Working on 1986 toyota celica . if i push gas petal slowly it will accelerate smoothly up to 3700 rpms then it startes to cut out . it will not accelerate past 4000 rpms .if u try to excelerate fast from an idle it sputters from the start. changed the plugs wires cap and rotor did not find any vacuum leaks in system
IF you have a carby then take it apart and clean it out as all the throats are not working properly including the accelerator pump.
SOURCE: Rough Idle on 1984 Toyota Celica Supra
You said you replaced the plugs - did you use the toyota platinum plugs? I found out the hard way that even the platinum plugs from bosch or any other kind of platinum plug just doesn't work right. Yes, they are more expensive from toyota, but they can make a difference in the way the engine runs.
SOURCE: 1985 toyota 4x4 22re missing and rough idle
Have you pulled out the spark plugs to see if there are any tell tale signs on them.They are a good indicator of many problems that occur and can save a lot of time isolating the problem.They should all be the same colour.Is the air box and lid properly secured with no leaks or splits in the intake tube.Have you put injector cleaner in the fuel tank to clear up any possible dirty injectors.Therse a few things your problem could be including engine vacuum leak which you can find by lightly spraying carburettor cleaner around suspect places such as inlet manifold and around injector seals.
SOURCE: 1990 Toyota Celica GTS. Idle races too high
sound very much like a vacuum leak.... also maybe your timing is off? possibly advanced? try retarding it with the distributor if thats the case...
SOURCE: 2006 Toyota Corolla wont start
this sounds like the electric fuel pump in the fuel tank has failed, replace the pump and filter togeather.
SOURCE: 92 celica starts, runs, then dies?
START WITH CHANGING FUEL FILTER FIRST , NEXT THE FUEL PUMP IS POSSIBLE TOO.
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