Erratic RPM when Cold

[antonypalma21]

I need help with this... i cleaned the iac
and idle valve with carburetor cleaner
it help a little bit but the problem persist...
the book tells me to look for so much... anyone has solve this proble... thank you

[af_1132]

I have the same issue when the car is warm. I know how frustrating it can be to find the source, just be persistent.

Since yours is happening while the car is cold before cleaned the IACV and FITV, you need to do all the vacuum leak checks and let us know if you have any CEL codes for the MAP, TPS, or IACV. Check for vacuum hoses that have holes or rips, or have come off, check all the little rubber gaskets for all the IM valves, and check all gaskets involved in the TB and IM.

A good way to attack this is going through the steps in this thread in order. The FITV is usually the culprit, but not always.

[deevergote]

You'll also want to properly reset your base idle. The instructions for that can be found in the thread that is marked "READ HERE FIRST" at the top of this section.

[preludeNinja]

I wouldnt just trust cleaning the IAC either cause I have had a few hondas that did this and the problem stopped when I replaced the valve.

[antonypalma21]

Cb7 in process

Thanks... no i do not have any cel codes thats the problem... i will defenetly try the "read here first" thread

[deevergote]

Idle issues are rarely accompanied by CEL codes.

[preludeNinja]

Idle issues are rarely accompanied by CEL codes.

So true. So many little vacuum leaks can cause this too thats why it is so frustrating.

[irelandmc]

You checked that the cooling system was topped off and purged right?

[antonypalma21]

Yes i did purged the antifreeze... i allready cleaned the
EGR changed the Gasket... problem persist... the ex comes with "Bypass" modular i think it is i got check it... right next to the battery... is that what that thread says "Air boost Valve"

[Skeazzy]

Yes i did purged the antifreeze... i allready cleaned the
EGR changed the Gasket... problem persist... the ex comes with "Bypass" modular i think it is i got check it... right next to the battery... is that what that thread says "Air boost Valve"

Why don't you try changing the o2 sensor. You can find them online for relatively cheap.. stay away from bosch because there's been nothing but bad reviews about them.
Skeazzy

[rustyaccord]

The O2 sensor has nothing to do with an erratic idle.

[lbus9168]

Skeazzy, an o2 sensor is a great thing to replace.

but it has nothing to do with the issue.

As has been stated, if cleaning the FITV, IACV, etc doesnt work, and you dont have any vacuum leaks, then the valve itself may just be broken and requires replacement. start with replacing the IACV first.

also, once you clean everything, reset your ecu. you can either pull the ecu fuse for 15 seconds or disconnect the battery.

Just note that ive found most vehicles with automatic transmissions act weird when you reset the Car and ecu for about 500KM's, as the auto relearns driving behaviour.

[antonypalma21]

Cb7 in process

I allready changed the IAC... i have 2, 93 accords the 1 in project is my Ex... problem Persists....

[*bruno*]

What is your behavior idle RPM ? May be it's just a little too low ...

[BakedLikeBread]

I need help with this... i cleaned the iac
and idle valve with carburetor cleaner
it help a little bit but the problem persist...
the book tells me to look for so much... anyone has solve this proble... thank you

I'm having this issue as well, I haven't actually began trying to diagnose what the problem is because I'm checking out the other codes I had previously; however as stated below your post, this also happens to me while the car is warm.

I have the same issue when the car is warm. I know how frustrating it can be to find the source, just be persistent.

Since yours is happening while the car is cold before cleaned the IACV and FITV, you need to do all the vacuum leak checks and let us know if you have any CEL codes for the MAP, TPS, or IACV. Check for vacuum hoses that have holes or rips, or have come off, check all the little rubber gaskets for all the IM valves, and check all gaskets involved in the TB and IM.

A good way to attack this is going through the steps in this thread in order. The FITV is usually the culprit, but not always.

Great help here, I'll have a look at it as well; unfortunately I'm rather new here and all these "short terms'' are unknown by me.

I know there was a topic somewhere that defined forum slangs and terms and what not, but it's nowhere to be found.

If someone would happen to know where it's located off the top of their head, mind leaving the link?

Skeazzy, an o2 sensor is a great thing to replace.

but it has nothing to do with the issue.

As has been stated, if cleaning the FITV, IACV, etc doesnt work, and you dont have any vacuum leaks, then the valve itself may just be broken and requires replacement. start with replacing the IACV first.

also, once you clean everything, reset your ecu. you can either pull the ecu fuse for 15 seconds or disconnect the battery.

Just note that ive found most vehicles with automatic transmissions act weird when you reset the Car and ecu for about 500KM's, as the auto relearns driving behaviour.

I wish I would've know that resetting the car would make it act up. I replaced the battery and now it's acting crazy af bro.

I was almost done replacing and repairing all of the issues that I found, and now that I've replaced the battery like four more issues pop up. What kind of mess is this.