Got a cheap Iswara with 4G13 carby for daily beater & fun , from the day I got it , it has this sputtering problem appears around 4.5K rpms ...
Been replaced the distributor/coil unit & high performance spark plug cable with New ngk spark plug ...
At 1st the problem goes away immediately , the whole performance of the car transform , willingly to rev to 8K rpm at 1st & 2nd gear ...
But after I've driven it hard , when stopped the water temp gauge raise to one bar below red zone & it quickly falls back to normal when I'm on the move again ...
Now the sputtering problem comes back exactly the same point at 4.5K rpm if I floor the pedal , if I kept around half to 80% it will revs smoothly even over 6 grand rpm but if I suddenly floor it , the sputtering cames back ...
It just like a rev limiter , the rev just stays at thr & won't raise ...
What should I need to check ?
Any advice will be really appreciated
Been replaced the distributor/coil unit & high performance spark plug cable with New ngk spark plug ...
At 1st the problem goes away immediately , the whole performance of the car transform , willingly to rev to 8K rpm at 1st & 2nd gear ...
But after I've driven it hard , when stopped the water temp gauge raise to one bar below red zone & it quickly falls back to normal when I'm on the move again ...
Now the sputtering problem comes back exactly the same point at 4.5K rpm if I floor the pedal , if I kept around half to 80% it will revs smoothly even over 6 grand rpm but if I suddenly floor it , the sputtering cames back ...
It just like a rev limiter , the rev just stays at thr & won't raise ...
What should I need to check ?
Any advice will be really appreciated
