Date: Thu, 10 Nov 2016 11:18:48 -0500
Reply-To: Larry Alofs <lalofs@GMAIL.COM>
Sender: Vanagon Mailing List <vanagon@gerry.vanagon.com>
From: Larry Alofs <lalofs@GMAIL.COM>
Subject: Re: Racing idle in the cold (1995 2.2)
In-Reply-To: <CAF9Ro-ar+pYMiuXnk8mnCSp_CaHUbPyWfArH-6-OMO+Zop7SFw@mail.gmail.com>
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First, you need to be very sure that your throttle cable is not sticking
enough to hold the throttle open a little. Many people on the
subaruvanagon Yahoo group have found this to be the problem after spending
much time and trouble chasing other possible causes.
After that, the IAC valve is another usual suspect, then perhaps
checking the resistance of the temperature sensor at various temperatures (
the one for the ECU not the dash gauge).
And of course "check your grounds" :-)
I'm not sure about a '95, but on the '90 - '94 EJ22 you get the check
engine lite to flash the codes by connecting two black connectors near the
ECU. The green ones put it into some other test mode where it cycles
various things on and off.
Larry A.
On Thu, Nov 10, 2016 at 9:39 AM, Vincent Dow <ianvincentdow@gmail.com>
wrote:
> Hiya subaru-vanagon heads,
>
> I'm driving *Modesto* around Montreal these days, and the temperatures are
> getting lower and lower.
>
> In past cold weather, I've had this recurring problem of the idle sticking
> at 2000 rpm.
>
> Again, *Modesto* is a 1982 Westy (air-cooled) converted to 1995 EJ22.
> Kennedy conversion.
> Hard worker and incredibly reliable.
>
> The cold weather really bums him out. This idle racing is incredibly
> annoying tho. Difficult and perilous to change gears (esp. reverse at that
> high idle)
>
> And I get a pretty regular check engine light in this circumstance, at
> which time the idle DROPS almost to a stall, and sounds CHOPPY. Loss of
> power. Then that light will go out, and power returns, but the idle stays
> high.
>
> I have tried to pull a code by grounding the green test lead off the ECU
> (and we did get it to start slowly flashing) but it never communicated a
> code that we could interpret.
>
> I am thinking IACV... maybe some gack built up in it.
> The Check Engine Light/low choppy idle phase is reminiscent of an open
> vacuum line - the way that sounds and feels. But it's intermittent. Would a
> stuck IACV eventually cause such lean running that the ECU tries to
> compensate..?
>
> Any input or experience seriously appreciated.
>
> Modesto is going in to our favorite shop this Fall, to have spare tire tray
> restored, and some other stuff like a leaking heater hose at the front core
> when climbing serious mountains. I'd love to figure out this cold running
> difficulty.
> best
> vinnie
>
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