[Shotimes] engine problem, please help with diagnosis

[Steve Weinrich]

IAB valve.

It is responsible for controlling idle.  When it goes bad, strange things
happen, including every symptom you mentioned.

Try cracking the throttle 1/4 way while cranking and see if it starts.  If
so, the IAB is probably the fault.

Also, run the KEOR test to see if the computer can in fact controll idle.

Steve
----- Original Message -----
From: "Justin Schick" <jschick@aafp.org>
To: <shotimes@autox.team.net>
Sent: Wednesday, June 04, 2003 11:39 AM
Subject: Re: [Shotimes] engine problem, please help with diagnosis


> Are you giving yourself a couple second delay between moving the key
> from ON to START, so the fuel pump can pressurize the system? I wait for
> the low coolant light to go out before starting my 92, seems to coincide
> with the pump's pump-up time.
>
> Anyway, I would start by checking the fuel pressure. How old is the
> fuel filter?
>
> Justin
> '92 SHO in KC MO, 190k and counting
> SHOTimes list info: http://www.shotimes.com/SHO1.html
>
>
> >>> "van Oss" <vanOss@centurytel.net> 06/04/03 11:31AM >>>
> Having a problem with the 91.  Symptoms and medical history below.
> Please
> suggest what I should test or swap.  Thanks.
>
> Joseph van Oss
>
> Symptoms:
> - Long cranking time before start, gradually occurring more often over
> the
> last two weeks
> - Idle wanders up to 3K
> - Occasionally idle dives to 500, lopey, no power, and stalls if you
> step on
> gas
> - No CE light
>
> History:
> - 91 mtx with 140K
> - Within last 2 years:  Rod bearings, CID, CPS, timing belt, fuel
> pump,
> plugs/wires, much more
> - Extremely reliable and quick-starting up until about 2 weeks ago
>
> Again, thanks.
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