[Shotimes] Stumbling at highway speeds

[Ron Childs]

I doubt that the IAB would cause trouble at cruise speeds. The throtle would 
be open and the IAB not in use.

-Ron Childs   '91



>From: "Justin Schick" <jschick@aafp.org>
>To: <shotimes@autox.team.net>
>Subject: Re: [Shotimes] Stumbling at highway speeds
>Date: Tue, 25 Feb 2003 10:09:14 -0600
>
>If it's not the IAB, my guess is O2 sensors. You'll find out once you
>pull the codes You can do it with a paper clip while watching the CE
>light blink, but that's obviously more involved than viewing the output
>of a code reader. Mine would trip the light as soon as the throttle
>position changed after long trips at constant speed.
>
>The stalling makes me wonder about the IAB though. Just because it's
>new doesn't mean it's good. If it is truly ok, the MAF wire is clean
>(and not oily from an overdone K&N cleaning and re-oiling), the TPS is
>functioning properly, and the O2's check out, I dunno...
>
>Justin
>dead 92
>
> >>> "Thesing, Hunter M." <HMTHESING@stthomas.edu> 02/25/03 09:58AM >>>
>Okay, hopefully this will be my last posting for a while, as I'm sure
>you're
>getting tired of my stupid car.  For those of you helping me or who
>have been
>following my progress, the car is running much better now.  Overall, I
>am
>pleased.  However, it still has a few quirks that are bugging me.
>
>At highway speeds (60-75) it sometimes loses power when cruising (just
>enough
>to be noticeable).  And when I give it a little gas, it stumbles.  If I
>keep
>pushing the pedal down, it gets worse, and then at a certain point,
>the
>stumbling stops and it starts to accelerate.  Could this be the point
>where it
>goes into WOT?  That could explain a few things.  I'm not sure if this
>is
>related, but I have a check engine light that comes on intermittently,
>but
>doesn't seem to correlate to this problem.  I'll have codes
>(hopefully)
>tomorrow when I buy a new battery for my reader.
>
>Any ideas?  I had an '84 Buick Skylark that had similar problems that
>were
>corrected with a new MAF.  Does that sound like this could be it?
>(note:
>recently cleaned MAF)
>
>Also, possibly unrelated, my car has been stalling intermittently, only
>when
>coming to a stop (no engine load), and not all the time.  Again, for
>those
>following my saga, I have a new IAC now, which has helped with the
>idling, so
>I think it must be something else now.
>
>Again, I greatly appreciate the feedback from all of you.  Without this
>vast
>knowledge at work, I probably would have kept my wife's Saturn to
>drive, since
>it has been more reliable than the SHO.  Oh, well.
>
>Thanks again,
>Hunter Thesing
>'93 MTX EG
>Sho Shop 190 LPH Fuel Pump
>K&N Air Filter
>Homemade Ram Air
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