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I see. Then this sounds a lot of a dirty fuel system issue to me. Your engine pumps a lot of fuel due to high rpm and due to mechanical fuel pump when you do doughnuts with your car. You have also throttle open so lots of fuel and air flow through carb. So if a new carb will fix this issue, then you...

Swapping a new carb can work if a new gasket kit cannot fix issues. When you open your current carburetor, it is worth of spraying carburetor cleaner to dirty metal parts. I have positive experiences of carb cleaner made by CRC when I cleaned old Solex carburetor for another vehicle. If a carburetor...

According to service manual (https://tercel4wd.com/fsm/1985T4WD.pdf), max RPM is for adjusting ignition 950RPM. So steady 900RPM should do fine. The service manual also verifies procedure mentioned by dlb. So that would be a good start. You don't need to turn distributor back to original spot just f...

For it me it sounds like your high idle is fine (first minute with 1200 RPM). Then the problems begin when moving to low idle. It sounds to me like it is getting too much air occasionally. But it is still worth of checking timing and distributor parts as previously mentioned. At which RPM you set yo...

It is good to hear that you have a functioning vacuum unit, it helps a lot with original carburetor and is kind of a requirement. As dlb mentioned, it is worth of thinking timing angle next. You may want to clean the carb as NVMO mentioned and also a fuel tank if the RPM fluctuation is caused by dir...

I see. I assume, that you have several lines to distributors at vacuum advance canister? I know that different Tercel 4wd models could have from one to three vacuum lines to vacuum advance canister at distributor. First line is from disributor vacuum advance to carb, second line should be from distr...

I had similar issues with my 4wd Tercel. A fix to my issues was a remanufactured distributor. My original distributor had a failured vacuum unit, which caused Aisan to have wrong timing advance at idle both warm and cold. Simple check to verify functionality of vacuum unit is to check if timing adva...

Thank you for welcoming me to forum. It is interesting to chat about these cars. Thank you for searching these figures. European AL25 VIN codes were around 300 000 at the beginning of 1988 so I guess that most of Sprinter Caribs were AL25's then. I see. Have you tried to read French Tercel blog via ...

Hi everyone and thank you for accepting me to forum. I have owned Tercel 4wd's since 2004. Since then I have usually owned two of them, including now also. I am located in Finland and I have heard, that Finland received just under 1000 new Tercel 4wd's between 1982 and 1988. So the Tercel 4wd was he...