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Mistaken Identity

by | Nov 2009 | 2 comments

I was called to a shop for a complaint on a 1997 Chevy van with a 5.0L engine (Figure 1) with a hard start no start problem. The shop had just replaced the engine because the old engine had a lower knock in it caused by a worn bearing. The old eng...

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2 Comments

  1. Tricounty
    Tricounty on February 2010 at 4:41 am

    I’m curious what John was monitoring in figure #2, as far as the purple 180 and 30 degree signals (perhaps CMP and CKP). Shouldn’t the 30 degree signal been a clue? Should they instead be at 22.5 degrees for a V-8?

    Nice article, well written.

  2. Tricounty
    Tricounty on February 2010 at 4:41 am

    I’m curious what John was monitoring in figure #2, as far as the purple 180 and 30 degree signals (perhaps CMP and CKP). Shouldn’t the 30 degree signal been a clue? Should they instead be at 22.5 degrees for a V-8?

    Nice article, well written.

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Old Habits: Spark Plug Service Now

Old Habits: Spark Plug Service Now

Nov 2012

A whole lot of evolution has occurred since most of us first started replacing plugs, so it’s time we re-examined our procedures and incorporate the latest subtleties

read more
Keeping Gasoline Fresh

Keeping Gasoline Fresh

Nov 2012

The life span of the gasoline you buy at your local station can range from several months to a couple years from the day it was refined depending on how it was stored.

read more

2 Comments

  1. Tricounty
    Tricounty on February 2010 at 4:41 am

    I’m curious what John was monitoring in figure #2, as far as the purple 180 and 30 degree signals (perhaps CMP and CKP). Shouldn’t the 30 degree signal been a clue? Should they instead be at 22.5 degrees for a V-8?

    Nice article, well written.

  2. Tricounty
    Tricounty on February 2010 at 4:41 am

    I’m curious what John was monitoring in figure #2, as far as the purple 180 and 30 degree signals (perhaps CMP and CKP). Shouldn’t the 30 degree signal been a clue? Should they instead be at 22.5 degrees for a V-8?

    Nice article, well written.

Submit a Comment