Need carb help

[dlb]

walkersimpson, have you gone through all the suggestions mentioned here? there are quite a few so if you let us know which ones you've looked at, it will give us a better idea of what is going on.

and to echo petros' comments, i would not even bother trying to find a "good carb guy." virtually no one that works at any shops is familiar with carbs anymore, and especially not these ones. more guys are familiar with webers and holleys but even then, they often only know how to put them on a car and not how to troubleshoot them. one forum member found a backyard mechanic via craigslist to install his new weber for him and the guy wound up cutting the throttle cable and simply tying a knot in it, and stripped the threads where bolt that holds the throttle goes. so just take your time, be methodical, work through every system, and let us know what you've tried so far.

[walkersimpson]

Ok guys spent a few hours the other day throttle cable is fine took the carb apart and replaced the needle for the float with a spare once from the other carb I have and checked a bunch of other things and with some tests found I could make it run better when it was warm by placing my hand over at least half of the primary barrle which makes me think to much air while tweaking with it and giving it one last try had my engine run away on me all of the sudden it just went full throttle and had to turn it off and it took at least 15 second for it to stop desiling very scary got a bunch of new vac tubing and goi to see what that does I just hate that it was running great and now it won't even idle right or run properly can't get her below 1000rpm unless I put my hand over the carb and have the idle screw all the way out this is really anyone me and have to go through it all because of smog I just want it to work thinking about finding a carb person to bring it to but will do what I can before resorting to that do if anyone has any idea shoot them and if you could look at the info already given before giving the same info that would be great have already tryed everything I have been told thanks guys and will let you know how it goes

[Petros]

the only thing that will make it act like that is a bad vacuum leak. check the manifold bolts are tight, the carb bolts are tight, all the vac lines are connected, including the power booster hose (a leak in the power booster would make it act like that). did you replace the gasket properly when you had the carb off, the top of the carb open? did you get the rubber o-ring like gasket in place that goes between the top of the carb (the air horn), and the body of the carb? It is easy to misplace or to forget to install.

Taking the carb apart before you found the problem is a really bad idea. You could have created a new and bigger problem inadvertently, on top of the original one. that is why we need to always diagnose the problem BEFORE YOU TRY TO FIX IT.

There is not short cut and removing and replacing parts at random is like playing Russian Roulette on if you get lucky or not. You must systematically use the test procedures to eliminate the possible of any one system as causing it.

[walkersimpson]

thanks petros i checked the carb bolts need to check the manifold bolts and have checked all the vacuum lines because i replaced all the small one and will be replacing the larger ones soon. made sure to have both o rings on the carb before putting it back together. i know i should not be messing with stuff inside the carb before i know the problem but luckily it didn't make the car run worse seemed a little better to me. I happen to not have to test procedure for diagnosing the carb if you could give me some info or send me a link that would be great would love to start checking stuff off a list and narrowing it down. replacing the vacuum hoses seemed to make a difference it seems to run smother and sound better but still having trouble getting it below 1000rpm without it bogging way down and jumping up when i adjust the idle screw again. if you could send me the procedure that would be a great deal of help for solving this problem and future problems if they happen thanks Petros for all your help and know i should not have screwed with the inside of the carb from the beginning that is why im in this situation but that you for all your help

[Petros]

the factory Service manual (FSM) for the '85 model is at this link for free download:

https://tercel4wd.com/forums/viewtopic.php?f=7&t=8323

Go read up on the fuel system and the emission control system. there is a pretty good trouble shooting guide in each and will give you a list of tests to run, and the test procedures. Most are simple "unplug, and plug back in, observe if rpms increase" type of tests, some require a volt meter (if you do not have one you can get a cheap one from harbor Freight). Once you understand the operation better, narrowing it down faster will be easier.

Good luck.

[walkersimpson]

Spent some time working through stuff and could not figure it out keep getting a little closer and closer but can't quite get it so I have found a shop that specializes in Toyota's near me and going to bring it there and see if that can figure it out they specialize in 4wd Toyota's so that helps will let you guys know what it is when I figure it out thanks for all your help

[ARCHINSTL]

Good Luck with finding help at the Toy shop you mention (Note that I do NOT mean that sarcastically!).
The problem, as mentioned by others in various threads, is that so few people are familiar with carbs nowadays, let alone any system on cars that are older than the techs.
Tom M.

[walkersimpson]

i talked with one of the tecs for a while and asked him some questions and he knew the carb and has worked on them before they don't rebuild there they send them out the be rebuilt but the guy knew a good amount and going to see if they can find anything i couldn't it should go well going to stay at the shop and let them check it out and see whats going on will let you know how it goes

[walkersimpson]

Hey guys shop did a good job got some stuff working she idles now but they told me I'm only getting 7 psi over the 16 I should be getting from the intake and that the EBC valve needs replacing but the main problem is she is running lean and the fuel mixture screw is not working properly due to a clogged passageway so if you guys have any sugjestions for me on any or all of these I would greatly appreciate the incite thanks guys and hopin I will be on the road soon will post photos soon thanks everyone

[walkersimpson]

Passed smog she is registered still need to get the carb to run right have to fix the blockage but the good part is now I can mess with it and not have to worry about smog thanks guys for all the help I thank everyone that helped me get to this point you guys are great will start posting picture once I figure it out Still work to be done but one thing I have come to understand there is always more work to be done to make it better and keep it alive lots I plan on doing to this like a lift and new pipes and lots of other things will tell you about that as I do it thanks guys going back to work now will keep you updated