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1989 LWB Check Engine Light #22 Crank Angle Sensor #1104347
05/19/18 03:57 AM
05/19/18 03:57 AM
C
chadzeilenga  Offline OP
Getting the Wheeling Fever
Joined: Apr 2018
Posts: 55
Charlotte, NC USA
Hi All,
Shortly after I replaced the failed AC Temp Sensor, I got a new Check Engine Light. I was able to read the code to be 2 long sweeps and then 2 short ones which I believe is a #22 (Crank Angle Sensor)

What I have been observing is that when cold, the vehicle has been hard to start. It will crank over strong, but I seem to feather the gas a little to get the RPM's up as it sputters etc and then is fine the rest of the time I am driving it. Warm re-starts are not a problem. Only other issue is a slight miss/rough idle in gear only, not yet sure if they are related.

So I read through the MPI manual. For a cold engine, it mentions the fast-idling air valve, but I cannot seem to find this anywhere else in the manual. Section from manual is attached.

Attached Files
Capture.JPG (2 downloads)

Chad Zeilenga
1989 Gen 1 Montero
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Re: 1989 LWB Check Engine Light #22 Crank Angle Sensor [Re: chadzeilenga] #1104348
05/19/18 02:09 PM
05/19/18 02:09 PM
D
dfreem01  Offline
Need a Spot
Joined: Oct 2016
Posts: 13
CO
It's referring to the Idle Air Control Valve. IAC. It's on the air intake. David

Re: 1989 LWB Check Engine Light #22 Crank Angle Sensor [Re: dfreem01] #1104349
05/20/18 04:34 AM
05/20/18 04:34 AM
C
chadzeilenga  Offline OP
Getting the Wheeling Fever
Joined: Apr 2018
Posts: 55
Charlotte, NC USA
Originally Posted by dfreem01
It's referring to the Idle Air Control Valve. IAC. It's on the air intake. David


Hi David,
Thanks for that. I pulled it out tonight and cleaned it all up. I really need to pull the throttle body, but will wait for the gasket I ordered to come in the mail.

Attached Files
IACV Dirty.jpg (0 downloads)
IACV Dirty
IACV Clean.jpg (0 downloads)
IACV Cleaned

Chad Zeilenga
1989 Gen 1 Montero

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