Funky Idle question...

[dcbrewmeister]

Before I replaced my injectors my car would idle strange. It would surge and them drop off like it was going to stall and catch itself. Now it doesn't do that. What it does do is sit there and idle perfect for about 2 minutes, then start to stumble. You drive for a short time and it will start all over, idle fine then start to stumble...

Is this the ICV goofing up? I've got one I plan on trying this weekend, but what else would cause something like this? I can't see it being a vacumn leak because it's not a constant stumble... Though I'm not ruling that out either...

This is only when the car is warmed up also...

[m535is]

I have seen AFMs do this as there is a intake temperature sensor in the AFM. This over time gets clogged up with dirt and especially if the car idles for a little bit it will heat sink into the sensor making the computer think that the intake temp is higher than it is and adjust the mixture, etc for it. This makes the car run a little funky. I would try cleaning the sensor off and see if that helps. If not and the ICV doesn't help then you might want to try to find a known good AFM to try in the car.

Hope this helps,

[dcbrewmeister]

What should I clean the AFM and ICV with? I read a warning not to use gumout or carb cleaner as it may cause them to stick So what are you supposed to use?

[m535is]

You should clean both. I usually use a silicon based cleaner/lubricant on the ICV and flapper door of the AFM, as for the temp sensor it really doesn't matter what you use as it is in it's own separate recess in the casing.

Hope this helps,

[russc]

you can use electronic circuit cleaner/degreaser on the temp probe. You can buy this stuff at any auto supply or hardware store.

RussC