We swapped in a b16a2 out of a 2000 civic si into my boys 97 cx this weekend. I did all the wiring, and we only have one CEL, for the secondary o2 sensor which is not hooked up yet, but will be within the next 2 days.

We put about 120 miles on the car, and it was running awesome, idling fine. Than, it started to idle around 1200 and surge up to 1800. When you apply the throttle, it bucks alot and feels like it isnt getting any fuel.The only CEL we got is 65 which is for the secondary o2. If you keep the car revving at a stop, and don't let it idle it drives fine.

My first thought was the IACV. But I don't think that would affect the driving, just the idle. It was raining and cold here tonight, so I will have to wait until day light to look things over.

What should I check for? Could this be a vacuum problem? Could it be the IACV? The only sensor that isnt hooked up is the secondary o2. Could that be causing this?

Any help and ideas would be greatly appreciated.

 

anybody know?

 

hrm...
check to see if there's any loose wiring on your 2nd 02. Funny thing is, you shouldn't have to wire in a 2nd 02 in any US EK, all models have two 02 sensors + the wiring for it embedded in the wire harness.

What engine harness did you end up using in this swap ?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Katman &raquo;</TD></TR><TR><TD CLASS="quote">hrm...
check to see if there's any loose wiring on your 2nd 02. Funny thing is, you shouldn't have to wire in a 2nd 02 in any US EK, all models have two 02 sensors + the wiring for it embedded in the wire harness.

What engine harness did you end up using in this swap ?</TD></TR></TABLE>

97 cx harness mated with the 00 si harness. The cx has the 2nd o2 in the front of the motor so it won't reach the second o2. The 2nd o2 isnt hooked up yet though, not until later this week.

 

Maybe IM gasket? I don't know, I had a similar problem and it was the IM gasket.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 743 &raquo;</TD></TR><TR><TD CLASS="quote">

97 cx harness mated with the 00 si harness. The cx has the 2nd o2 in the front of the motor so it won't reach the second o2. The 2nd o2 isnt hooked up yet though, not until later this week.</TD></TR></TABLE>

wtheck!?

So, you used a 00 Si coupe engine harness in a 97 CX civic eh?
I'm assuming you had some wiring fun, as in wiring in ecu plug B.

Well, sounds like a unique wiring setup if thats what happened. All i can suggest now is to install a 2nd 02 and see what happens.

Have you tried resetting the ecu ?

 

So if the o2 sensor doesn't straighten out the problem what do you recommend? Ex wiring harness?

 

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

wtheck!?

So, you used a 00 Si coupe engine harness in a 97 CX civic eh?
I'm assuming you had some wiring fun, as in wiring in ecu plug B.

Well, sounds like a unique wiring setup if thats what happened. All i can suggest now is to install a 2nd 02 and see what happens.

Have you tried resetting the ecu ?</TD></TR></TABLE>


HAHA. . .that's not what I did. I used the cx harness, but took the wires and plugs I needed from the SI harness and pinned them into the plugs.

Someone PM'ed me and suggested ground wire. The speedo and tach was going crazy, and the car was bogging out BIGTIME, shooting white flames and it turned itself off and the oil light came on. Turns out the ground on the thermostat housing was loose. We'll go over all the other grounds later tonight and see what that does.

 

anybody?

 

check your timing
check rotor and cap
double check your wiring
check compresion

do all these before you ask questions. but i'm sure its the 02 doing all this. plug it in plug it in

 

Still won't idle right or drive right and the secondary o2 sensor is hooked up, any ideas? The only CEL we have is a 91 which we can't do anything about. The engine is completely stock. It ran perfect in the Si and we didn't touch anything that would change that during the swap. We also checked the TPS voltage and it read fine.

 

check vaccum leaks. did u break any sensors while u were swapping? are u using the SI ECU?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by JDMlifestyle &raquo;</TD></TR><TR><TD CLASS="quote">check vaccum leaks. did u break any sensors while u were swapping? are u using the SI ECU?</TD></TR></TABLE>

no vacuum leaks, all sensors are intact, only code is 91 for the fuel tank sensor. We are using the SI ecu with an obd2a-b jumper made by Katman.

 

bump for Sunday

 

Help, I need to get to class.

 

UPDATE: took off IACV, was pretty filthy, and there was pieces of leaves on the screen, cleaned it out. Checked all connections, checked for vacuum leaks. Car still bogs. If on the highway in 5th gear, above 70mph it is fine. If it is below that speed, it bogs.

 

bump for help, this car is a daily driver. Needs to go 100+ miles a day. Help us!

 

My GSR swap was doing this when the fast idle control valve went bad.

I don't know if your engine has one or not.

 

The ecu threw a code 14 cel, so last weekend colin and i took off the iacv and gave it a good bath in brakleen. We started it up and it ran perfect for about a day. It even eliminated the code 91 cel for that day, no engine light. The day after we cleaned it we got the code 91 back (expected). It ran fine for about 2-3 days and then it started lightly bogging at lower rpm's at quarter throttle or less, but it was still driveable if i kept it around 4k rpm or if i had half to full throttle on. It ran like that for a day and today it started falling on its face again on my way to class. When i got to class i checked the code in the parking lot and got the code 14 again along with the 91. It also idled properly up until today when it started idleing irratically. I'm assuming that I need a new iacv but any help is appreciated.

 

my hatch does the same thing kinda at low rpms 0-2600 or so and if given too much throttle in that range it boggs/bucks like a lack of fuel or spark.. i dont know. i adjusted the timing and it went away for 2 months and now its back im going to replace the rotor and cap next.

other odd thing is when i drive below 2k and light on the gas, after 1 min like that the CEL comes on and if i change gears or speed ect. the CEL goes away and doesnt stay in the computer (90 civic si btw) doesnt little **** like that **** ya off

 

you can't begin to imagine how much this **** pisses me off. I need to be able to get to class, its my last term andf I live an hour from school. I didn't expect to be running into problems like this, I would of waited till spring when I get out of school to do the swap if I had known it was gonna be a *****. I also didn't expect stuff like this to go bad because it is a completely stock swap, I tried not to leave any room for error. Anyway it ran like complete **** on the way home from my class today, wouldent idle under 1,500 or smoothly. It also bogged and hesitated a lot. I stopped at a parking lot and unplugged the iacv and the idle dropped to 900-700 and idled smoothly, as soon as I plugged it back in it idled like crap. All of the bogging and hesitating are a package deal with the messed up idle. If its idleing good it runs good, if its idleing bad it runs bad. Now the only question is if I can use a iacv from any b-series engine or if I have to spend 85 dollars on a new one...

 

i have one on my b16 from a d16a6 so i think most are the same

thats a diff car tho . the hatch has the stock d16a6 and its messed up my crx with teh b16 and d16a6 IAC is fine.

 

hmm...thanks for the info.

 

What ecu are you guys running?

Also.....did you perform the rewiring for the IACV?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by spektrum &raquo;</TD></TR><TR><TD CLASS="quote">What ecu are you guys running?

Also.....did you perform the rewiring for the IACV?</TD></TR></TABLE>

running the P2T with an obd2a-b jumper made by katman. Did the IACV fix. It's actually throwing a code 14 rite now for the IACV. All connections on the iacv side are soldered and covered, and properly pinned on the other side.