Insanely High 4AFE Fuel Consumption

[Veloc]

Hi... I got a problem here and do not what is wrong. Hope all sifu can put in some opinion to help...

I'm I just bought and am now driving a year 97 Corolla AE111. 1.6 litre 4AFE engine with auto transmission. This engine is reknown for is fuel economy and power in the 1.6 litre class. But my car only manages 330km for RM80 of RON97 fuel (mix city and highway driving). Isn't this a bit insane? It's around 24 cents per km or 41km for RM10!!! I know auto gearbox consumes more fuel but is this really the reason? Seems too much! Some 4AGEs are even more economical. This consumption is killing me as I drive average of 60 kms a day because of my job

Please advice... thank you!

 

[lkeong88]

Is your O2 sensor working? Check you ECU for error codes? If none then try to reset the ecu? Clean your fuel injectors? What engine oil are you using? 20w50?

 

[xMika]

My 3SFE worst. Full tank ron95 RM80 just around 300km only .. duno is o2 sensor problem or ecu needs retuning .. i think is the o2 sensor problem

 

[Veloc]

I've checked the exhaust. Standard 1.75 inch piping. Only the muffler bigger. So shouldn't be affecting. Do you think changing to manual gear will do any good? I've been using wira 1.3 and ascend 1.6 manual and they give me 57 - 61 kms for RM10 petrol!!!

---------- Post added at 08:40 PM ---------- 6 hour anti-bump limit - Previous post was at 08:39 PM ----------

Is your O2 sensor working? Check you ECU for error codes? If none then try to reset the ecu? Clean your fuel injectors? What engine oil are you using? 20w50?

I haven't check O2 sensor. Will send for diagnosis soon. Oil, I'm not sure what number. But I've always used 76 semi-synthetic. Very smooth and powerful compared to many other.

 

[lkeong88]

Standard pipe so big? The pipe came with the car or you modded it? Changing to manual will not solve any problems, you need to find out the main cause first

 

[xMika]

My 3SFE is a manual ones yet the fc is so damn bad ...

 

[lwc1983]

Im driving a stock AE111 with stock 4AFE Manual. Im manage to get 50km/RM10 for RON97, mainly city use. If i keep running 4k rpm, can mange to get 40km+/RM 10 @ RON97. My O2 sensor have no problem.

 

[FGT]

Standard pipe so big? The pipe came with the car or you modded it? Changing to manual will not solve any problems, you need to find out the main cause first

Yeah, better go and get diagnostic check.

1.75 not standard ke keong? My car has the original pipe and it looks 1.75.

Im driving a stock AE111 with stock 4AFE Manual. Im manage to get 50km/RM10 for RON97, mainly city use. If i keep running 4k rpm, can mange to get 40km+/RM 10 @ RON97. My O2 sensor have no problem.

Hi bro,
What's your engine mileage?
Have u done overhaul or anything?
What's the rpm at 110kmh? When was the last time u changed ur clutch set?

My AE111 auto is running 60km for RM10 in city drive with my current gb kick-down problem because it's shifting only at 3-3.5k rpm. Usually can get 65-68km. Highway can get 70-80km if i run 110-140kmh all the way.

 

[nnik]

FC....need a lot of checks
Ur air filter, fuel filter, how's ur driving , ur engine healthy, clutch plate and many more..
if running standard la....i suggest u go to known workshop and check...easier
no need to get headache..and make sure get ori part..
my 2 cents

 

[FGT]

Im driving a stock AE111 with stock 4AFE Manual. Im manage to get 50km/RM10 for RON97, mainly city use. If i keep running 4k rpm, can mange to get 40km+/RM 10 @ RON97. My O2 sensor have no problem.

FC....need a lot of checks
Ur air filter, fuel filter, how's ur driving , ur engine healthy, clutch plate and many more..
if running standard la....i suggest u go to known workshop and check...easier
no need to get headache..and make sure get ori part..
my 2 cents

heheh..headache is the most frustrating thing. nnik, u know any shop to repair my auto gb around s.alam or pj?

thanks

 

[wfhan]

or is it driving style ? heavy footed ?

 

[Veloc]

Yeah, better go and get diagnostic check.

1.75 not standard ke keong? My car has the original pipe and it looks 1.75.



Hi bro,
What's your engine mileage?
Have u done overhaul or anything?
What's the rpm at 110kmh? When was the last time u changed ur clutch set?

My AE111 auto is running 60km for RM10 in city drive with my current gb kick-down problem because it's shifting only at 3-3.5k rpm. Usually can get 65-68km. Highway can get 70-80km if i run 110-140kmh all the way.

RM10 get 60km... Now that's what I'm talking about... 4AFE suppose to be like that. Here in sabah, I baraly can reach 80 km/h because of stupid drivers in front of me who have all the time in the world. FYI, people here drive around 60 - 80km/h. Therefore, the lockup clutch seldom engages (around 80 km/h) which suppose to mean poorer fuel economy. But I know even so, the FC shouldn't be this bad. I drive very light-footed and usually go around 60-70 km/h at 2k - 2.3k rpms.

---------- Post added at 11:40 AM ---------- 6 hour anti-bump limit - Previous post was at 11:37 AM ----------

O2 sensor? I suspect is O2 sensor and exhaust sensor. But will O2 sensor really affect that much? I cannot simply change sensor because one O2 sensor at UMW costs about RM650.00!!! I don't know is it gearbox or not...

 

[Dayline668]

My 4afe auto running twinpipe 20v, apexi open port, going average of 50km per rm10 combine, heavy footed.. if u keep a above 80kmh thats the lockup kick in rpm will at 2k, dun rev above 2.5k then u will hav the best FC possible..

 

[xMika]

For my 3sfe, rm10 can go around 47km only. I'm a quite heavy footed driver but i'm driving a manual & usually shifts at 2k~2.5k .. 90% city driving, 10% highway.

 

[Dayline668]

For my 3sfe, rm10 can go around 47km only. I'm a quite heavy footed driver but i'm driving a manual & usually shifts at 2k~2.5k .. 90% city driving, 10% highway.

2.0 heavy body, wat the FC b4 this..? many thing can cost bad FC, engine problem, clutch slip, piping leak, engine lose compression, aircond not cold just to name a few.. :hmmmm:

 

[Veloc]

I sent it for diagnosis this morning LOL... Really O2 sensor kong out... ECU signal injectors to inject super-rich... No wonder my exhaust even got back-fire sound sometimes when I opena nd close the throttle quickly... Sadly, couldn't find any 2nd hand sensors here as the 2nd generation 4A-FE parts are rare... T.T New sensor in Sabah costs RM708 form UMW...

 

[lwc1983]

I have checked my o2 sensor couple weeks ago, its no problem. I have changed petrol oil filter. Air filter shouldnt affect so much on it. My engine mileage is 160km+-, i didnt do overhaul before. The main affect i guess is on my clutch set. I think its still the ori set from new car, lol.

I felt my engine no power compare to previous used of 5-30 engine oil. Im using 10-40 as ppl recommended for an old car.

---------- Post added at 05:53 PM ---------- 6 hour anti-bump limit - Previous post was at 05:42 PM ----------

My rpm for 100kmh is near to 3k, is this normal or not ?

 

[Dayline668]

I sent it for diagnosis this morning LOL... Really O2 sensor kong out... ECU signal injectors to inject super-rich... No wonder my exhaust even got back-fire sound sometimes when I opena nd close the throttle quickly... Sadly, couldn't find any 2nd hand sensors here as the 2nd generation 4A-FE parts are rare... T.T New sensor in Sabah costs RM708 form UMW...

Then u hav no choice but to change the O2 sensor, can ask runner in toyota forum to find 2nd, go ask AE101 wong (Ivan) aka lubang king..

I have checked my o2 sensor couple weeks ago, its no problem. I have changed petrol oil filter. Air filter shouldnt affect so much on it. My engine mileage is 160km+-, i didnt do overhaul before. The main affect i guess is on my clutch set. I think its still the ori set from new car, lol.

I felt my engine no power compare to previous used of 5-30 engine oil. Im using 10-40 as ppl recommended for an old car.

---------- Post added at 05:53 PM ---------- 6 hour anti-bump limit - Previous post was at 05:42 PM ----------

My rpm for 100kmh is near to 3k, is this normal or not ?

Ori 4AFE use 20-50, semi 10-40 is ok as im using it too. U driving manual as im talking about Auto tranny, maybe other can giv some manual input..? My 100kmh= about 2.4k

 

[FGT]

My rpm for 100kmh is near to 3k, is this normal or not ?

Ur driving a manual right? It seems ur clutch is slipping and needs a replacement.. 100kmh at final gear should be less than or around 2.5k rpm. If ur driving an auto, check the kickdown cable - i just fixed this on my car..heheh..that's how i know this. before this it upshifted very late, around 3-4k rpm..

On the lube issue, I think u use semi is fine until the engine starts to makan minyak or leaking.. temporary solution is going to mineral.. after that, total overhaul is the best option considering 4AFE is such a good engine. I dont think i would want to swap it for a diff one.

cheers bro

 

[Veloc]

I have checked my o2 sensor couple weeks ago, its no problem. I have changed petrol oil filter. Air filter shouldnt affect so much on it. My engine mileage is 160km+-, i didnt do overhaul before. The main affect i guess is on my clutch set. I think its still the ori set from new car, lol.

I felt my engine no power compare to previous used of 5-30 engine oil. Im using 10-40 as ppl recommended for an old car.

---------- Post added at 05:53 PM ---------- 6 hour anti-bump limit - Previous post was at 05:42 PM ----------

My rpm for 100kmh is near to 3k, is this normal or not ?

100km/h at 3k rpm not normal la... Mine auto around 2.2k rpm. My friend's manual around 2.5 oni....

---------- Post added at 11:00 AM ---------- 6 hour anti-bump limit - Previous post was at 10:57 AM ----------

Then u hav no choice but to change the O2 sensor, can ask runner in toyota forum to find 2nd, go ask AE101 wong (Ivan) aka lubang king..



Ori 4AFE use 20-50, semi 10-40 is ok as im using it too. U driving manual as im talking about Auto tranny, maybe other can giv some manual input..? My 100kmh= about 2.4k

Lol.. I jus change it today... Used a brand new Myvi one... Seems to be working fine la... I haven't tested the FC yet... Can use Myvi one as the plug is same. Denso brand sensor. Just the sensor probe need a little bit modification to fit the sensor hole... V simple job...

 

[j_l200s]

how much is the new myvi o2 sensor? which part of the probe that have to modify? sensor head or the sensor tapak? too big? too small? tapak size too wide or too narrow? pls share more info as i guess a lot of us have aged o2 sensor.

 

[Veloc]

how much is the new myvi o2 sensor? which part of the probe that have to modify? sensor head or the sensor tapak? too big? too small? tapak size too wide or too narrow? pls share more info as i guess a lot of us have aged o2 sensor.

New Myvi sensor costs RM180 only in Sabah. Okay... To explain the modification, it's like this.

Generally there are 2 shapes of sensors. The stick type where u just plug and play and the another more complicated type (stick with bracket). The Myvi is using the first type where u can just screw the sensor into the hole while my AE111 uses the second type where under the probe, there is a bracket (metal plate with 2 holes for screw attachments). So to let the Myvi sensor fit, all you have to do is just insert a metal plate and the bottom of the probe and then make 2 hole on each side of the metal plate (left and right) to screw it to the exhaust pipe. It's hard to picture... I'll try upload pictures when i'm free. I found one problem in doing this that is the surface area of the O2 sensor being reduces due to the space being taken up by the attached bracket. But it is just minor and the technician said that it is okay...

This is one weakness of the 2nd generation 4AFE engine. The sensors are different and difficult to source. Going for original UMW is insane. Most of the universal O2 sensor sold in the market today are the stick type (just plug and play). Besides that, I found out that this 2nd generation 4AFE is not as smooth and refined at high revs due to the master and slave cam system instead of belt system camshaft. You can hear the gear whine sound when you rev high above 4k rpm...

Anyways, I am still testing my FC after this fix. But based one the needle, it seems like there is no change. But I'll wait until the full tank is gone to get the accurate FC. Besides that, my idle is still unstable. If it goes one like that, I am suspecting that the wiring that goes from the O2 sensor to ECU has a problem and not the O2 sensor...

Headache and being poor because of this shitty FC...

 

[Dayline668]

New Myvi sensor costs RM180 only in Sabah. Okay... To explain the modification, it's like this.

Generally there are 2 shapes of sensors. The stick type where u just plug and play and the another more complicated type (stick with bracket). The Myvi is using the first type where u can just screw the sensor into the hole while my AE111 uses the second type where under the probe, there is a bracket (metal plate with 2 holes for screw attachments). So to let the Myvi sensor fit, all you have to do is just insert a metal plate and the bottom of the probe and then make 2 hole on each side of the metal plate (left and right) to screw it to the exhaust pipe. It's hard to picture... I'll try upload pictures when i'm free. I found one problem in doing this that is the surface area of the O2 sensor being reduces due to the space being taken up by the attached bracket. But it is just minor and the technician said that it is okay...

This is one weakness of the 2nd generation 4AFE engine. The sensors are different and difficult to source. Going for original UMW is insane. Most of the universal O2 sensor sold in the market today are the stick type (just plug and play). Besides that, I found out that this 2nd generation 4AFE is not as smooth and refined at high revs due to the master and slave cam system instead of belt system camshaft. You can hear the gear whine sound when you rev high above 4k rpm...

Anyways, I am still testing my FC after this fix. But based one the needle, it seems like there is no change. But I'll wait until the full tank is gone to get the accurate FC. Besides that, my idle is still unstable. If it goes one like that, I am suspecting that the wiring that goes from the O2 sensor to ECU has a problem and not the O2 sensor...

Headache and being poor because of this shitty FC...

LOL.. U did not test the O2 sensor is working or not after install..? giving the right signal..?:hmmmm:

 

[xMika]

I also want to check my o2 sensor edi .. 3sfe should be the plug and play type .. got alternative .. good ! Thanks btw ...

 

[Veloc]

LOL.. U did not test the O2 sensor is working or not after install..? giving the right signal..?:hmmmm:

I wanted to test... but the technician said no need. Sure ok =.=. So did not test... Haiz... Looks like the FC still same... If like that, I don't know what else is the problem now. The wiring from sensor to ECU shouldn't have a problem because the other day, the signal is inconsistent. If wiring problem, there should be no signal at all...

Damn ~