[Shotimes] Aggrevating engine problem

[Steve Weinrich]

I'd look at the ISC/IAB valve.

Run the KOER diagnostics and see if you get a code for the Idle Speed
Control.

All of your symptoms can be caused by this part.

Also, inspect for a vacuum leak.  The ISC/IAB valve is supposed to be a
metered vaccum leak.

Steve


----- Original Message -----
From: "Thesing, Hunter M." <HMTHESING@stthomas.edu>
To: "Shotimes Posting" <shotimes@autox.team.net>
Sent: Monday, February 10, 2003 10:18 AM
Subject: [Shotimes] Aggrevating engine problem


> Once again, I seek help from the SHO gods.  I just replaced my fuel pump
with
> a high flow unit in hopes of remedying a stalling problem.  However, it is
> still stalling.  It does it when I am stopped or sometimes when I push the
> clutch in (such as downshifting).  The RPMs bounce up and down and usually
> stalls.  I also just replaced the O2 sensors. Also, possibly related, at
times
> (mostly at highway speeds) it will cruise at a constant speed, but when I
give
> it a little more gas, it stumbles, bogs, and sometimes jerks.  It feels as
if
> it's not getting enough fuel (or air).  The spark plugs and wires are less
> than a year old, so I wouldn't think that they would have anything to do
with
> it.  It's a weird problem.  Sometimes I have power up the wazoo, and
sometimes
> I wish I had my Saturn again.  Anyways, any ideas or suggestions would be
> greatly appreciated.
>
> Thanks,
> Hunter Thesing
>
> '93 SHO Emerald Green MTX
> 98,600 Miles
> 190 LPH fuel pump
> K&N Air Filter
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