alexg103

hey guys i have a 95 civic hatch with a d15b7 bottom end and a z6 head did the swap everything ran perfect but i was still using the stock ecu "non vtec" tell i just put in my auto p28. and i used my stock d15 intake mani i just changed out the mani for the z6 one but it has one less coolent nipple than my d15 one circled in red. so i just T'd the hose comming from the tb into the other hose showen in blue. that hose runs around back down by the water neck.

http://i383.photobucket.com/albums/o...3/manifold.jpg

so my problem now is my idle is jumping as if my iac were bad i replace with with two differnt ones and still doing the same thing.

and this is my other problem i can unplug the ian and my car will idle perfectly. but if i give it a little gas and try to hold it at 1500 it will bounce from 1500 to 1800 pretty fast witch if i try to take off slow makes my car jerk like a mother!

question 1: is this jumping when the iac is plugged cuz i changed the ecu? or the hoses?
any ideas to fix this?

and the 2nd: any reason why when teh iac is unplugged i get the small jump from 1500 to 1800

alexg103

well so lets see here if i have the iac unplugged the idle jumps from 900 to 2k or whatever as if it were bad but if i unplug it it idles perftect.

but if i have it unplugged and try to hld the rpms at 1500 it jumps to 1800 and back down really fast so it makes it so i can not driver down the road really slow with out my car jumping and ideas? could this be the ecu? or just that i dont really got the coolant hoses excatly right

Anon51

that upper hose goes to a heater pipe next to the head. above the upper radiator hose. if i'm picturing it right in my head.

alexg103

that upper hose that runs from that upper nipple that i T'd off of runs to the back righton the water neck....

i could not stand anymore trying to take of slowly from a stop sing or drive decently through a complex with my car jumping so i had to plug the iac back in and deal with the jumping idle at stop lights