72 TA : New Project

[njsteve]

Today's lesson is the principle of Occam's Razor or in Latin, Lex Parsimoniae, which translates to "the simplest explanation is usually the correct one".

I have been chasing down a tachometer gremlin for a while trying to figure out why the tach would not rev beyond 4000 rpm even when the engine was obviously going faster that that. Also, when the engine was cold, the tach would read double it's actual engine reading.

Well, after fiddling around, running extra tach leads to other tachs to compare readings, checking the distributor leads, checking point dwell... I was about to pull the coil and change that.

Guess what...the coil wire was not fully seated into the top of the coil and all this time, the voltage was just jumping across which, while powering the ignition system, was wreaking havoc with the tach accuracy.

So I pulled the coil wire, cleaned the terminal ends, pulled the boots way up and made darn sure both terminals were locked into the coil and the distributor. And now the tach reads correctly.

So let that be a lesson to everyone - check the simple, stupid stuff first. [img]<<GRAEMLIN_URL>>/scholar.gif[/img]

[el hemi]

Steve..couldnt help it but I went right to Wikipedia to understand what the heck you were talking about. So I am going to pick myself up from the couch and put to use Occam's Razor and find why my MSD box works one day and not the next!!! Keep bringing us the stories Steve.

[njsteve]

Looks like we're getting some free press:

http://blog.hemmings.com/index.php/2...to/?refer=news

[img]<<GRAEMLIN_URL>>/beers.gif[/img]

[Xplantdad]

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: njsteve</div><div class="ubbcode-body">Looks like we're getting some free press:

http://blog.hemmings.com/index.php/2...to/?refer=news

[img]<<GRAEMLIN_URL>>/beers.gif[/img] </div></div>

As it SHOULD be. You should write a book Steve [img]<<GRAEMLIN_URL>>/smile.gif[/img]

[SS427]

Now that's cool!!!!!! Nice going Steve.

[SuperNovaSS]

I don't understand the chalk marks. The car was already aligned right? Why not drive it until you know the wheels are straight, pull the wheel, then reinstall it straight? Looking great Steve!


Jason

[al8apex]

you can't &quot;pull the wheel&quot; because it is keyed on the spline.

To center the steering wheel you adjust the tie rods ...

if the steering wheel is to the right, then you adjust BOTH tie rods ends to the right so the wheel effectively is centered ...

the 2nd gen f bodies like nearly zero toe in, the closer to 1/16 the better ...

[SuperNovaSS]

Hmmmm, interesting. I didn't realize that.

Jason

[Bert]

Steve,
If its not already spoken for...I would like to buy the tilt from you..
let me know please..
[email protected]

[njsteve]

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: Bert</div><div class="ubbcode-body">Steve,
If its not already spoken for...I would like to buy the tilt from you..
let me know please..
[email protected] </div></div>

Bert, I sent you an email.