I previously posted this in 5th Gen but i think it should be here.


**1st post**
I got this car back in October, it drove great until December. I started having problems with high idle, within the week it went from a high idle to a fluctuating idle (800-2000rpm). That weekend i checked the codes and all it said was a misfire cylinder #1, i replaced the wires, plugs, rotor and cap, and #1 injector. The problem did not go away, then is started throwing the IACV code. I cleaned the IACV, didnt help so i replaced it.

--Even with a brand new Denso IACV(same as i took off the car) it is still throwing the IACV code and having the fluctuating idle.

~Is there anything special i needed to do when replacing?

--With the new plugs, wires, cap and rotor,fuel filter, injector in #1 - I am still haveing the misfire problem, i have done a compression check and all cylinders are at 170.
~ Could the IACV problem be fooling the computer to thinking its a misfire?
~ Can the misfire be causing the IACV problem?

~ Maybe the valves sticking?

~Maybe the distributor?

Im kinda lost at this point!





** second post **
Ok, bear with me im learning more and more abotu this car everyday.
I has a '00 ECU and Intake Manofold but a D15B block with vTec, so im thinking ill repost in 6th Gen since the problems seem to be coming from the parts off the '00

Year - 2000
model - Civic
trim - ? all power with sunroof
#doors - 2
engine - D15B - Previous owner swaped. Still has '00 ECU/Intake
trans - Manual



code numbers - 14/ 71/ 72/ 73/ 74

Have you checked the TPS yet?
It is one of those known causes for the symptoms you have..

i have not.

i was thinking TPS but with the money already put into it I needed a second opinion, its not throwing a TPS code its throwing IACV code.?.?

Looks like ill be cutting that damn thing off this weekend

at least its only $40