i replaced the motor in my girls car the other day with a 92 cx motor since hers was a dx with a cracked block and she only needs it to get from work and home...

ive tried everything to get a constant idle besides replacing sensors... i just used the ones off my motor ( d16z6 )

i unplugged the iac valve and it didnt do anything i took all the vacume lines off and sealed them still didnt help.

i tried swapping ecus went from a p06 to p05... that didnt do ****...
then i went from the p05 to my jdm p30 and it stopped fluctuating.. the only bad thing is that it idled at 1100..

but she cant keep my ecu and its pissing me off... does anybody know what it could be.. any help would be appreciated thanks in advance

 

give this a try. https://honda-tech.com/zerothread?id=1003988

 

bump

i did all of that it still does it... when its cold and when its warm... ive switched the iacv with mine switched the throttlebody with mine and it still does it.

 

i bet is a vacum leak somewhere, just give it a quick check

 

ur not gettin any cels? check for vacum leaks, make sure u adjust the fitv, clean out the iacv, and ur tps is calibrated properly.