovox CCS-100 Cruise Control on my Vanagon with EJ22.? It works Fantastic!? It uses magnets on axles to determine speed.? Well...I replaced those magnets with modern ones....you know, the rare earth metal kind.? Before, if I would hit a bump in the road, the Cruise Control would lose it's mind and shut down.? Now, with powerful rare earth magnets, everything goes just fine, bumps in road or not.? It made a huge difference.

On Saturday, February 4, 2023 at 08:06:08 AM PST, John Rodgers <jrodgers113@...> wrote:


Thanks for that tip. Will move it closer and see?what happens.


On Thu, Feb 2, 2023 at 10:07 PM Noras dad <norasonlydad@...> wrote:
John,
If your speed sensor is set too far away you will get this problem. Same thing with Hall effect sensors. Put your sensor closer and you'll get better pick up.
Good luck
Terry

Terry A Shaw


On Thu, 2 Feb 2023 at 01:12, John Rodgers <jrodgers113@...> wrote:
Subject says it all. Have 2.5 installed with Precis ECU the harness conversion done by Busaru. Stock '91 auto tranny and stock 14 inch wheels. At 65 mph and above the engine starts bucking. The only way to stop it is to reduce speed below 65 mph. On a few occasions I have managed?to hit 70 before bucking sets in. At 70 mph the tach reads 4000 rpm. Has anyone got any ideas about the problem and how to fix it? I should be able to turn 6500 rpm easily with this engine but I have no particular need to do faster than 70 in most cases. The VSS is Busaru and is set 4 mm clearance from stub axle flange?bolts.?

All comments and and suggestions would be appreciated,
Anyone want a free chipped EG33 ECU and/or MAF sensor?

 

I threw a rod in the engine (now replaced by an EZ30). Pretty sure they work.
Jeff?

On Sat, Feb 4, 2023, 12:06 John Rodgers <jrodgers113@...> wrote:
Thanks for that tip. Will move it closer and see?what happens.

On Thu, Feb 2, 2023 at 10:07 PM Noras dad <norasonlydad@...> wrote:
John,
If your speed sensor is set too far away you will get this problem. Same thing with Hall effect sensors. Put your sensor closer and you'll get better pick up.
Good luck
Terry

Terry A Shaw


On Thu, 2 Feb 2023 at 01:12, John Rodgers <jrodgers113@...> wrote:
Subject says it all. Have 2.5 installed with Precis ECU the harness conversion done by Busaru. Stock '91 auto tranny and stock 14 inch wheels. At 65 mph and above the engine starts bucking. The only way to stop it is to reduce speed below 65 mph. On a few occasions I have managed?to hit 70 before bucking sets in. At 70 mph the tach reads 4000 rpm. Has anyone got any ideas about the problem and how to fix it? I should be able to turn 6500 rpm easily with this engine but I have no particular need to do faster than 70 in most cases. The VSS is Busaru and is set 4 mm clearance from stub axle flange?bolts.?

All comments and and suggestions would be appreciated,
Re: Engine rapidly off/on/off/on/off/on at speed

 

Thanks for that tip. Will move it closer and see?what happens.


On Thu, Feb 2, 2023 at 10:07 PM Noras dad <norasonlydad@...> wrote:
John,
If your speed sensor is set too far away you will get this problem. Same thing with Hall effect sensors. Put your sensor closer and you'll get better pick up.
Good luck
Terry

Terry A Shaw


On Thu, 2 Feb 2023 at 01:12, John Rodgers <jrodgers113@...> wrote:
Subject says it all. Have 2.5 installed with Precis ECU the harness conversion done by Busaru. Stock '91 auto tranny and stock 14 inch wheels. At 65 mph and above the engine starts bucking. The only way to stop it is to reduce speed below 65 mph. On a few occasions I have managed?to hit 70 before bucking sets in. At 70 mph the tach reads 4000 rpm. Has anyone got any ideas about the problem and how to fix it? I should be able to turn 6500 rpm easily with this engine but I have no particular need to do faster than 70 in most cases. The VSS is Busaru and is set 4 mm clearance from stub axle flange?bolts.?

All comments and and suggestions would be appreciated,
Re: Engine rapidly off/on/off/on/off/on at speed

 

Brent,
Mine is a stock ecu. I said it came from a Precis. I misspoke. It came from an Impreza.?

John

On Sat, Feb 4, 2023 at 8:00 AM Brent Weide <brent.weide@...> wrote:
Morning John.
Sorry you¡¯re having trouble with your conversion.
Because you have a non stock ecu we will have difficulty supporting you.
My suggestion is to use the conversion mechanic, and/or the ecu vendor (in that order) to get support for the issue.
Non stock component support conversations have limited value to our group as a whole and I will discourage them.
Best,
Brent
Re: Engine rapidly off/on/off/on/off/on at speed

 

Morning John.
Sorry you¡¯re having trouble with your conversion.
Because you have a non stock ecu we will have difficulty supporting you.
My suggestion is to use the conversion mechanic, and/or the ecu vendor (in that order) to get support for the issue.
Non stock component support conversations have limited value to our group as a whole and I will discourage them.
Best,
Brent
Re: Engine rapidly off/on/off/on/off/on at speed

 

John,
If your speed sensor is set too far away you will get this problem. Same thing with Hall effect sensors. Put your sensor closer and you'll get better pick up.
Good luck
Terry

Terry A Shaw


On Thu, 2 Feb 2023 at 01:12, John Rodgers <jrodgers113@...> wrote:
Subject says it all. Have 2.5 installed with Precis ECU the harness conversion done by Busaru. Stock '91 auto tranny and stock 14 inch wheels. At 65 mph and above the engine starts bucking. The only way to stop it is to reduce speed below 65 mph. On a few occasions I have managed?to hit 70 before bucking sets in. At 70 mph the tach reads 4000 rpm. Has anyone got any ideas about the problem and how to fix it? I should be able to turn 6500 rpm easily with this engine but I have no particular need to do faster than 70 in most cases. The VSS is Busaru and is set 4 mm clearance from stub axle flange?bolts.?

All comments and and suggestions would be appreciated,
Re: ECU reset

 

What plugs and gap are you running Sean? Copper or platinum NGKs ran best at 0.043-0.044 I've found with my 02. Smaller resulted in high end bogging.
Re: Engine rapidly off/on/off/on/off/on at speed

 

Yes 4mm? seems big. I set my SC VSS distance at 0.045 with a feeler gauge just like the plugs.
Re: ECU reset

 

It's easy to reset ECU to factory settings.? This is especially needed after cleaning out all the gunk in IACV and Throttle body and new PCV valve and associated hoses.? Reason is:? ECU still has old info stored in it, as it was desperately trying to overcome gunk.? To delete all old info in ECU, you've got to drain all electricity stored in it's capacitors, which functions to maintain memory.? First, disconnect Negative at battery.? Second, run a jumper from Positive to that removed ground wire.? Let it sit overnight.? Hook back up.? Immediately RPM's will race towards 3000 or so.? Don't panic.? It will take about 20 cycles of startup, drive, shut down for things to settle down as ECU "learns" new parameters.? Now the ECU will do all the stuff it was designed to do. BTW...this info is for 2.2 motor....but I am sure it's similar for others.

On Thursday, February 2, 2023 at 08:05:13 AM PST, SEAN GARRETT via groups.io <doit.outdoors@...> wrote:


I thought i had this procedure bookmarked ¡­ how do you reset the ECU ? Remove pos a neg terminal connectors , then ground out the pos wire ?

Recently had the power wire from alt to black box post shortened (it was overly long) and running hot to touch. This solved erratic idle issue and running rich at start. I still have some bogging at hard acceleration and very minor reving after warm up at a stop light. Yes my IAC is clean and im gonna have the TPS checked and set to proper voltage. Gonna also check vacuum hoses as well as pcv stack.

Any other ideas ?
SeanG
87 Syncro
2000 2.5
Re: Engine rapidly off/on/off/on/off/on at speed

 

I argue this is basic for working condition, but I thought your issue was at 65 mph +.?
Dont you already know it works at speeds below 65 mph ? I thought that was implicit or verified.

Just trying to keep the troubleshooting focused on your issue, above 65 mph. Not discount advice :-)

? --? Sean G


On Thursday, February 2, 2023 at 10:21:17 AM MST, John Rodgers <jrodgers113@...> wrote:
Thanks for that!


On Thu, Feb 2, 2023 at 7:40 AM mrk1957 via <mrk1957=[email protected]> wrote:
To check your speed sensor. Raise rear wheel with the sensor. Turn ignition on engine off. Rotate wheel and watch red light on sensor. The red light should on and off as you rotate the wheel and sensor passes the cv bolts?

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