i had teh same problem
check iacv, and egr valve sensor.

 

But wouldnt these problems all lead to not enough fuel being delivered?

 

umm im not sure but i know for a fact these sensor all deal with idling issues. try taking off the egr valve cleaning it. and clean the screen of the iacv. put it back and give it a try again. let me know how it went. trust me alot of people told me it was cause i was running too lean. i changed injectors 2 times, change fuel filter and fuel pump. replaced fuel rail and fpr with aem. and it still did it till i figured out my h22 had the accord egr . the accord egr opening was like half an inch smaller than the ludes. once i switched it . it went back to normal.

 

you may be on to something. i did switch the egr valve because the h22 one was broken somehow during shipment. i did not remember to compare the opening. egr valve opening may not be big enough -possible. i am thinking that the diaphram in the fpr is broken- probably the reason behind fuel being dumped into cylinders 3 and 4. vaccum source is sucking in fpr and dumping it down closests cylinders prolly 3 and 4. but im too tired from work today so i will get to it first thing in the morning on saturday.

anyone know how much fuel pressure h22s are suppose to hold? i remember my gauge read something like 40 ish. i cant remember if those fpr are suppose to hold a steady pressure for a given period of time even after you turn off the car or are they suppose to drop back down? with everyone's input we will get to the bottom of this. thanks much.

 

this morning, went out and tried to diagnose the car again. found out fuel pressure regulator is good. diaphram is not broken- i took off vacuum line and no fuel spills out. pressure hold steady around 40ish, used a stethoscope to listen to injectors and all of them buzz the same up an down. there is voltage at injectors, i tested with noid light-light flashes. there IS spark to all cylinders, from cap to plugs. compression is as from 1st to 4th, 245-240-255-250. still NO check engine light. timing is on the mark. i am stumped. i am using stock harness, added iab pink wire to pin a17 and black/yellow to 12 volt source, knock sensor red/blue wire to d3, switch a6 and a11 pins. staying with internal coil because stock EX accord had internal- jdm distributor is internal. still same results. plugs from 3rd and 4th cylinders are cooked black while 1 and 2 are visible with some burn marks and fuel. and exhuast fumes smells shit like fuel-ouch burns my eyes. if i am correct, i am thinking it is the distributor firing wrong. is jdm firing order 1342? can fuel be delivered at wrong time? what controls fuel delivery? but i have tried using stock EX ecu and nothing changes. the only thing that i have yet to tried is find an h22 egr valve to try because i used the accords due to the h22 one was broken. anyone with any ideas?

 

i would say egr problem probability 80 percent. why? cause i compared both and the accord opening is like half the size of the ludes. take it off look at the opening on the intake manifold and look at the opening on the accord egr. see for your self.