(was) 1987 5KTQ Coil Test

[DeWitt Harrison]

Hi Doyt.

I got to the shop today. The book says your intake air
sensor should read between 400 and 700 ohms. Mine
read 495 ohms at 24 deg.C. The error code for a bad
sensor is 2322. There are different versions of this sensor
having different resistances and with different p/n suffixes.
I can provide a p/n if necessary.

The wiring to the ECU is as follows:
  Sensor connector (if installed) pin 1 to ECU pin 23
  Sensor connector (if installed) pin 2 to ECU pin 24

If 'bad' sensor code but good resistance reading, check
wiring, e.g. 400 to 700 ohms across ECU pins 23 and 24.

Your car may have the sensor soldered in with no connector
as mine was. There is a connector kit to turn that into a
more normal, disconnectable arrangement. Must be a TSB
on it.

Hope this helps.

DeWitt

----- Original Message ----- 
From: "Doyt W. Echelberger" <doyt at buckeye-express.com>
To: "DeWitt Harrison" <six-rs at comcast.net>
Sent: Saturday, April 29, 2006 2:44 AM
Subject: Re: (was) 1987 5KTQ Coil Test


> Hello DeWitt................recently my beloved 87 5ktq old beast has been
> showing a "check engine" flicker whenever I accelerate. It doesn't happen
> until the engine is warmed up. My Bentley is temporarily 'borrowed,'  so
> I'm lost on this........... what should be the resistance of the air temp
> sensor?
>
> Doyt Echelberger
>
>
>
>  >>>>>>>>>>>>>>>>>>>>>>>>
> At 10:22 PM 4/28/2006, DeWitt wrote:
>
> >With these old beasts, it could be many things. But my gut feeling is
that
> >for stumbing under acceleration, you ought to check the codes for a bad
> >intake air temperature sensor. Next time you put your foot into it, try
to
> >notice whether your engine light flickers a bit.
> >
> >DeWitt Harrison
> >'88 5kcstq
>