types1967

smitty brought it to my attention as i have had hiccups so i soldered in my esm like smitty and other guys.make sure you solder that esm it makes a world of difference my car idles much better now and is smooth as glass.those connectors are not sufficient to make good contact thats why they have to be soldered!!!

scalbert

Hrmm, I don't have the ESM installed and mine still works well. :P

types1967

ha ha very funny steve hmmmm maybe because you have an e*****e lol.it does make a big difference for the meantime until something better comes along lol

kid_dr

What's a hiccup? (same thing as a hiccough, right?). I have had them myself a time or two, but the car has been as smooth as silk since day one.

types1967

its just a hesitation or missfire due to bad connections of the wires out of the esm

kid_dr

Yes, I know, I was just kidding -sorry. Actually to be honest, I have experienced a hiccup maybe three or four times. It has always been prior to the engine getting up to full operating temp (always in the same area of town - about 2 miles from where I live) - seems like it's only happened accelerating in a higher gear (3rd, or 4th) and once it does it, I can't ever get it to do it again - on that same day anyway. It has been random - in it's occurance (once every month or two), but predictable (about 3 minutes into my drive). It is so subtle that it never has really bothered me, but I have been aware. Certainly, I would not feel the need to do anything about it.

NSX-Tuner

FYI -

Since I had the ESM/ECU connections soldered two weeks ago, my gas mileage has improved by 2-4 MPG. This makes perfect sense since the previous loose connections were causing the ECU to add extra fuel.

types1967

i know the car is so smooth now

Red Rider

Maybe you can check mine at the meet on the 12th.

allmotor_2000

It is possible that there was some additional contact resistance causing the MAP voltage sent to the ECU to change somewhat; however it would be in the 1-2 ohm range which isn't going to significantly affect the reading as these things don't souce that much current. Beyond that, an electrical connection is an electrical connection - possibly yours was loose and/or intermittent?

Not saying what you experienced is not possible... just trying to understand it

scalbert

I agree, this is an amplified voltage signal in the 0 - 5 VDC range. A little extra resistance may drop the signal some but not significantly without causeing consistant driving issues.

I also agree that this was probably more of an intermitant connection issue. I had an issue with the ESM connections last fall but they were more dramatic than what was stated.

NSX-Tuner

Sure... although I don't want to mess with it too much... wouldn't want to mess up your day at the twisties... If it ain't broke, don't fix it...

BTW- do you know if the installers soldered the ECU/ESM connections?

Better yet... bring you car into CompTech for that dyno you keep promising and have them look at the ECU/ESM connections.

Chemmech

I just soldered my connections, normally when the car is cold it would sort of lope, now it's very smooth, even after the car warms up. This should be archived .

NSX-Tuner

My gas mileage has definitely improved since having the ECU/ESM connections soldered. For the last two weeks, I've been getting an additional 50-75 miles per tank of gas for my weekly commute.

As I previously stated; even though the behavior regarding the hiccups was intermittent that only happened typically under a certain temp range (75-81 deg.), the previous bad connections were constant; meaning there was always a slight resistance present that caused a lower than normal voltage. According to CompTech, this was causing the ECU to add just a little extra fuel unnecessarily. Under certain driving conditions and within a certain temp. range, this caused the plugs to foul that led to misfires.

In summary (IMHO), I believe that my car was burning extra fuel most of the time with the poor ECU/ESM connections which caused a loss in gas mileage.