2000 Civic SiR low, rough idle

[TeGGeR®]

I checked for Vac leaks... I didn't notice any cracks.. but I am not really sure how to really check for a vac leak.

I hunt them with a stethoscope with a slender tube for a probe.

You can also use a propane torch (unlit). Hold it near the suspected leak then turn the gas on. Idle will change.

 

[Jehu]

Idle adjustment is set to it's highest of the range it can be in spec.

I did take it back today to the dealership because it was acting up often today, the tech came out with me and I showed him what it was doing and he says that it could be the IAC valve, but this is not the normal symptom of IAC valve trouble. He says that it would normally stick open or closed causing a high or low idle respectively.

They have the IAC valve on order and should be in the next few days. I'll post after they replace it.

I checked for Vac leaks... I didn't notice any cracks.. but I am not really sure how to really check for a vac leak.

I hunt them with a stethoscope with a slender tube for a probe.

You can also use a propane torch (unlit). Hold it near the suspected leak then turn the gas on. Idle will change.

 

[Jehu]

The Honda dealership installed a new IAC valve today. Haven't fully tested it yet but... it did act up once today after I got it back. Idle speed drops down after the gas has been touched. :0(

Idle adjustment is set to it's highest of the range it can be in spec.

I did take it back today to the dealership because it was acting up often today, the tech came out with me and I showed him what it was doing and he says that it could be the IAC valve, but this is not the normal symptom of IAC valve trouble. He says that it would normally stick open or closed causing a high or low idle respectively.

They have the IAC valve on order and should be in the next few days. I'll post after they replace it.

On 2005-02-16 said:
[snip]
I checked for Vac leaks... I didn't notice any cracks.. but I am not really sure how to really check for a vac leak.

I hunt them with a stethoscope with a slender tube for a probe.

You can also use a propane torch (unlit). Hold it near the suspected leak then turn the gas on. Idle will change.

 

[TeGGeR®]

The Honda dealership installed a new IAC valve today. Haven't fully tested it yet but... it did act up once today after I got it back. Idle speed drops down after the gas has been touched. :0(

Thanks for the update. Did they check for air leaks first?

 

[Jehu]

I assume they would.. being in there and all, but Im not sure.

 

[Jehu]

I am not sure if the new IAC valve is masking the indle drops or if it is actually just better. It seems it isn't doing it half as much now with the new IAC and an ECU reset. After the ECU reset I noticed better throttle respones too :0). The gas pedal feels kinda gritty at the top or like it is sticking just a slight bit. (new throttle cable, replaced by honda recently). Seems that it is felt right at the throttle body when I give the car some gas from under the hood. Can I clean the spring loaded throttle thingy?