Tonight while accelerating from a stop sign, the Si felt like it was loading up/sputtering while trying to accelerate. As it was doing this, I gave it more gas, and it went to 5200-5500 and then acted as if bouncing off the rev limiter, so I let off the gas and the rpms dropped STRAIGHT to 0. Didn't sputter or hover lower rpm, STRAIGHT DOWN TO ZERO as if I turned the key off.

Now to put the honda-tech gurus to work, here is what I did less than 3 minutes before this happened. Got gas... 91 octane and 11.2 gallons (aka it was EMPTY).. and also got a car wash (typical touchless carwash and there was NOT an undercarriage sprayer in the wash bay).

Currently I have the DCRH, DC Catback, AEM Cold Air

I have 2 theories....more like one but before I can go to bed, I need to get the opinion of others.

Theory A) Somehow the CAI sucked up water... I am very doubtful on this feeling, but there can't be too many reasons why this happened...and being I had JUST left a carwash, it has to cross my mind

Theory B) I did something out of habit from owning a SUV in the past. When the gas pump popped the first time from full, I kept going up til the next dollar ($.75 more after the pop, or 1/3 gallon) In the manual for my old rsx-s it said not to do that, but gave no reasoning... Could overfilling your gas tank cause the car to act goofy for 10-15 seconds then die? After it died I just put it into 2nd gear and clutch started it while still rolling and it had no problem firing up and running idling after that. I also went and did a WOT pull on the interstate to see if vtec was still engaging and it ran strong as ever....

Sorry for the book, but could someone that is in 'the know' chime in and put my mind to rest. Car as of now, cold starts fine, idles fine, and only died that one time and only chugged/sputtered that one time.

THANKS


Modified by xlur8ed at 9:13 PM 3/22/2006

 

Any CEL?

 

No

 

Probably just some bad gas going through your injectors.

 

well just FYI...don't pump any gas into your car after the First pop when its done pumping.. my dad is a auto tech. and he said don't do it cuz you can mess something up. the "POP" is a indication that its full and don't add more gas after the "POP"

 

Yeah, you dont want to overfill the tank. It can cause excessive vapors or even fuel to end up in the charcoal canister and then it may be drawn into the engine and may cause a problem, such as overly rich. Also it is against the law(not sure on every state, was told california) because it effects the gas stations vapor recovery system.


Modified by ED7 at 11:59 PM 3/22/2006

 

The same thing happens to my Saturn too. I still cant figure it out.

 

I would try and reset the ecu...remove the battery cable for 5 minutes or so and see if that does anything. I would say if the problem doesn't show up again then it might have been a fluke thing and I wouldn't worry about it until IF it shows up again.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by .ken &raquo;</TD></TR><TR><TD CLASS="quote">I would try and reset the ecu...</TD></TR></TABLE>
How is resetting the ECU going to help? You're erasing the modifications that have been made because of his habits and driving style, and not really helping with whatever the problem was.

 

Its not bad fuel, its not from "topping off your tank". Its a Lack of fuel/electrical problem. Just drop it off and have the dealer fix.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by George Knighton &raquo;</TD></TR><TR><TD CLASS="quote">
How is resetting the ECU going to help? You're erasing the modifications that have been made because of his habits and driving style, and not really helping with whatever the problem was.</TD></TR></TABLE>

I would think, like most vehicles, that after the modifications (performance parts added) the ecu would see the extra air/modifications and that could have possibly fouled something up...just a suggestion, that is unless new ecu's automatically account for intake and adding a header etc.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Honda318dx &raquo;</TD></TR><TR><TD CLASS="quote">Its not bad fuel, its not from "topping off your tank". Its a Lack of fuel/electrical problem. Just drop it off and have the dealer fix.</TD></TR></TABLE>

Are you positive on this? Is it a known issue that I don't know of? I would like to keep my car outta the dealership as often as possible being the modding has begun (and yes I know of the Magnussen act and know avoid voided the warranty...) I just don't need them to raise a stink this early in the car's life....

 

hm.. well even if you did take it to the dealer, they can't fix it if they can't recreate the problem. Is it at all possible you weren't completely in gear at the stop sign and you hit the gas, then maybe it went into gear as you let off and it died? But I suppose then it would have jerked.... hm, strange.

 

How does the car drive now.

 

fine

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by xlur8ed &raquo;</TD></TR><TR><TD CLASS="quote">it went to 5200-5500 and then acted as if bouncing off the rev limiter</TD></TR></TABLE>

This makes me think it might have gone into 'limp' mode where it sences something is wrong and limits the revs (among other things I assume). Although you said there was no CEL, is it possible to be in limp mode with no CEL? I doubt it but just something to think about.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Slow EJ8 &raquo;</TD></TR><TR><TD CLASS="quote">This makes me think it might have gone into 'limp' mode where it sences something is wrong and limits the revs (among other things I assume). Although you said there was no CEL, is it possible to be in limp mode with no CEL? I doubt it but just something to think about. </TD></TR></TABLE>

It may have go into 'limp' mode, but it would have gone into and came out of it within 10 seconds if that.

 

maybe the ECT had a little bug?

 

2006 Civic SI
Compustar Alarm/Autostart
DC Sports Race Header
DC Sports Race Catback
AEM CAI, HID's, Tein S-techs
30% tint


maybe some plugs on the bottom for the sensors came loose or water logged and threw some funky codes

did you ensure these were all tightened back to specs when u installed?

and dont u get a CEL with the race header?

 

only thing you 'unplug' during the DCRH, DC catback is the o2 sensor, which I assure is plugged back in, otherwise I would have a CEL....

And no, you shouldn't recieve a CEL with the race header, if you do, you didn't install it correctly.


I have posted this up a few places, but may have missed here... This nonfouler trick has work for over 1000 miles now.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by xlur8ed &raquo;</TD></TR><TR><TD CLASS="quote">only thing you 'unplug' during the DCRH, DC catback is the o2 sensor, which I assure is plugged back in, otherwise I would have a CEL....

And no, you shouldn't recieve a CEL with the race header, if you do, you didn't install it correctly.


I have posted this up a few places, but may have missed here... This nonfouler trick has work for over 1000 miles now.</TD></TR></TABLE>


maybe the non fouler method caused it to not get sufficient readings for the ecu
and "go into limp mode"

this is all just guessing

 

I have experienced the same conditions with my car (not my Si, but a DOHC Sol) after over-filling my gas tank. I would venture to say that this could be your problem.

Obviously, if the problem happens again, without having just filled up, then it is not the case. If it never happens again and you want to be sure that overfilling is the cause, just over-fill your tank and you will know depending on what happens.

Keep up updated. Thanks.

 

thanks for all the info guys. It hasn't happened again, and until it does, I am gonna let it go.... I have talked with numerous peeps, and I am comfortable with the theory of overfilling the tank.

 

same symptoms occured to me on my si at the race track. after looking under the hood i found a small opening from the intake mani and the rubber piece from my aem cai. just pushed it in all the way and tightened it. i guess it came loose from launching the car. check the seal on the cold air. and no i didn't throw a code either but the symptoms were exactly the same.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by xlur8ed &raquo;</TD></TR><TR><TD CLASS="quote">thanks for all the info guys. It hasn't happened again, and until it does, I am gonna let it go.... I have talked with numerous peeps, and I am comfortable with the theory of overfilling the tank. </TD></TR></TABLE> Yep, this is the best reason as of now, because it can happen.