I think the question here is: are you sure it only goes between the pedal and the ecm? What if, through the OBDII port, it inserts itself between the ecm/pedal AND ecm/throttle connections, effectively bypassing the ECM?

 

The argument based on some other persons misconceptions means absolutely nothing to me... It reminds me of some one that saw a low budget war movie based on a novel by a person that had never been in a war trying to tell me what it was like to be an 18 year old Marine in a A Shau Valley for 56 days in 1969.

 

fixed

Rev hang annoyed the hell out of me at first but I got used to shifting the car quick and pretty much forgot about it.

 

No way. This would require effectively corrupting the ECM to operate differently. All it can do is alter inputs to the ECM. Since it's on the pedal side of the ECM that's what it does.

 

What's your point, bullet? That the Fit has DBW? That's a very nice page describing it, but it doesn't advocate putting third party "made in China" boxes to alter the input to the ECM.

 

Sorry, Dog. Altering the ECM logic (reflash) will have the effect you're describing (you are running an aftermarket tune on your GD, right?). The box that goes between the pedal and the ECM will not. The throttle closes no faster than Honda programmed it in order to lower emissions. Think about it.

 

The problem is, you are stuck on the assumption it only connects between the pedal and ecm.

The ecm still has to OUTPUT a signal to the throttle body, and that can easily be interrupted/intercepted. You don't have to alter what the ecu is outputting, just what the throttle is receiving. Again, bypassing the ecm, not manipulating it.

I don't know the details... and I'll admit I have no experience with it... but I'm not going to make the foolish assumptions you're making.

 

The aftermarket throttle controllers do not connect between the ECM and the throttle. What you are suggesting is somehow the designers managed a real-time ECM hack via the OBDII port to alter the throttle logic. No one (to my knowledge) is even marketing an aftermarket tune for GE ECMs. All these do is change the amount of pedal signal to the ECM. It gets power to retain settings from the OBDII port.

 

Okay, I admit the assumption of having an ecm to throttle interrupt is wrong.

I think I'll excuse myself from this thread now.

 

I'll hop in on this one just from a logic standpoint.

If the stock throttle control registers the throttle body at the following rate (These are Examples, not actual numbers);
Pedal | Stock % | ETC %
10% | 15% | 20%
20% | 30% | 40%
40% | 60% | 80%
50% | 75% | 100%
66% | 100% | N/A

... doesn't the throttle respond more quickly when the pedal is being pressed and released? I think that there's an assumption that the throttle returns to 0% Position at a set rate and not based upon the position of the pedal. Is this a known fact and if not, the spring/return rate of the pedal would determine the throttle response. In this case an ETC would help increase the rate of throttle response in both directions.

~SB

 

Do any of you actually have an electronic throttle controller, or are you all just arguing based on your infallible logic?

I've had an electronic throttle controller, it does not help reduce throttle lag/hang. All it does is alter how the throttle perceives the gas pedal position. For example, it can trick the throttle into reading a floored pedal when in reality, you're only pressing the pedal halfway. However, the throttle still responds only as quickly as when you slam the pedal to the floor as fast as you can.

It doesn't accelerate the signal to the throttle. It doesn't lighten your flywheel for a faster engine response. It's just a piggyback that alters the throttle signal, Steve244 is right.

 

I get your logic Specboy, and in theory, it does make sense. However in reality, the difference you propose, whether or not it is real, is microscopically minuscule and literally imperceptible. It would be the same as slamming your pedal to the floor and quickly letting it up to attempt getting a quicker rev response. At that point, the throttle position is no longer a limiting factor in the engine's response.

 

I'm thinking that the TB is controlled by a Servo and most all servos have the same speed capability in both directions so the TB response would be dictated by the position of the pedal. tighten up the positioning of the pedal in relation to the servo and you have quicker response. That said, it isn't going to change the flywheel speed without some weight reduction on that end. The combination of a lighter Flywheel and a throttle controller I would think would be the best overall option to reduce rev hang.

As for actual response, I think it'll be greater than what any of us (without one) would think but not as absolute as basic logic would dictate.

That said... I think I still want one .

~SB

 

I think the real issue here is that you can't get the throttle 100% open no matter what. Iirc the gd chassis at wot was only open 80 of the way. That chart shows 100% but I believe it means 100% of the programmed 80% functionality. Hopefully someone followed that

 

Sorry for reviving a bit of an old thread, but the rev hang on my fit is so bad that I want to sell it after only two months of ownership.
I deleted the CDV in the first week. That's out of the question.

Throttle controllers have always been just a signal modifier. The ECM has separate values for how much it blips the throttle based on detected unburned fuel residing in the cylinders/intake charge between shifts. Whether it calculates that amount of fuel based on throttle position when the clutch is depressed or fuel pressure at the moment the clutch is depressed I know not. Maybe it's both, maybe it's something else like injector pulse. I don't know.

I picked up a barely used 2009 Mazda3 which is communicative and responsive in every way compared to the Fit. I love it.

Seriously considering selling my Fit already even after only 590 miles.

Unless I can get a reflash that makes this rev hang disappear, I'm going to make this damned car disappear.

 

Glad this old thread got revisited. I had no idea that the ETC eliminated rev hang. I considered a ETC for other reasons before but never pulled the trigger. Now I will definitely be buying one to get rid of rev hang. Next up will be replacing the funky valved clutch slave cylinder to get normal clutch feel. Those two things are my only pet peeves with the Fit.

_

 

Save your money, it can't work magic. Coyote has his ECU's re-flash confused with the overpriced-aftermarket box (ETC) that goes between the gas pedal and ECU.

 

^ True. The ETC does nothing for rev hang or throttle lag. Some people don't seem to understand the difference between magnitude of throttle response versus the responsiveness of throttle input.

The Hondata flashpro is supposed to do something with rev hang and/or throttle response, but I haven't tried it out yet and after seeing all these testimonies about the effects of an ETC, I'm not going to believe anything unless I try it myself.

 

Well see above post. He clearly stated his rev hang was eliminated before he did the other mods.

_

 

What's the beef with the rev-hang anyway?