Ok I read all 2 million searched threads relating to this and tried all that applied to my application.

My application is a 2000 si b16a2 into a 93 civic with a chipped ECU.

The car ran fine before removing motor to do a rhd swap.

The timing is right.

The IACV is clean

No CELS

No vac leaks

not the throttle cable

Throttle body is clean

Have no FITV

Coolant system bled.

New gaskets

Tried all the suggested adjustments to get nowhere.

Compression is fine.

What did I miss?


Modified by E.Honda at 3:59 AM 1/25/2006

 

ecu bad?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by teamvirus &raquo;</TD></TR><TR><TD CLASS="quote">ecu bad?</TD></TR></TABLE>

No...it was running fine b4 the swap....Doubtful.

 

you got a chiped ecu, Hmmm, which chip are you using, or do you have a custom chip? cant expect much from the egay chips. i had simillar problems, was the chip. good luck, its the ***** havin this problem.

 

I ordered it chipped..What the hell else could it be?

 

tps map

 

vacuum leak somewhere maybe. How high is the idle when it fluctuates?

 

Well I got no CELS....I unplug em and I get CELS.
I did reset the ecu and started it back up and it was not wandering no where near as much but now it is choppy a bit. I will ret again tomorrow.

 

Ok I think resetting the ecu did the trick......It seems to run ok now with the exception of it dies if I tap the throttle....Would seem to me that this is in the adjustment.

Thanks

E.Honda

 

Well damn it I thought I had it wooped.......
Still got the surge.
I thought it had stopped but nope.
I have double check everything I can think of.
I did notice one of the injectors had a dif color marking on it.
3 of them have what looks to be white and one had blue on it.
Does anyone know the color coding?
I have a b16a....what color should be on the injectors?

Thanks
E.Honda

 

ok tried a dif iacv today and still does it.

Bump for answer on the injectors??

 

From what it looks like, you know your stuff, but check the actual wiring to the various sensors. I have never done a RHD swap, but it seems as if there is a great deal of wiring to be done, therefore it may be a "short," for lack of a better description.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Spinnbait &raquo;</TD></TR><TR><TD CLASS="quote">From what it looks like, you know your stuff, but check the actual wiring to the various sensors. I have never done a RHD swap, but it seems as if there is a great deal of wiring to be done, therefore it may be a "short," for lack of a better description.</TD></TR></TABLE>

Well I got to looking at the wiring and found that the D3 wire from the ecu is not hooked up to anything.
Can someone comfirm the knock sensor has only 1 wire going to it and if at all possible toss up a pic of the sensor on the block.

I was under the impression that if you chipped the ecu that this swap did not require a knock sensor.

I don't really see the knock sensor making the idle fluctuate unless it's getting false readings...But again no cels.

Thank you

 

D3 is knock sensor. I would think that it should be hooked up regardless of the chip. Check A9 as well.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Spinnbait &raquo;</TD></TR><TR><TD CLASS="quote">D3 is knock sensor. I would think that it should be hooked up regardless of the chip. Check A9 as well.</TD></TR></TABLE>

I am at home now and don't have my manual what is A9?

 

IACV.

 

Bump 4 more responses.

 

I have the same problem it seems so common in these cars, my friends sister has a stock civic and hers does it... It personally doesnt bother me but if there is a solution im up for it

Bump 4 u

 

Well is there nothing other than what I posted going to fix it?

I mean if I have tried EVERYHTING it could be then .........THEN WHAT?
It's gotta be something.

Thank you

E.Honda

 

Im sure you haven't tried EVERYTHING...

Did you check your coolant level? If your coolant has air in the system, the idle with surge as well... try topping that off and bleeding it.

Did you check for a vaccum leak between the throttle body and the intake manifold? How about the intake manifold and the head? A bad gasket can cause this too.

I actually fixed mine by doing the coolant thing, and re-adjusting the idle screw on the throttle body. I have also had this happen due to a bad TPS sensor.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by JDM_Ej &raquo;</TD></TR><TR><TD CLASS="quote">Im sure you haven't tried EVERYTHING...

Did you check your coolant level? If your coolant has air in the system, the idle with surge as well... try topping that off and bleeding it.

Did you check for a vaccum leak between the throttle body and the intake manifold? How about the intake manifold and the head? A bad gasket can cause this too.

I actually fixed mine by doing the coolant thing, and re-adjusting the idle screw on the throttle body. I have also had this happen due to a bad TPS sensor.</TD></TR></TABLE>

Yep did the coolant thing. No vac leaks.....Guess I can change the throttle body and try the TPS. I also hooked up the knock sensor...Still got the issue.

E.Honda

 

bump cuz i got the same problem

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 97spooncivic &raquo;</TD></TR><TR><TD CLASS="quote">bump cuz i got the same problem</TD></TR></TABLE>

 

How bad is it fluctuating? I had a surging problem a few years ago that drove me nuts. I would get the code for the IACV. I replaced it, but it didn't fix the problem. Turns out that the charcoal cannister was bad. I put a rubber cap on the line going from the throttle body to the cannister and never had that problem again.

 

Before I sold my Jetta, the charcoal canister set off the check engine light, but didn't effect the driving any.

I know this is a Honda Civic thread but on my ford probe has been having same problem, if you consider the fact it has a mazda engine (as do the ford probes) it's not too far off - when I drive it and push in the clutch it idles at jumps and idles are like 2-3k RPMS, then drops and usually stalls...the wires of hte O2 sensor were melted together, and I replaced the plug, it worked fine for like 2 weeks, then it started it's **** again after filling up the gas tank...I've adjusted the throttle too many times, it's not that, the hell else can it be? Not sustaining idle (at 900), when you're driving it sometimes the RPMs don't drop until like 2 - 5 seconds later, it sounds like an O2 sensor !!!!!

Alas, it is not, if somebody has any info on it please e-mail me (gfotiades@hvc.rr.com) or use the IM function on hondatech -- sorry to be mixing cars, but it seems to be the same damn problem and I just don't get it...