New PCM

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Jun 13, 2024 | 04:47 PM

Bosbury1

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Joined: Jan 2012

Posts: 223

Likes: 9

Year: 1994

Model: Cherokee

Engine: 4.0

New PCM

Replaced my PCM today seems the idle is a tad low. How long does it take for the PCM to learn the new components? Thank you.

Jun 13, 2024 | 05:38 PM

BruceB

CF Veteran

Joined: Jan 2014

Posts: 1,102

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From: Eustis, Florida

Year: 1996

Model: Cherokee (XJ)

Engine: 4.0

When I replaced my PCM it ran rough for 15-20 seconds and then it smoothed out has been fine ever since.......
If you haven't done this, you may want to clean the Idle Air Control sensor

Jun 13, 2024 | 07:34 PM

Bosbury1

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Joined: Jan 2012

Posts: 223

Likes: 9

Year: 1994

Model: Cherokee

Engine: 4.0

I will clean the IAC. Thanks.

Last edited by Bosbury1; Jun 13, 2024 at 08:47 PM.

Jun 14, 2024 | 06:37 AM

Bosbury1

Thread Starter

Member

Joined: Jan 2012

Posts: 223

Likes: 9

Year: 1994

Model: Cherokee

Engine: 4.0

Had a spare IAC cleaned installed. Voila perfect. Thank you sir.

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