Idle Learn Procedure

[der Mond]

Some guys say that you can follow this factory-specified procedure after disconnecting the battery for awhile, which they say resets the ECM. However, the HELM manual and alldatadiy say that before performing idle learn procedure, one must "Reset the ECM/PCM with HDS." Anyone know the truth?

[claymore]

Resetting the ECU works either way and has the same results. But anyway doing the idle learn is a waste of time the car will do the same thing over a short period of time just by driving it.

[manxman]

Some guys say that you can follow this factory-specified procedure after disconnecting the battery for awhile, which they say resets the ECM. However, the HELM manual and alldatadiy say that before performing idle learn procedure, one must "Reset the ECM/PCM with HDS." Anyone know the truth?
Hi Dennis-
Welcome to the forums. On my GD3 when installing the K&N short ram intake, and then replacing it with the PRM cold air intake, I used the factory procedure but doubted that it was even necessary. In two years, I never had a CEL come on. Same story with the GE8. However, I will check the '09 Fit Helm Service Manual to see what it says on this matter just out of curiosity.

But to add credibility to the Idle Relearn Procedure, even though my Fit never seemed to require it, I installed a K&N Typhoon intake system on my '97 F-150 V-8 engine. It ran badly and at a reduced idle speed until I disconnected the battery and reconnected it again. The idle problems went away on the Ford.

[manxman]

Hi Dennis-
Welcome to the forums. On my GD3 when installing the K&N short ram intake, and then replacing it with the PRM cold air intake, I used the factory procedure but doubted that it was even necessary. In two years, I never had a CEL come on. Same story with the GE8. However, I will check the '09 Fit Helm Service Manual to see what it says on this matter just out of curiosity.

But to add credibility to the Idle Relearn Procedure, even though my Fit never seemed to require it, I installed a K&N Typhoon intake system on my '97 F-150 V-8 engine. It ran badly and at a reduced idle speed until I disconnected the battery and reconnected it again. The idle problems went away on the Ford.
OMG! Almost a posting traffic jam on HFF- you're up early claymore, and I'm up late.

[der Mond]

Thanks, fellas, I appreciate it. My experience was, D/C the battery, removed the cracked Supa Sucka intake, obsessed installing the PRM for two hours, reconnected the battery, started the car and let it idle ten minutes, and SHAZAM - what a difference! I wouldn't want my ECM set any other way, the car is just a hoot to drive now, so thanks for the feedback, it makes sense. I asked H-Fit for a refund, but they responded that since the SS is "still in the warranty period" they will repair or replace it. The PRM definitely makes more ju-ju, however, and I wouldn't install another H-Fit intake if you paid me, and I let Johnny Chen at H-Fit know what I think of their product. I also let the PRM guy know what I think of his product!

[claymore]

Hey things will pick up when the kids find out that you can get good technical advice here

[manxman]

Thanks, fellas, I appreciate it. My experience was, D/C the battery, removed the cracked Supa Sucka intake, obsessed installing the PRM for two hours, reconnected the battery, started the car and let it idle ten minutes, and SHAZAM - what a difference! I wouldn't want my ECM set any other way, the car is just a hoot to drive now, so thanks for the feedback, it makes sense. I asked H-Fit for a refund, but they responded that since the SS is "still in the warranty period" they will repair or replace it. The PRM definitely makes more ju-ju, however, and I wouldn't install another H-Fit intake if you paid me, and I let Johnny Chen at H-Fit know what I think of their product. I also let the PRM guy know what I think of his product!
Dennis,
I'm glad that you got onto the PRM bandwagon. It is obvious that the damage that occurred to your H-Fit unit, due to poor design, CANNOT happen to the PRM. You bought the plastic chamber intake partially on my advice and I regret that fact. At that time, quality intakes for the GD's were few and far between. H-Fit was so open about their design, manufacturing and marketing philosophies, and seemed so eager to help the early GD's obtain more power, their intake seemed to be very well put together. Now we know the real facts. The only reason that I didn't buy one myself was their lack of even trying to obtain CARB exemption for us Californians. And then I saw the PRM design for the first time, and my engineering background made me fall in love with the design concept at first sight.

On fitfreak.net, I went WAY out of my way to hammer home the flaws of the T1R chamber intake for the GE8's, and was just as obnoxious about it as I could possibly be. I don't regret that at all. The belief of the ignorant children that you can get more air out of a box with a filter on the end than you can get out of a tube with a filter on the end was just too ridiculous to let stand. That probably helped to get me banned from the site, but I still don't regret it. I am still lurking on fitfreak to see how much of a change in design my hammering accomplished when the "toaster ovens" actually are released on the market. At the very least, I'll bet that there will be a water shield over the filter to keep the GE air scoop from drowning the filter in the rain.

Anyway, welcome to the site again!

[der Mond]

I have to agree, the chamber concept is useless and just another way to attempt to impress others with a big flashy carbon fiber piece and a visible filter. It has taken me awhile to adjust to the Fit forums after Rennlist and Pelican Parts. There are a lot of folks here being taken in by carbon-fiber and chrome bling and manufacturers like H-Fit that seem credible and cite their facts and figures so they can extract dollars from young people (and older farts like me) :eek:

[claymore]

Hey welcome to the older farts club

[der Mond]

Thanks!

[claymore]

Got to clear up some "Idle learn" misconceptions. On that other site some people are advising that this is an do all end all procedure and it cures several ailments that pop up on the Fit/Jazz.

We will be using some logical thinking here so pull up a chair and put on your "thinking caps" ( any old people will remember thinking caps).

But anyway what one does when doing the idle learn is disconnecting the battery as the first step.............. now here is the logic part...... we can stop the procedure right here put the cables back on and what have you done?

What that very first step in the procedure is doing is RESETTING THE WHOLE ECM not idle learn. Idle learn is just a step in RESETTING THE WHOLE ECM and one doesn't even have to do idle learn the ECM will set the idle over the course of several start ups and drives all by itself.

What good results that people are promoting as a miracle cure are from RESETTING THE WHOLE ECM not from doing the idle learn.

Think about it for a minute one cannot perform the idle learn without resetting the whole ECM and the resetting of the ECM is what is clearing up some problems NOT THE IDLE LEARN PROCEDURE. All the whole idle learn procedure does is SET THE IDLE SPEED nothing else which the ECM would do anyway all by itself over time.

The confusion came about when someone discovered that the idle learn procedure was included on a pre-delivery check list to be done only if the idle was not in the proper range.

All a mechanic would do is look at the tach and see if the idle was ok and if it wasn't then do this procedure so the customer wouldn't have to drive a brand new car with a varying idle for the first few drives that's it nothing special nothing magic.

[der Mond]

Amen!