alright, when i unplugged the IACV it stated to make like heart beating noise, my idle was a 1500 rpm, while it was doing this the needle was moving a little, probably like in between the 1500 line and the 1600 line, maybe not even that much, but as i adjusted the idle screw it wouldn't go right at all, so as i turned it to the left the noise got louder( the heart started beating more) <thats the best way i can describe it.. so i turned it back to where it was when i started, plugged the iacv plug back in but now its doing the heart beating thing not very very bad but its doing it, I reset my ecu, and it stopped but the idle is stil 1500. After the car gets warmed up it doesn't stay at 1500 it will go to about 2000 then fall down to 1000 then back to 2000 then it will go to about 1500 and bobble between 1400 and 1700 and then it goes back to going from 1000 to 2000 again and it just continues to do that. Also my CEL is on throwing 9 code CYP: Cylinder Position Sensor, its inside the distributor, so i bought a brand new distributor from honda, well that didnt fix a thing. Im still getting the code for CYP sensor, and the idle is still crazy. and suggestions
Last edited by Frisbie217 : 02-25-2008 at 10:28 AM.
Reason: Info Change
also i have check the suction on that one valve, there is very minimal suction, there is some but not alot at all defiantly alot less that from the IACV one, I have also cleaned the IACV screen, it was dirty when i took it off but I cleaned it and still nothing has changed
alright, when i unplugged the IACV it stated to make like heart beating noise, my idle was a 1500 rpm, while it was doing this the needle was moving a little, probably like in between the 1500 line and the 1600 line, maybe not even that much, but as i adjusted the idle screw it wouldn't go right at all, so as i turned it to the left the noise got louder( the heart started beating more) <thats the best way i can describe it.. so i turned it back to where it was when i started, plugged the iacv plug back in but now its doing the heart beating thing not very very bad but its doing it, I reset my ecu, and it stopped but the idle is stil 1500. After the car gets warmed up it doesn't stay at 1500 it will go to about 2000 then fall down to 1000 then back to 2000 then it will go to about 1500 and bobble between 1400 and 1700 and then it goes back to going from 1000 to 2000 again and it just continues to do that. Also my CEL is on throwing 9 code CYP: Cylinder Position Sensor, its inside the distributor, so i bought a brand new distributor from honda, well that didnt fix a thing. Im still getting the code for CYP sensor, and the idle is still crazy. and suggestions
Sounds like a timing issue... the very first thing you should've done before buying a new distributor is check the timing. Get a timing light and check to make sure the timing is right. Then this procedure does not work if you have CELs! (as stated at the beginning), must get rid of that problem first.
Ok, I'm a newbie here. This seems like an incredible write up. Thank you kindly. I have been searching other forums and this is the first one that has touched on this in this amount of detail. So major kudos to you, sir!
I have a particular issue that has been going on with my 1993 Honda Civic DX for over a month now. Forgive the length of this post, but I want to be as accurate as possible.
My radiator had a crack in it and prior to being able to replace it, when the coolant level got low the idle of the car would rev up and down anytime the car was simply idling. I have a 5 speed manual transmission and anytime I would be in neutral or just have the clutch engaged for any amount of time the engine would rev up and down. I don't have a tach, but I am assuming it jumps up and down about 500-1000 rpms. Before replacing the radiator, I could simply add more coolant and the issue would go away. After a few times of this, even adding the coolant would not get rid of the revving up and down at idle. I did change the radiator, and bled the system with the bleeder screw, but the issue still remains. I have changed many parts on my car to try and fix this, but nothing has worked. I simply was following other advice from other forums. To date I have changed, other than the radiator, the thermostat, the fuel filter, the IACV, complete tuneup including wires, plugs, distributor cap, and PCV valve. I have also sprayed Starter Fluid on the vac lines and intake manifold to search for vac leaks, but the engine has responded the same. To be clear, when I sprayed looking for these leaks, I allowed the car to warm up to normal operating temp and simply sprayed the lines etc looking for the engine to rev differently. None of this has fixed the issue. Also of note, now when I crank my car up on cold mornings, it emits blue smoke. I have seen this before, but the other morning it was so thick I couldn't see past the blue smoke in my rear view mirror. I know blue smoke means oil is burning, but wanted to add this in just in case it might be tied into this idling issue.
Do you think my FITV could be the problem here? I am going to follow your steps to check, but wanted to post this in the hopes you or someone else might be able to shed any additional light on my particular issue. I did a search to see if I could buy a FITV for my car, but none of the sites seem to list a FITV for my 1993 Honda Civic. My particular engine is a 1.5L FI SOHC 16 valve. It has close to 178,000 miles on it and up until now has been relatively issue free. I love this car, but can't afford to take it to the dealer. Especially now knowing how much MORE they charge to work on your car. They quoted me $400 for the radiator replacement. I did it on my own, and including the rad, both new hoses, and coolant it cost me $118.
Thanks in advance for any help given. It's greatly appreciated.
Cautela- You are the deal! I just went out and followed your steps. Once my car got up to normal operating temp, I placed my finger over the hole for the FITV. There was a lot of suction. I kept my finger there just to see what would happen, and the car started idling perfectly. I even did a small dance out there. I have been hearing this high pitched suction noise ever since this problem arose, but everyone I spoke with said that was normal. It most certainly is NOT normal. I haven't had the chance to fix it yet as I am letting it cool down per your instructions. But I just wanted to say Thank you! You sir, are a life saver where this is concerned. I can't thank you enough.
ey man real nice wirte up help answer sum questions for me. but i was wondering how would u fix the idle surges if it happend on a 97 d16y8 motor?
help me out man
Great write up! I am having this same idle problem, once warmed up sitting in neutral just keeps going up and down. Drives ok. Its a 97 DX 5 speed. Doesn't have any CEL. I just got this car, have had a few accords but this is my first civic. As i understand it this year doesn't have a FITV right? When I unplug the IACV it idles down nice and throws up a CEL. Checked the 2 holes in the intake, one has very little suction but the other has a LOT. When i plug the one with a lot idle goes down and settles out. Giving that when I unplug the IACV it settles down does that mean that it is oK? Since i dont have the FITV what could it be? I did bleed the coolant and got some air out but that didn't seem to help.
i need help i have a built engine in my car and just recently my car started having idleing problems it bounces from 2000 to 700 and keeps doing it i have no idea what it could be PLEASE HELP
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any heko would be nice
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