hey i just did a dp to mpfi swap on my 89 civic dx with a fresh d16y7, when i start the motor it has a high rpm surge like i tried the idel screw and vacuum lines etc and still have a high rev, i was wondering what causes this to happen. its up around like 2500-3 grand rpm i need to bring it down to like 1 grand, if anyone knows what could be making this happen please let me know so i can fix it thanks.

 

it surges? or it stays that high?
could be an IM leak

 

its stays kinda high, we adjust stuff and it it goes down a lil, i took it off my driveway and put it on flat gound and it went down to reg.. wierd. umm i dont think its a intake manifold leak. even tho i swaped it out i put new gaskets and **** all around , ughh how would i now for sure if it was tho?

 

Maybe bleed coolant, I dont know if that helps sorry.

 

IAVC, MAYBE

 

1) idle screw
2) did you swap the outter wires on the TPS sensor?
3) vacuum leak

 

idel screw calms it down a lil, and yes we swaped the outter wires on the tps sensor and vacuum leak could be still possible.

 

codes?

 

check for cels but i'm 90 percent sure you have a vaccum leak of some sort check all the lines and makes sure everything is were it should be

 

i tried so far my best on the vacuum leaks and also the ecu threw a error code 10 ( iat )

 

IACV

do you have the right t.b.

 

fix codes then diagnose...

 

i have a b18a1 tb on a z6 manifold. also i have a throttle spacer. but i doubt that would make this happen few of my friends have them and their car dont do this.

 

okay do this and tell me if this fixes the problem....

take you air intake off so you can see your t.b. there should be a hole like a air port right before your butterfly put your finger over the hole and tell me if that stopped the surge if so...........put a piece rubber in the hole to block it off my buddie had a similar problem with his Z6



that is what I am talking about put your finger over it and see if that does it,,,


Modified by 4gencivicef9 at 1:25 PM 10/3/2006

 

did that fix the problem.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 4gencivicef9 &raquo;</TD></TR><TR><TD CLASS="quote">okay do this and tell me if this fixes the problem....

take you air intake off so you can see your t.b. there should be a hole like a air port right before your butterfly put your finger over the hole and tell me if that stopped the surge if so...........put a piece rubber in the hole to block it off my buddie had a similar problem with his Z6



that is what I am talking about put your finger over it and see if that does it,,,


Modified by 4gencivicef9 at 1:25 PM 10/3/2006</TD></TR></TABLE>

I definatly had that problem man look in the TB if there is two holes on the side closest to the firewall plug the lower one with your finger, it it goes down and starts sputtering then that the problem. its letting too much air in and the car idles high or surges depending on the ecu, with a obd0 it should stay high but with a obd1 it will surge i think.

 

sorry i was out.. ya i already did that it has alot of vacuum and when i put my finger on it . it stops the surge.. and it was my fitv but now im geting a steady 3k start. and starys thier. i checked the iacv and cleaned it but just might be a bad sensor in the iacv.. so im going to try and get a new one.. but anymore info would help thanks..