RyanW

yes i understand the thing about the "O/D" on and Off... And there are no Check engine indications flashing or indicating..

well O/D is not displaying in the dashboard... and yes, tried with the O/D on and O/D off... nothing changes...

well there was no "hum" noise before... and yes i can drive more than 100 km/h upwards with the rpm around 2500-3000 (but not shifting to the 4th)...

O/D is off.... And the 1st, 2nd and 3rd Gears Shift smoothly.... After 3rd Gear its stucked... and when i accelarate it gives a hum noise as well..

Hello, I recently noticed that My Corolla 121 Doesn't shift to its 4th Gear and it keeps on going on the 3rd gear and makes a "Hum" noise from the vehicle. Did check the Transmission oil and they seems to be fine. Any Comments????

Hey Varuna, Yes regarding the ignition coils - so far i have replaced 1 coil as it was dead (the car started to make a huge vibration) so i took it to colombo-auto-mac, then they checked and found out that 1 of the coil is gone... so i have replaced it as well.. cost me 11,000/- (9500 for the coil and the rest for fixing it). I think there is no fault on airflow... if so how do i find it??? and how much will the mass airflow sensor will cost? So i most of the time think either pump or injectors...

Thanks varunatech, By the way - my father said that the day he took it to AM; they have open the covers and have checked on everything of the engine and they have said "there is nothing wrong in the engine, whoever told it's sludge formed is a fool".. so i think then there is no problem/sludge form in the engine... But why does it do less on fuel?? I mean 7-8 in Colombo is really low... it should be around 9-10 (that is what i have heard from 121 owners). And i do pump 95Oct... so why is it?? i have done engine tune-up (air take cleaning, injector cleaning, throttle body cleaning....etc from AM, and replaced petrol filter Genuine as well) Please also let me know what engine oil to use.. AM said to use Mobil, but i have used Toyota... and i'm going to change oil maybe tomorrow, do i need to flush the engine??

Thanks varunatech for your reply, but i did a Full tank and fuel check and i came to find that it does around7-8 in city limits.. But it really does very good in outstation... it did 260Km (where i traveled Kurunegala) for a quarter (1/4) of the tank.. And in AM they did a good tune-up which they cleaned lot of carbon, and finally it started come out water drops... and they said now its good... And for the record, the engine was very smooth and all the gears shift quickly, but now the engine starting to go hard when accelerating, doesn't shift quickly.. the oil is also turned different colour... (after the service i have traveled 1600Km so far, do u suggest to make another oil change?? and what is the best oil to use? My vehicle is 1NZFE 121 (2002 model) and its done 84k km nearly.. and i use Toyota Oil also i pump 95octane... and do i need to change air-filter (i don't think i need to do that as i have traveled only 1600km) but let me know.. i have recently cleaned all the sensors with Kontakt SW, is it ok? Do i need to replace spark plugs???

Hey, I'm really a noob for these things, but guys pls help me out... I have a 121 (2002 Model) and it was doing less on fuel consumption (around 280-300Km for FULL Tank (42 Liters [City Limit])) so i took it to TTLanka. This guy removed and watch my engine and said that this engine has formed sludge and it will take 4 days to clean it up, they will have to replace gasket kit and so on blah blah.. it will cost u minimum of Rs.120,000/-.. Damn! So i took it to AM***j and asked them and they checked everything and there was NO such problem on the engine.. and they did an Engine Tune-up + Oil Change, Oil Filter Change and Air Filter Change (I use Toyota Oil BUT before i used shell 20-50W Which is NOT good at all)... Its been some couple of months and at the beginning it was doing well on Fuel Consumption like 360KM for Full tank [City Limit] but still i guess that is less.... and now its doing around 280-300KM again and so far i have gone 1600KM after the service at AM***j.. what would you'll suggest me to do?? I Pump 95Oct and i have changed my Petrol Filter and Spark Plugs before the AM***j service as well. and i recently used an 3m tank addictive with full tank and still no effect at all... Pls help...