3.0L to 2.5L advice and comment needed

[weikee]

I always do 5,500 rpm before change gear :)

 

[how2drive]

thanks for the info on the power/snow switch... i will just leave it at the center and let it run haha. So far my ride seems to be guzzling up fuel quite fast. At the first quarter mark, i m only doing around 90km mark where else during my 3.0 days i get around 160 on the first quarter mark. Maybe different meter shows different reading, will see how far the mileage goes when the tank goes dry :hmmmm:

 

[ctk22]

My VQ25 drinks more fuel than my previous VQ30 in city drive

 

[weikee]

it should be around the same.

 

[how2drive]

What are the mileage do u guys get on your VQ25 for city driving? Mine is seriously drinking fuel like its happy hour. Full tank of city drive i get only 330km :(

 

[dream.tent]

Wow 330km/tank! My VQ30 doing 400~420km town driving woh...better have it check..

Maybe O2Sensor kuku-ed or leakage at the manifold causing the high FC.

 

[how2drive]

yup getting it checked soon, noticed the mileage is very bad compared to a lot of other 25 or 30. Sigh. Will also look into the o2 and manifold... thanks Dream :)

 

[doraemon98]

There is a trick to calculate FC in a more accurate way.

First, fill up your tank until the pump gun auto stop.

Reset your trip meter to 0. Then drive as usual.

Anytime you can fill up your tank again with the very same pump (very important! not all pump stop at the same triggers.) as step 1. Say you refill your tank at 280km for 30 litres.

Calculate FC by 30litres/280km. You will get your FC in litres per km.

This method, you dun hv to dry your tank before refill to calculate FC.

 

[ctk22]

Wow 330km/tank! My VQ30 doing 400~420km town driving woh...better have it check..

Maybe O2Sensor kuku-ed or leakage at the manifold causing the high FC.

Dream.tent, does manifold leakage produces sound? Like hissing sound? I suspect mine might have some problem

 

[weikee]

sound like vacuum leak. which manifold? exhaust or intake?

 

[how2drive]

suspect my manifold has a leak too.... during normal drive, i tend to hear a slight hissing sound.

Advisable to use liqui moly injectors cleaner to clean my injectors since i just transplanted the engine?

 

[weikee]

Maybe just the exhaust joint.

 

[sb3]

I've taken Weikee's great advice to service my AFM and boy I can feel my car milleage improved alot! Thanks bro!

 

[ctk22]

service? how and where?

 

[weikee]

Glad it solve your problem.