Auto Mechanic new to list, can help with parts ID

[AL8001 at aol.com]

Hi all just found this group , looks like lots of inside information.

I've noticed some people have trouble locating parts.  Better auto parts
stores ( not places like Parts America, Advance Auto, Whitlock, ect. . .) have
what's called in the industry a "Buyers Guide"  and " Numerical Listing"
books.    These are a great help when the model of car isn't known and all you
have is a part in hand.

Some interchange info:  

Holley Throttle Body EFI 

The throttle body looks similar to the ones used on most 87 and up Chrysler
products.
Look under the hood of a 2.2 or 2.5 L 4 cyl powered Reliant, Spirit, Acclaim ,
a V6 Dakota  or a V8 full size pick up.

The fuel injector is built by Bosch and dosent seem to be used on any other
cars, they are color coded.

The Idle controll air valve,  if this is the one that has 4 small flat
electrical pins , is should be a Chrysler unit.

O2 sensors:

There are two basic types  Titania and Zirconia

Zirconia is the most common  It produces voltage ( 1 V when fuel mixture is
rich, 0 V when fuel misture is lean)  when the O2 content of the exhaust is
low.  The sensor output isn't linear, there is a sharp change in voltage when
air/fuel mixture is around 14.7 to 1.

One wire: No heater, the body of sensor is the ground. GM, Ford, Chrysler plus
others usually 18 mm thread.  Can swap among each other though a plug swap is
needed.

Two wire: No heater, one signal wire one ground wirebody also grounded  Used
by GM in the early 80's.  Can be replaced with a one wire sensor.

Three wire:  Has a heater for quick warm up,  once hot there isn't any
performance difference than a one wire.  One signal wire, two for the heater.
The heater usually takes 12V and isn't polarity sensitive.

Four wire: Has heater ( See three wire )  One signal Wire, One signal return,
two for the heater.


Titania

Used on many 86 up Nissans, some 89 up Corolla turbos and MR2 turbos and 87-90
Jeeps.  This sensor changes resistance as O2 levels change.  High resistance
~20,000 when fuel is lean, ~ 1,000 when the fuel is rich.    This sensor warms
up quicker and can tolerate higher exhaust temps than zirconia.

Spliceing O2 wires works, though extra care must be used.  Use a bare butt
splice, crimp with plyers that give a indentation on one side and a curve on
the other.  Solder the wires then cover with shrink wrap.  

EGR valves

Someone listed a # for a Delco valve on a Jaguar. Here is the break down of
the #
 DHZ ( Unknown)

17089090   (170 denotes Delco fuel sys, 89 is the first year of use, 090 is
the version
 
203 32N    ( 203 32 unknown, though I suspect it is a production date code, N
Negitive back presure.  Neg back persure means. .  .. . . Well I can't
remember, one gives more EGR as exhaust back presure increases and the other
gives less as exhaust back presure increases.

Most replacement EGR valves are semi universal ( as long as the base is the
same)  the main difference is max flow.  The Borg Warner brand valves come
with a bag of calibration washers, these are used to set up the valve though
someone could fine tune the valve for their application.  

That's all for now,  I'm tired   Got any other parts swap needs? post to the
list and I'll see what I can do