Resetting ECU without CEL light on
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From: Sydney, Australia
Resetting ECU without CEL light on
Hey,
Just put on quite an extensive list of mods: Exhaust, crawford cats, plenum, pop charger. No CEL light has come on yet but just want to reset the ECU to be safe an possibly receive some benefits. In doing the pedal method, How do you know if the ECU has reset if there is no CEL light to go off in the first place????
Just put on quite an extensive list of mods: Exhaust, crawford cats, plenum, pop charger. No CEL light has come on yet but just want to reset the ECU to be safe an possibly receive some benefits. In doing the pedal method, How do you know if the ECU has reset if there is no CEL light to go off in the first place????
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From: Massillon, OH
???
Hmmmm... this has been talked about before and I don't really know if a "DEFINITE" answer has ever been agreed upon.
I have personally spoken to Tadashi while I was at TechnoSquare and he said that to reset the ECU, just remove the negative battery terminal for a couple minutes.
Other people say you need to leave it disconnected for over 13 hours.
Still others say that you have to do the accellerator pedal "Hokie Pokie" to reset it.
In the end... I'm just not really sure.
I have personally spoken to Tadashi while I was at TechnoSquare and he said that to reset the ECU, just remove the negative battery terminal for a couple minutes.
Other people say you need to leave it disconnected for over 13 hours.
Still others say that you have to do the accellerator pedal "Hokie Pokie" to reset it.
In the end... I'm just not really sure.
Here is the "pedal hokie pokie". It works. Also, you can just unplug the battery overnight too.
http://www.technosquareinc.com/350reset.htm
http://www.technosquareinc.com/350reset.htm
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From: Sydney, Australia
Not to be rude,
BUT i know it works. My question is how do you know if it works if there is no CEL light to disspaear appear when reset completely.
Considering you need to be very accurate with the reset, u may not have reset the ECU and may not be aware if there is no CEL light to dissapear?????????
BUT i know it works. My question is how do you know if it works if there is no CEL light to disspaear appear when reset completely.
Considering you need to be very accurate with the reset, u may not have reset the ECU and may not be aware if there is no CEL light to dissapear?????????
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From: NY
Whats up? I had the same question. I never got a proper answer. If I were you I wouldnt worry about it. What I did was unplug the negative battery terminal before i started working on the car. After a few hours put it back on. To know if it worked your station presets should be all messed up.
Screw the pedal crap...
Screw the pedal crap...
The "pedal crap" works in about 30 seconds. All I can tell you is that you just have to trust that it works. You are correct. No CEL light to go out and "prove" that it works but you may notice a slight improvement in performance.
It is only temporary though since it has been theorized that the ECU will eventually "learn" that you have modded and revert back to it's old settings.
It is only temporary though since it has been theorized that the ECU will eventually "learn" that you have modded and revert back to it's old settings.
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By what I have heard, the only true way to completely reset the ECU is to unplug BOTH battery terminals, touch/clamp them together for 5+ seconds, and then reconnect to the battery - I have done this and had a much more noticible difference than the pedal dance... and I was never "for sure" that the pedal dance worked b/c it never deleted my radio presets, etc...
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From: Massillon, OH
New ECU reset method
I discovered a new way to reset the ECU if you don't have a SES light.
First, disconnect the negative battery terminal for about 10 minutes. Next, while standing on one foot, grab a hold of the negative terminal and count backwards from 10 to 1 while patting your head and shaking your hips from side to side. Lastly, perform 3 sommersalts and reconnect the negative battery terminal and start the car.
Timing is critical for the reset to work properly, unfortunately there is no way to tell if it worked or not because there is no SES light to let you know, so if in doubt... do it again.
-Chris
First, disconnect the negative battery terminal for about 10 minutes. Next, while standing on one foot, grab a hold of the negative terminal and count backwards from 10 to 1 while patting your head and shaking your hips from side to side. Lastly, perform 3 sommersalts and reconnect the negative battery terminal and start the car.
Timing is critical for the reset to work properly, unfortunately there is no way to tell if it worked or not because there is no SES light to let you know, so if in doubt... do it again.
-Chris
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From: Sydney, Australia
Final question,
If the CEL light doesnt come on maybe it is not neccessary for you to reset the ECU. the CEL light indicates that there is a problem with the car. However, if there is no light and therefore no prblem surely you dont have to reset it
OR, would people aggree that in resetting the ECU it learns your mods and you gain more performance out of them?????????????
If the CEL light doesnt come on maybe it is not neccessary for you to reset the ECU. the CEL light indicates that there is a problem with the car. However, if there is no light and therefore no prblem surely you dont have to reset it
OR, would people aggree that in resetting the ECU it learns your mods and you gain more performance out of them?????????????
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From: Gehenna
Originally posted by bwzabodyn
By what I have heard, the only true way to completely reset the ECU is to unplug BOTH battery terminals, touch/clamp them together for 5+ seconds, and then reconnect to the battery - I have done this and had a much more noticible difference than the pedal dance... and I was never "for sure" that the pedal dance worked b/c it never deleted my radio presets, etc...
By what I have heard, the only true way to completely reset the ECU is to unplug BOTH battery terminals, touch/clamp them together for 5+ seconds, and then reconnect to the battery - I have done this and had a much more noticible difference than the pedal dance... and I was never "for sure" that the pedal dance worked b/c it never deleted my radio presets, etc...
Wrong, at least partly. Yes, this probably will turn off the Check Engine light, atleast for a while. But his late model car uses OBD II - the auto industry's latest diagnostic software. It might not have volatile memory that would be erased by disconnecting the battery. Plus, it takes a while, sometimes as long as an hour of normal driving, for engine management computer to relearn it's new trim settings for fuel and spark - so the car might have run poorly enough to fail if he had it tested first thing in the morning. Moreover, this technique will destroy all the radio presets, the date and time on the dash, the seat and mirror memory, the anti-theft codes in the stereo, an maybe the codes in the keyless entry.
Plus, why would you think the pedal procedure will reset the radio? they're not related or connected in anyway. The pedal procedure only reset the ECU, nothing else.
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From: Gehenna
Originally posted by mmorris
Final question,
If the CEL light doesnt come on maybe it is not neccessary for you to reset the ECU. the CEL light indicates that there is a problem with the car. However, if there is no light and therefore no prblem surely you dont have to reset it
OR, would people aggree that in resetting the ECU it learns your mods and you gain more performance out of them?????????????
Final question,
If the CEL light doesnt come on maybe it is not neccessary for you to reset the ECU. the CEL light indicates that there is a problem with the car. However, if there is no light and therefore no prblem surely you dont have to reset it
OR, would people aggree that in resetting the ECU it learns your mods and you gain more performance out of them?????????????
Resetting the ECU should give more performance. Since it adapts it should balance your mods out. I think it'll do it even without resetting the ECU, but resetting will make it faster (learning wise)
OR, would people aggree that in resetting the ECU it learns your mods and you gain more performance out of them?????????????
Even with all of the debate however, I don't think it was ever definitively addressed. The consensus was the you would put on a mod, say a CAI and then reset the ECU (the pedal technique) you would then appreciate an increase in performance for a while until the ECU "relearned" its settings and you were back to square one.
Again, this was the consensus but it was never definitely proven.
As for the radio presets, resetting your ECU has no effect on them.
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From: Massillon, OH
Originally posted by Dr Bonz
This stuff was debated AD NAUSEUM for months about a year or so ago so if you search you will find a lot on it.
Even with all of the debate however, I don't think it was ever definitively addressed. The consensus was the you would put on a mod, say a CAI and then reset the ECU (the pedal technique) you would then appreciate an increase in performance for a while until the ECU "relearned" its settings and you were back to square one.
Again, this was the consensus but it was never definitely proven.
As for the radio presets, resetting your ECU has no effect on them.
This stuff was debated AD NAUSEUM for months about a year or so ago so if you search you will find a lot on it.
Even with all of the debate however, I don't think it was ever definitively addressed. The consensus was the you would put on a mod, say a CAI and then reset the ECU (the pedal technique) you would then appreciate an increase in performance for a while until the ECU "relearned" its settings and you were back to square one.
Again, this was the consensus but it was never definitely proven.
As for the radio presets, resetting your ECU has no effect on them.
-Chris
actually the Z ecu learns your mods quite easily. You can do it either by driving, or by resetting the ecu.
Both the pedal method AND the battery disconnect work. pedal dance retains radio settings, battery disconnect does not.
Unless your ecu is flashed already, it will, over time, tend to revert back towards a more conservative map after mods are performed....the reflashed ecu, or some form of fuel/timing control is a critical step in getting consistent results from your mods.
Both the pedal method AND the battery disconnect work. pedal dance retains radio settings, battery disconnect does not.
Unless your ecu is flashed already, it will, over time, tend to revert back towards a more conservative map after mods are performed....the reflashed ecu, or some form of fuel/timing control is a critical step in getting consistent results from your mods.
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From: Massillon, OH
Originally posted by Z1 Performance
actually the Z ecu learns your mods quite easily. You can do it either by driving, or by resetting the ecu.
Both the pedal method AND the battery disconnect work. pedal dance retains radio settings, battery disconnect does not.
Unless your ecu is flashed already, it will, over time, tend to revert back towards a more conservative map after mods are performed....the reflashed ecu, or some form of fuel/timing control is a critical step in getting consistent results from your mods.
actually the Z ecu learns your mods quite easily. You can do it either by driving, or by resetting the ecu.
Both the pedal method AND the battery disconnect work. pedal dance retains radio settings, battery disconnect does not.
Unless your ecu is flashed already, it will, over time, tend to revert back towards a more conservative map after mods are performed....the reflashed ecu, or some form of fuel/timing control is a critical step in getting consistent results from your mods.
Hmmm... that TS flash is sounding better and better every day.
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From: columbia md.
ECU
Originally posted by Z1 Performance
actually the Z ecu learns your mods quite easily. You can do it either by driving, or by resetting the ecu.
Both the pedal method AND the battery disconnect work. pedal dance retains radio settings, battery disconnect does not.
Unless your ecu is flashed already, it will, over time, tend to revert back towards a more conservative map after mods are performed....the reflashed ecu, or some form of fuel/timing control is a critical step in getting consistent results from your mods.
actually the Z ecu learns your mods quite easily. You can do it either by driving, or by resetting the ecu.
Both the pedal method AND the battery disconnect work. pedal dance retains radio settings, battery disconnect does not.
Unless your ecu is flashed already, it will, over time, tend to revert back towards a more conservative map after mods are performed....the reflashed ecu, or some form of fuel/timing control is a critical step in getting consistent results from your mods.
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