4G69 Bad Fuel consumption 30L/100KM

[cckeong]

My 04 stock 4G69 grandis engine have really bad fuel consumption.about 30L/100KM
I was send for replace TB,change new timing kit also the same problem.2nd gear was Sluggish.
Use BUD to check but no fault code....mechanic suggest change CO2 sensor and MAF sensor but no guaranty.End of Exhaust check was normal,no black smoke or white smoke.....
I have a copy of the BUD reading but I was told that need a PERFECT 4G69 Engine Data to compare....
So where to have PERFECT 4G69 DATA to compare?
So anyone can help on this?

[email protected]

 

[RENESIS VIII]

Try and send a PM to TitanRev. He should know a thing or two about Grandis.

 

[vr2turbo]

Wow! that is equivalent to 3.33km/l only. My turbo running 6.8km/l already considered bad, yours is worse.
Any petrol leak?

 

[cckeong]

No petrol leak.Send for 3 Mechanic no one can diagnosis the problem.
Even Mitsubishi Center also cannot find out the problem...
Keep on asking me change this and that but still cannot solve the problem.
OBDII also cannot trace out the problem...weird...

 

[Izso]

Paging Titanrev


Btw cckeong : This is totally random but did you check to see if you have any jammed brake calipers? That's what happened to me earlier and it really affected my FC and heavy emergency braking was really unpredictable.

 

[ixeo]

Engine rich will be black smoke.. so no smoke.. not running rich.. if o2 sensor faulty..should light up..reading off..would be rich..
If its over fueling, spark plugs would be fouled.. check spark plugs.. that's free.. then we eliminate it is due to the car running pig rich..

I think izso's suggestion is worth a serious look.

 

[gunnerzz]

last time my mech install my air filter duct incorrectly.
i didnt notice anything until i refill for fuel.
fc is bad but not terrible.

i only notice something wrong when i drive it a little harder amd the intake sound is higjer than usual.
after checking,it was not properly install causing the engine to suck hot air within the engine bay.

 

[TitanRev]

Grandis FC is really not good one. AT, heavy weight. You use a lot on city start/stop driving FC, is even more worse. There's nothing wrong with your engine from the pic you attached. Did you notice the gear change on the car always shift up very early? if you did, yes mine also like that. the early upshift also don't help to improve the FC also because you need too always keep shifting it down back again to have a bit more power. The engine itself is without VVT and it have MIVEC only. this made it nothing better to help improved the FC.
Also what engine oil grade you using? service enter will usually give you 15-50 try to go lower to 10-40. It made the car less sluggish and FC a bit that better. You running open pod or still stock air filter box?

Change timing kit improve FC? this I can't relate it to FC. FC probem you go back Service center also they cannot help coz the car when it roll out from Japan factory is already like this. That's why this Grandis sells in Japan itself also not very good....

 

[gunnerzz]

Grandis FC is really not good one. AT, heavy weight. You use a lot on city start/stop driving FC, is even more worse. There's nothing wrong with your engine from the pic you attached. Did you notice the gear change on the car always shift up very early? if you did, yes mine also like that. the early upshift also don't help to improve the FC also because you need too always keep shifting it down back again to have a bit more power. The engine itself is without VVT and it have MIVEC only. this made it nothing better to help improved the FC.
Also what engine oil grade you using? service enter will usually give you 15-50 try to go lower to 10-40. It made the car less sluggish and FC a bit that better. You running open pod or still stock air filter box?

Change timing kit improve FC? this I can't relate it to FC. FC probem you go back Service center also they cannot help coz the car when it roll out from Japan factory is already like this. That's why this Grandis sells in Japan itself also not very good....

regarding the timing belt kit.worn out timing belt tensioner do contribute to higher fc.
i experience it 1st hand on my waja.
in my case its worst by 2 km/l

 

[dkny]

Wow! that is equivalent to 3.33km/l only. My turbo running 6.8km/l already considered bad, yours is worse.
Any petrol leak?

Wat Turbo car u driving ?

 

[vr2turbo]

Wat Turbo car u driving ?

Evo's great great grand father model.....the VR4.....

 

[Solty8]

Since TS edi mention send for mech to test, almost everything, well spark plug n cable got check ? Since edi run OBDII and stuff I think will alert if spark plug is not in good condition ? But worth to change if it's been awhile never change or can check injectors ? Well how long is this car already ? And how was the previous FC ? IF previously good then suddenly bad, must be something wrong but if all along similiar then no choice. N btw, did you happen to change bigger size rim ? Or tyre ? Try to trace back what got changed b4 the bad fc kicks in.

 

[TitanRev]

regarding the timing belt kit.worn out timing belt tensioner do contribute to higher fc.
i experience it 1st hand on my waja.
in my case its worst by 2 km/l

Oh..I learn something..thanks for the info...

 

[ixeo]

So what's the conclusion? Share and see..

 

[^pomen_GTR^]

Grandis FC is really not good one. AT, heavy weight. You use a lot on city start/stop driving FC, is even more worse. There's nothing wrong with your engine from the pic you attached. Did you notice the gear change on the car always shift up very early? if you did, yes mine also like that. the early upshift also don't help to improve the FC also because you need too always keep shifting it down back again to have a bit more power. The engine itself is without VVT and it have MIVEC only. this made it nothing better to help improved the FC.
Also what engine oil grade you using? service enter will usually give you 15-50 try to go lower to 10-40. It made the car less sluggish and FC a bit that better. You running open pod or still stock air filter box?

Change timing kit improve FC? this I can't relate it to FC. FC probem you go back Service center also they cannot help coz the car when it roll out from Japan factory is already like this. That's why this Grandis sells in Japan itself also not very good....

Paging Titanrev


Btw cckeong : This is totally random but did you check to see if you have any jammed brake calipers? That's what happened to me earlier and it really affected my FC and heavy emergency braking was really unpredictable.

Wow! that is equivalent to 3.33km/l only. My turbo running 6.8km/l already considered bad, yours is worse.
Any petrol leak?

your vr 6.8km/l??? my boxer 6km/l only... :(


from the diagnostic screenshot looks like everything ok....just engine load seems like high? need service tps and clean the MAF sensor i think....

or perhaps the fuel pump controller not in good condition...


lastly if me i'll try flush the ATF...since mitsubishi AT box kind of manja if the ATF change not done properly....

 

[RENESIS VIII]

Grandis FC is really not good one. AT, heavy weight. You use a lot on city start/stop driving FC, is even more worse. There's nothing wrong with your engine from the pic you attached. Did you notice the gear change on the car always shift up very early? if you did, yes mine also like that. the early upshift also don't help to improve the FC also because you need too always keep shifting it down back again to have a bit more power. The engine itself is without VVT and it have MIVEC only. this made it nothing better to help improved the FC.
Also what engine oil grade you using? service enter will usually give you 15-50 try to go lower to 10-40. It made the car less sluggish and FC a bit that better. You running open pod or still stock air filter box?

Change timing kit improve FC? this I can't relate it to FC. FC probem you go back Service center also they cannot help coz the car when it roll out from Japan factory is already like this. That's why this Grandis sells in Japan itself also not very good....

Umm, then why did you get the car? Good performance?

 

[vr2turbo]

Umm, then why did you get the car? Good performance?

Comfortable people carrier.....hahhahahhahahha

 

[RENESIS VIII]

Comfortable people carrier.....hahhahahhahahha

Err, I think Estima and Alphard would do a better job than that? But I think those FC are worse than 4G69 since they are using V6....

 

[TitanRev]

Umm, then why did you get the car? Good performance?

They were doing promo and I went to survey Estima and Alphard before. Estima XR50 I was quoted around 180K-190K for a recond unit IINM year 2010-2011 with only 6 months to 1 year warranty. I viewed a few different places and most of the cars condition is not very bad but started to show sign of yellowing on headlights, minor cracks on headlights, chrome area fading..small small places, then I was ask that I need to fork another 4-5K to have the head unit change to local one. Interior wise most of the cars I viewed all are ok and very new. Mileage of the cars was average around 35-40K.

For Alphard I have a relative which own it, a 2.4 Version which he said the FC is not really good also. Plus the drive was very floaty he said it's like driving a bus. Vellfire on the other hand was more stable but the price range was out for me. The V6 is more powerful. I test drove the Estima 2.4 and its not really that powerful as its the same engine on the Camry my dad used to have. Renesis, both Estima and Alphard got 2.4L also not just V6. Estima got a 3.5L V6.

I choose the Grandis cause, it's a new CBU from Japan, price discount, comes with working 2DIN Kenwood touch screen player, DVD, reverse cam, TV, Ipod/USB port, Micro SD slot, Garmin GPS software..black leather interior (recon I saw mostly fabric and leather condition was not good for driver seat). 4G69 some parts are compatible with 4G63. The car has lower roofline and sits lower than an Estima, car felt more planted at speed. Not too common on the road also.

Honestly i don't know how good is the FC on an Estima but I think it's maybe a bit better than Grandis. If only grandis had sliding door like estima then it will be nice as I have encounter many times the rear doors very long so when I want to get my daughter off from her car seat I need to open the door wider so choosing parking space is a norm for me now.

There's still many things I chose the Grandis but can't remember all. Overall it's a good car, not the best I would say. Maintenance wise also ok for me. The car have plenty of rooms but doesnt make, the car feel bulky..it's quite streamlined. You can go search in motor trader you also will find very little on sale cause it's not much on the road..

 

[RENESIS VIII]

They were doing promo and I went to survey Estima and Alphard before. Estima XR50 I was quoted around 180K-190K for a recond unit IINM year 2010-2011 with only 6 months to 1 year warranty. I viewed a few different places and most of the cars condition is not very bad but started to show sign of yellowing on headlights, minor cracks on headlights, chrome area fading..small small places, then I was ask that I need to fork another 4-5K to have the head unit change to local one. Interior wise most of the cars I viewed all are ok and very new. Mileage of the cars was average around 35-40K.

For Alphard I have a relative which own it, a 2.4 Version which he said the FC is not really good also. Plus the drive was very floaty he said it's like driving a bus. Vellfire on the other hand was more stable but the price range was out for me. The V6 is more powerful. I test drove the Estima 2.4 and its not really that powerful as its the same engine on the Camry my dad used to have. Renesis, both Estima and Alphard got 2.4L also not just V6. Estima got a 3.5L V6.

I choose the Grandis cause, it's a new CBU from Japan, price discount, comes with working 2DIN Kenwood touch screen player, DVD, reverse cam, TV, Ipod/USB port, Micro SD slot, Garmin GPS software..black leather interior (recon I saw mostly fabric and leather condition was not good for driver seat). 4G69 some parts are compatible with 4G63. The car has lower roofline and sits lower than an Estima, car felt more planted at speed. Not too common on the road also.

Honestly i don't know how good is the FC on an Estima but I think it's maybe a bit better than Grandis. If only grandis had sliding door like estima then it will be nice as I have encounter many times the rear doors very long so when I want to get my daughter off from her car seat I need to open the door wider so choosing parking space is a norm for me now.

There's still many things I chose the Grandis but can't remember all. Overall it's a good car, not the best I would say. Maintenance wise also ok for me. The car have plenty of rooms but doesnt make, the car feel bulky..it's quite streamlined. You can go search in motor trader you also will find very little on sale cause it's not much on the road..

180-190k is way more than Grandis's price. Even if they do return better FC, the amount you saved for choosing Grandis over Estima should be able to cover up FC costs already. But what's with the head unit? You mean the audio/media player? Can't just use back the Japanese one?

For the 3.5 litre V6 variant, roadtax will be same like 350Z which is bloody expensive.

But I think one of the reason for Grandis's high FC is because it is using the old Mitsubishi Sirius (4G6x) series engine? That engine family is very old already. Since the days of old Mirage 4G61 around 20 plus years ago.

 

[TitanRev]

180-190k is way more than Grandis's price. Even if they do return better FC, the amount you saved for choosing Grandis over Estima should be able to cover up FC costs already. But what's with the head unit? You mean the audio/media player? Can't just use back the Japanese one?

For the 3.5 litre V6 variant, roadtax will be same like 350Z which is bloody expensive.

But I think one of the reason for Grandis's high FC is because it is using the old Mitsubishi Sirius (4G6x) series engine? That engine family is very old already. Since the days of old Mirage 4G61 around 20 plus years ago.

Japan head unit cannot use here mah...need to change or mod..but seldom ppl mod. FC high cause car also heavy la. The engine has long history but also evolved a lot...if u follow the US scene they like to take the 4G69 block and pair with 4G63 head to increase the CC making it a 4G693. Here also have but rarely people do it. I know a oversea forum guy who is documenting his 4G693 rebuild step by step very interesting thread and informative try to look for it.

 

[vr2turbo]

Japan head unit cannot use here mah...need to change or mod..but seldom ppl mod. FC high cause car also heavy la. The engine has long history but also evolved a lot...if u follow the US scene they like to take the 4G69 block and pair with 4G63 head to increase the CC making it a 4G693. Here also have but rarely people do it. I know a oversea forum guy who is documenting his 4G693 rebuild step by step very interesting thread and informative try to look for it.

Yah! different band width, but can get police reception....

Change head can increase CC?

 

[RENESIS VIII]

Japan head unit cannot use here mah...need to change or mod..but seldom ppl mod. FC high cause car also heavy la. The engine has long history but also evolved a lot...if u follow the US scene they like to take the 4G69 block and pair with 4G63 head to increase the CC making it a 4G693. Here also have but rarely people do it. I know a oversea forum guy who is documenting his 4G693 rebuild step by step very interesting thread and informative try to look for it.

I think the engine series had been discontinued now? Mixing 4G63 with 4G69. That concept is similar to how people do it here with 4G93 block + 4G92 MIVEC head, K20A head with K24 block and B16B/B18CR head with B20 block...

Yah! different band width, but can get police reception....

Change head can increase CC?

Use it to play music only... Then buy another cheap head unit for radio (if there is still space for it)

I think he meant 4G63 car changing block into 4G69. So, CC is increased?

 

[TitanRev]

Yah! different band width, but can get police reception....

Change head can increase CC?

Kacuk the block with head la....head 4G63 and bottom end is 4G69...

---------- Post added at 06:11 PM ---------- 6 hour anti-bump limit - Previous post was at 06:09 PM ----------

I think the engine series had been discontinued now? Mixing 4G63 with 4G69. That concept is similar to how people do it here with 4G93 block + 4G92 MIVEC head, K20A head with K24 block and B16B/B18CR head with B20 block...



Use it to play music only... Then buy another cheap head unit for radio (if there is still space for it)

I think he meant 4G63 car changing block into 4G69. So, CC is increased?

Yup, but hard to see 4G69 block...

 

[^pomen_GTR^]

180-190k is way more than Grandis's price. Even if they do return better FC, the amount you saved for choosing Grandis over Estima should be able to cover up FC costs already. But what's with the head unit? You mean the audio/media player? Can't just use back the Japanese one?

For the 3.5 litre V6 variant, roadtax will be same like 350Z which is bloody expensive.

But I think one of the reason for Grandis's high FC is because it is using the old Mitsubishi Sirius (4G6x) series engine? That engine family is very old already. Since the days of old Mirage 4G61 around 20 plus years ago.

just swap the engine into 4g63T la evo version.....got better power...lower roadtax...and better torque to carry loads around....

got kepish2 sound also