greenman94

Hey guys,

I just recently bought a 98 civic hatch, 5 speed, with a d16y7 with a massive rod knock. So I went and picked myself up a d16y7 with a d16y8 head and intake and a ex tranny.

Something is very wrong though!! I got the new tranny and motor in, everything wired in, and I did the 2 wire iacv conversion. The only thing I haven't done yet is put in the new p2p ecu and wire in vetc.

I got everything in and started the engine, and it runs like crap! It just struggles to idle and surges like crazy. Once you even touch the throttle, it dies. I've check for spark, its all good. I have the car timed right and everything. I did a compression check and each cylinder was near 180, give or take a few lbs. all the vacuum lines are in and so are my sensors. I also have plenty of fuel!

What is wrong with this thing?! I can't figure it out! Thanks.

uindaway

of course its gonna run like crap if your not using the right ecu....

B_Swapped93

^That would not cause what he is describing....for the crap idle have you checked you TC tension and idle screw/rotor screw. Cleaned you'r IACV right. getting any codes ?

greenman94

I haven't scanned the car yet, that is next on the list. Even is my idle screw was off, wouldn't it stay running when I revved it up? Sorry, this is my first swap, but what is tc tension? I cleaned my iacv, I even tired using a different one.

B_Swapped93

i don't know the stock d series TB's that well. but here is a pic: number one is the idle screw number 2 is where(be hind that mount point) the rotor/pully screw is. worry more about the rotor screw then the other one.
as for TC=throttle cable

greenman94

So the throttle body is what is causing my car to not run? I've checked about everything that is possible on the car, except for the throttle body, lol.

B_Swapped93

It's worth a check as it controles the idle chartoristics so to say. if you have a 2nd one give it a try.

94EG8

You wont have a working IACV until you swap the ECU.

greenman94

Alright, as soon as the new ecu comes in the mail I will give that a try. I will take a look at the TB too. Thanks guys for the help! Hopefully I can get this worked out!

So if I don't have the ecu swapped, my iacv will not work, and that is enough to screw with how it runs? Shouldn't it be running better than what it is?!

B_Swapped93

It should help doesn't mean it will solve it.

94EG8

There's probably more wrong with it than the IACV, but that is part of your problem. If it dies as soon as you try to give it gas there's a good chance the MAP and TPS connectors are switched.

Mr. Dabolina

Did you get the Y8 intake mani with the air injection holes on the bottom of the runners?

greenman94

Ok, could I screw up anything if I try switching the map and tps?

greenman94

No, my intake doesn't have that, isn't that cold start assist or something like that?

94EG8

No, it just wont run right.

Mr. Dabolina

Ya its a controlled vacuum leak that can make a car run shiesty if its not designed for it.

Im agreeing with a switched MAP and TPS.

If you can get it on a scanner and read whatever codes its throwing it can make diagnosing it 10000x easier.

B_Swapped93

you're thinking of the FITV that shouldn't cause you'r car to fall flat on it's face tho.

Mr. Dabolina

Y7s dont have a FITV. The 99-00s have a FIACV to assist in cold starting.

B_Swapped93

ok just went out and looked at my 99 DX you'r right my bad

greenman94

Alright thanks for all the help. My new ecu should be here in a couple days and I will swap that and the sensors around and go from there.

greenman94

Alright, I finally got my new ecu today! Got it plugged in, the car definitely runs better, but still isn't close to being right! I also had a chance to scan the car and these are the codes that came up:
P0108
P0122
P0113 - I forgot to plug this one in! Oops.
P1508
P1259 - still have to hook vtec up!
P0141 - I am missing the plug for the 2nd o2 sensor and I'm workin on getting that, so that's probably explains that.

But the remaining codes, I'm not sure how to solve them! I had the map and tps switched, but I switched them before I scanned it.

Also, how do I know which connector is for the 1st o2 sensor and which one is for the 2nd?

Thanks for all of the help.

greenman94

Bump

B_Swapped93

p108 is map try a new/different one
here a list of obd2 codes you can sift threw it for the code for peimary o2 and sceonday o2 http://www.clubcivic.com/board/showthread.php?t=63326

greenman94

Hey guys.

Got my iacv problem fixed and I replaced the map sensor. The car runs and idles way better, but it still bogs down and chokes itself out when you even touch the throttle.

I was spraying a little carb cleaner around the intake and tb and I noticed the tb has a leak. Could that be a huge part of this whole problem? Lol

94gt302

Yes. Any vacuum leak will cause an issue. Its best that you clear your codes and re-scan the vehicle after you replaced the map. If you swapped the plugs and it threw a code for map, the plugs were probably hooked up correctly from the start.

Buy, yes replace the TB gasket, or manifold gasket, whichever is leaking or both. Its possible that the TB itself is leaking, so double check.