Issues with the idle valve - Miata Turbo Forum - Boost cars, acquire cats.

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Old 08-07-2009, 12:54 PM   #1
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Default Issues with the idle valve

I need some help from the AEM gurus.

I've been facing issues with my car's idle valve. It works properly for the first few minutes and somehow it stops responding after a while. I originally thought it had to do with some kind of heat soak but I'm not convinced that's the case any more.

If I park the car for a little while and then turn it on, it works fine for the first few minutes and then stops working again.

Can anyone tell me what may be going on?

Thanks
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Old 08-13-2009, 03:45 PM   #2
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Open up the Parameters under the Idle menu.

Does the Idle position change at all?
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Old 08-14-2009, 12:00 PM   #3
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Post your map up and I'll have a look at it.
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Old 08-18-2009, 06:58 PM   #4
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Originally Posted by dustinb View Post
Post your map up and I'll have a look at it.
What am I doing wrong?

I'm trying to upload one of the AEM files and I get a message saying "invalid file"
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Old 08-18-2009, 11:04 PM   #5
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try emailing it to me as an attachment
scaliose [at] dbmiata [dot] com
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Old 08-19-2009, 10:49 AM   #6
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try emailing it to me as an attachment
scaliose [at] dbmiata [dot] com
Ok. Thanks
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Old 08-19-2009, 11:38 AM   #7
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What year is your miata?
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Old 08-19-2009, 02:55 PM   #8
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What year is your miata?
96
Built engine with 550cc RC high impedance injectors and 255 Walbro fuel pump
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Old 08-21-2009, 03:19 PM   #9
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Dustin, the map I sent you allows me to use the A/C while the car is not too hot and the only other issue I constantly face is when I decelerate and I'm coming to a stop. Quite often, the car will stall and shut off.

Thanks,
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Old 10-08-2009, 05:35 PM   #10
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Mine does the same thing. Did you end up figuring this out?
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Old 10-08-2009, 06:02 PM   #11
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Mine does the same thing. Did you end up figuring this out?
No, I did not.

As I told you in my pm; a local mechanic suggested that I adapt a solenoid to control the A/C. I still haven't found one I could use.
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Old 01-25-2010, 12:25 AM   #12
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I hate bringing up old topics, but I am having the same problem on my AEM EMS. I am working off the base calibration file adjusted for RC 550cc (3ohms). Everything is fine until the water temp gets around 150F. If I blip the throttle, it idles at 2100 rpm. Unplug the IAC, and it returns to a normal idle. I have sent a few PM's, but I was going to see if anyone had solved this problem? Thanks.
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Old 01-25-2010, 09:26 AM   #13
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I hate bringing up old topics, but I am having the same problem on my AEM EMS. I am working off the base calibration file adjusted for RC 550cc (3ohms). Everything is fine until the water temp gets around 150F. If I blip the throttle, it idles at 2100 rpm. Unplug the IAC, and it returns to a normal idle. I have sent a few PM's, but I was going to see if anyone had solved this problem? Thanks.

pm replied.

Connect to AEM PRO. Open the idle template. 2 tables called: "Idle Target Base table" and "Idle % vs Target Table" will appear.

I have my first one set at 1,000 rpms lowering to 900 once the temp reaches 190.

The other one (Idle %) is the one you have to play with.

Shoot me an email and I'll try to help you.

FWIW; I never had a problem with my car idling if I didn't turn the A/C on. It was that part I was originally trying to fix.
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Old 01-25-2010, 11:08 AM   #14
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Quote:
Originally Posted by Midtenn View Post
I hate bringing up old topics, but I am having the same problem on my AEM EMS. I am working off the base calibration file adjusted for RC 550cc (3ohms). Everything is fine until the water temp gets around 150F. If I blip the throttle, it idles at 2100 rpm. Unplug the IAC, and it returns to a normal idle. I have sent a few PM's, but I was going to see if anyone had solved this problem? Thanks.

Did you setup the Idle % vs target table?
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Old 01-25-2010, 11:19 PM   #15
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Thanks guys. I will start there and see what happens.
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Old 03-11-2010, 03:29 PM   #16
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I had that problem, changing the Idle FB Below parameter from 1800 to 2500 solved it.
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Old 03-15-2010, 08:57 PM   #17
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Yeah. After talking with a few others thats what I need to do. Weather and timing have kicked my butt lately.
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