"Live" data code readers

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Jul 24, 2009 | 05:07 AM

kynnhoj

Thread Starter

Senior User

Joined: Feb 2005

Posts: 333

Likes: 1

From: Toledo, Ohio

"Live" data code readers

Will a "Live" data code reader give readings of cylinder mis-fires on an engine that is stuttering? (engine is not throwing codes)

Or other readings to help pin point the cause?

Thanks, John

(pulling my hair out, as I'm sure others are here too!)

Jul 24, 2009 | 08:02 AM

Monster-4

Logistics Pro

Joined: Aug 2007

Posts: 3,974

Likes: 18

From: Millersburg, OH

I know my scanner (Actron 9180) will read misfires recorded by the PCM. The PCM will NOT throw a code on misfires (unless there is a complete failure of the coil) but will record them. You just need a scanner/reader that will read that info from the PCM.

Jul 31, 2009 | 05:47 PM

kynnhoj

Thread Starter

Senior User

Joined: Feb 2005

Posts: 333

Likes: 1

From: Toledo, Ohio

Finally ordered a "live" code reader. (Actron 9145)

While waiting for it to arrive, I finally was able to pull a code with my cheapy code reader (still no CEL light) p308- #8 cylinder misfire.

Changed #8 COP and misfire is gone, running great!

Next day, new code reader arrived. Guess I'll have to wait til next time for a misfire condition.........

John

Aug 5, 2009 | 03:56 AM

_Rick_

Elder User

Joined: Dec 2007

Posts: 784

Likes: 1

From: White Rock BC Canaduh

I've been using a Scan Gauge II (semi permanent installed in Truck) for maybe a year or so now. It's worked well for me finding codes as they occur. It's also come in handy in my '01 Montana.

Rick...

Quote:

Originally Posted by kynnhoj

Aug 5, 2009 | 07:35 AM

FortyFords

Post Fiend

Joined: Jan 2002

Posts: 5,859

Likes: 7

From: USA

The pcm has a threshold for cylinder misfires before it will post a CEL on the dashboard.
I forget what it is but its real high in the 5k range.
It will however store the codes for them .
Rich