[jrichker]

Do an advanced search using jrichker as the user name and the word mounted. You will find two tech notes on rear mounted battery that will fix a lot of the problems associated with this modification.

[jcm-3]

Thanks, good info.

One question. Is it necessary to use the alternator ground specifically, as opposed to how I did it by connecting it to a 1/O cable directly from the battery ground?

[jrichker]

The idea is taht since most of the electrical items in the car use the body as a ground point that the alternator grounds to the body. That way it does not depend on another ground wire to provide a return path for the electrical power.

One 4 gauge wire from the block where you connected the battery ground wire to
the chassis ground where the battery was mounted up front. Use a 5/16” bolt
and bolt down the 4 gauge engine to chassis ground, make sure that it the metal
around the bolt is clean & shiny. This is the alternator power ground.

[sln583]

I was trying to track down a drivability issue that included an idle problem and figured the solution might help some one else.

I tried a bunch of other things with no success. I decided to switch out the Idle air control solenoid with a spare one I had.
I took them both apart to make sure they both worked and where clean, and low and behold, the one I was using on the car was missing the rubber oring that keeps unmetered air from entering the IAC.


You can see the Oring on the right

Here you can see the oring on the solenoid.

I had bought a used Ford Motorsport 65mm throttlebody off eBay and either it didn't have the oring in it when I got it, Or I took it off when I was cleaning it and forgot to put it back on.
Basically a 2 cent oring was driving me nuts.
Car idles fine now.

[liljoe07]

Thats honestly something Ive never thought about.

Thanks, Now I can say," hey man, check your IAC valve O-ring"........LOL

[Nicoleb3x3]

I think it would help if you can describe "driveablily issues"

[sln583]

I didnt want to clutter up the "surging idle checklist" thread with stuff that wasnt related.

You can see my tortured path here.

My 88 runs crappy closed loop

and here

Code 44 without a code 94

I had a bunch off different stuff going on, including a Bad o2 sensor harness, a vacumn line leaking, as well as that oring missing.
I assumed just one thing was wrong, it turned out to be a combonation of things.

My Car is still not 100%.
The car has never run right since I got her back in 1995.
I just learned to live with some things over the years. Not anymore
The quest for perfection continues.
I will continue to update the threads I started with any solutions I find.
Thankyou Stangnet for all the usefull info.