Repairing, restarting a problematic .... suv

 The initial fault was the electrical of fuel system, the car still wont start.   Then they went to the second fault -  the crankshaft sensor and the E.... engine finally started

Lack of interest in repairs - knowing repairs can increase your value

 This post has a very poor readership.  While there are plenty of articles that may interest a handyman, the stat on viewership does not match the effort that went into the posting. There are only 49 views after sometime

Maybe this is not an interesting topic, or people would not invest time and effort for the repair.   They would spend thousands in a repair shop rather than get their hands dirty or bang their heads thinking of how to know the parts, get the tools, and get the repair done

Learning to repair is:

1.  Self improvement -  we must improve everyday;

2.  This increases your value - to your employer and community even your family.  You save money in repairs.

3.   This knowledge comes in handy if your are travelling to far away places and no mechanic is around. You will be thankful that you did

Vehicle repairs: a guess work, luck, or product of critical thinking and scientific diagnosis

 Some would say that mechanics repair using any of the methods:

1.  Trial and error  (guesswork)   the mechanics does have a theory and hypothesis on what could go wrong and tries, and tries if one does nto work

2.  Luck -  he may have tried something and the car suddenly lights up;

3.  Sorcery -  he prays to the God, prays before deities that he may have the correct repair

4.  Scientific critical thinking:

    1.  Use of scanner to diagnose what is wrong so that he can easily find the faults;

    2. Differential diagnosis:

        1.  Comparing this with similar malfunction;

        2.  After cleaning:   compare the good part and bad part.

        We see this often:

       1,  No spark  -  trace when there is no spark:   at the spark plag, or the wire if not by process

                                of elimination the source is the coil

      2.  Fallo (misfire)  can be from:

           1.  From electricity -  coil or 2 gas:   from the injectors

                If from coil, remove the coils one by one.  If there is no change in engine operation if a coil

                is removed, then that coil is suspect

               If from injector, remove the injectors and fuel rail and see how the tip works.   If one does

               not spray,it is candidate for cleaning and or replacement

          This involves comparison (diagnosis) of the normal and suspect part.  Remove the suspect part and borrow a regular working part.  If it works, the suspect part is now candidate for repair  and/or replacement.   (This is the KT approach:   what is, what is not)