Well, I tried this on my 86 tercel 4WD wagon, and I think the short answer is "you don't." The aisan carburetor on this model has a lot of little parts rattling around inside it (just like any carburetor, I suppose!) and it's difficult to get back together and have it run right. Plus, it needs to be calibrated to work with the feedback system installed on those vehicles. Mine works more or less, but I'm planning on just biting the bullet and buying a professionally rebuilt unit. I figured that after 150k miles, the car deserves it! Here's a link to a site I found that seems to carry the one I need:
I saw some improvement after rebuilding mine, but the bigger problem might be the emission controls that work with the carb. I would consult a manual and check these out before tearing into the carb. Some people are putting Weber 32/36 carbs on the 3AC motor. Check out this thread:
Toyota tercel, Automotive Repair Manual, 1987 thru 1994. (Haynes)
.043 is the correct gaping for the plugs in a 1993 Toyota tercel. This is taken rite from the Hayes repair manual
Use the Autozone online repair manual. This is the link I use to access the Toyota Tercel info for a 3E engine. http://www.autozone.com/az/cds/en_us/0900823d/80/1b/79/03/0900823d801b7903/repairInfoPages.htm
The alternator is on the passenger side between the firewall and the motor.
A person should have a diagram when they are working on a carburetor of any car. A diagram for the 1987 Toyota Corolla carburetor can be found in the maintenance manual and the repair manual.
Local auto part stores will have a print out available for a 1984 Toyota Tercel. The stores computer network is connected to a database that houses diagrams, fuse layouts and repair needs of Tercels.
according to the haynes repair manual sparkplug gap is .043 inches
sign up for autozone and use there repair guides or ask the guys on the all auto forums www.the-engine-source.com they will post them promptly hope this helps
you need to take it to a repair shop and have it scanned for codes.
I was looking at my Chilton's Auto Repair Manual and for a 1978 Mercury Cougar it only shows a two barrel carburetor for the 351 Windsor V8 engine
buying the repair manual it tells you how to do it.
By replacing them. Purchase a repair manual at most parts stores, ( around $12 ) for detailed instructions on this and many other repairs.