Hey guys like the title says i have a 98 civic hatchback cx i installed a civic ex d16y8 intake manifold. ok i installed the iacv i conneceted the new style plug wich is the round one i left off the orange wire. i put in the ex throtle body but the check engine light is on. and the car has like a spudder to it when u come out of first and second. i swapped the throtle body and put the cx throtle body wich has the iacv on the throtle body itself i connected the orange wire back with the old style plug but now i have no check engine light but the car idles up and down up and down. i checked for vacume leaks none at all. any help would be good i have been trying to fix this for weeks allready. this is my causins car.

 

its could be one of your idle air control sensors located near the tb/intake manifold.

 

anybody else im in need to fix this car. i have a turbo kit im waiting to install. but alls i need is to fix this problem.

 

how did you check for vaccum leaks? what rpm range?

i had left a piece of the TB gasket between the TB and IM flange and spent days hunting for answers.

best of luck

 

I sprayed throtle cleaner on the intake manifold/ vacume lines to see if the engine like dies the only time it did that was my the img i replaced that gasket. but still cars not running right. i fix cars for a living. but i cant fix this one lol.

 

40 views and hardly any response help please in need to get running

 

-did you cover/fill/close the cruise control nipple on the bottom left of the manifold?

-use a new throttle body gasket?

-check the tension of the throttle cable so the throttle plate is closed?

-make sure all bolts are tight?

- after all this is checked ..reset the ecu and when you start the car run the heat full blast for a few mins to get all the air bubbles out of the coolant lines

 

Does your idle flucate or just sputters? What year y8 manifold did you use? Also what ecu are you using? Did you ever reset the ecu?

 

i reset the ecu and i have the cx ecu on it. with the cx throtle body.

 

Damn I'm looking for answers for a friend who did this also. I'll need to see what tb they are using. But he has a cx and put a ex manifold on it also. The damn car sounds like it has a cam in it, idles up and down, up and down, ect.