Hi again,

I've decided to wait on the lowering kit and just do clear corners and a CAI. I got some advice from a friend about reprogramming the ECU to give me better economy and smoother engine response if I was to put in a cold air.

I just wanted to check in with some of you guys to see if this is the right thing to do:

After you get a performance upgrade (i.e. exhaust, intake etc.) make sure to reprogram the computer:

* Turn on the car and warm it up (make sure that it is at normal idle).

* Turn off the car and pull out your ECU fuse located in the fuse box under the bonnet.

* Keep fuse out for at least 5 to 10 minutes.

* Plug fuse back in and close bonnet.

* Start your car making sure not to touch the accelerator.

* Let the car idle (at its normal idle) for about 5 minutes.

* Shut off the car and restart it. Take it for a test drive and you should notice the difference.

After doing these steps he told me that it should work. He said the ECU is originally programmed to mix optimal amounts of air and petrol for a factory spec car (no modifications). By taking out the fuse you kill all power to your computer, therefore resetting the 'program' that gives you the right mixture. By not touching the accelertor as you fire it back up, the ECU will reprogram itself to give you the best MPG possible based on your current set-up.

Is this all legit? Also, where is the fuse box that they refer to as being under the bonnet? Is that just the area under the steering wheel that says fuses?

Thanks.

 

sounds about right.

 

What year is your car?

Oh, and the unofficial name for this is "Resetting" the ECU. You can reprogram the ECU later when you have more mods with a Hondata.

Shingo

 

I would be doing this to a 1998 Acura Integra LS 2 Door

 

Is this really true? How come I've never heard of such a thing....

 

this is how you reset the ecu, if there was a stored code and such, the ecu will measure different levels with diff. sensors such as the map and O2 sensors, not sure how "tuned" it will be but it will reset verything, and the fuse will be in the fuse box on the pass. side under the hood beside the batt., should be listed on top of fuse cover, and should be a 7.5 blade fuse, in back of box by fire wall. hope this helps

 

Ive never heard of this. I might have to try it

 

I had always thought that by just letting it sit for a while while on that the computer would sense the greater oxygen and compensate by adding more fuel. Why does it have to be re-set. I thought the comp would compensate by itself for a mod as small as a cai?

 

i've also heard of pulling your negative battery cable instead of the fuse and getting the same effect. also, if you have a stock radio, you better have the code for it cause pulling the fuse or disconnecting the battery will erase all your radio settings.

 

When I bought my car the dealership told me to put 91, 93, or 94 octane in because if I used 87 the ECU would retard the timing and I would get bad gas mileage. Now this could be an old wives tail but I have always put 93 or 94 in the car. But if this is true wouldn't the ECU also compensate for changes in the amount of air going in by itself?

Just a thought...but I am putting an AEM CAI on my car this week when it gets in so let me know.

Thanks.