Just swapped a d15b into my ek hatch. Motor starts up fine but idles sparatically. It does really jump up and down but it is definatley not stable. Then when I try and drive it bogs really bad below 3000 rpms. After 3000 rpm it runs like a champ. If I am any gear and the rpms are below 3000 the car bogs like its not getting fuel then once it goes over 3000 its fine again.There is no cel and we replaced the iat sensor and changed the iavc. Still the same thing. Need some help on what could be the cause of this. This is a pain in the *** to drive at every stop light I have to rev to like 3000 just so I wont boog out.

 

the exact same thing is happening with my d15B, so bump for a resolution, i personally think its my dizzy.

 

check dizzy, timing and tps

 

check fuel filter/fuel injectors/spark plug & wires and last not least cap & rotor....could also be your timing is off...........hope this helps

 

its probably your tps

 

bring it back, if you didnt swap out the intake manifold and kept the jdm one, you are missing the egr valve. this causes that and asurd gas mileage. also, check that yor pugs behind the intake manifold arent muxed up, there is three identical ones.

 

i had this happen with the LS swap in my crx. changed everything from brand new dizzy to ecu to fuel filter to everywhere. end up selling the car cuz it pissed me the hell off