toyota carburator

My 76 had the same problem here in Oregon. On the side of the carb are two adjustment screws- one is idle speed and the other is mixture. I just leaned out the mixture to where it would barely run, then richened it about 1/4 turn and it passed smog just fine. When I got back home I richened it up a dab to get a smooth idle.

max-income

It could be the float level or the mixture adjustments (if accessible, might not be) mentioned by the other poster. A working catalytic converter might also be an issue. I'd imagine a new carb might cost close to what the truck is worth, call the dealer.

Try to clean and rebuild it. Parts are $47 at

Free shipping over $50 - so get a new set of plugs or radiator cap! List $58.95 sale price $46.82

sounds easy enough, how will i know which is mixture? and which is idle?

On 11-Jan-2004, snipped-for-privacy@aol.com (ImRaul33) wrote:

The idle screw is located close to the linkage that moves when you depress the gas pedal, and presses against the linkage. It acts as a stop for the linkage so that the idle can be adjusted. The end of the screw is usually flat (looks like a normal screw) and the screw has a spring under the head. The spring serves as a tensioner to prevent the screw from moving and changing its setting. The mixture screw is similar in that it has a spring under the head for the same purpose. But it screws into the body of the carburetor, and is generally located low on the carb. The end of this screw comes to a point after a long tapered section. If you remove it to be sure it is the right screw, first turn it in GENTLY until it bottoms, noting how many turns it takes to get there. When you put it back in, bottom it gently and then turn it back out the same number of turns you counted when you originally bottomed it. The tip is tapered at a particular angle, and goes into a small hole to adjust idle gasoline flow. If you bottom it hard you can mess up the tip and make adjusting the idle mixture difficult if not impossible. Turning the mixture screw in will lean out the idle, while turning it out will make it run rich. If it passes smog after leaning it out, use a tach to set the idle speed by moving both screws. Adjust the speed with the speed screw, then adjust the mixture screw to get smooth idle, which will usually raise the idle, which you then lower again with the idle speed screw, then readjust the mixture screw to get a smoooth idle. Repeat until you have a smooth idle at the proper speed. When the mixture screw is adjusted properly, leaning it at all (1/4 turn or less) shouild give a rough idle. You want the best lean mixture that you can get. For really detailed info, get a shop manual for your vehicle. And also a Haynes manual if you're not very experienced. The Toyota shop manual has much better detail, but little technical explanation. It's intended to be used by experienced mechanics. The Haynes manual is much less technical, and much less detailed. But when you find something in the shop manual that you don't understand often the Haynes will explain it in a more simple, although less detailed, manner.

max-income

I had the carb off of my '84 4runner rebuilt several years at the Carburator Shop in Costa Mesa. It cost about 300 and passd smog.

I fount the best price on a re-built carb for my '87 here:

$220 plus $75 core charge.

Here's a place to look:

Tom...