[Jaggu]

It might not be ICE. And instruct dealer to connect the scanner and do a thorough scan.

[VJ_MAVRICK]

Any updates Shuv? and as Jaggu pointed out, Get a full scan done and many a time such drops in mileage is due to clogged injectors or a catcon as per my knowledge goes.

[alankarmotor]

HI, after studying your entire case i would sugest to replace the air filter as in most of the cases of flooding the fabric of the air filter gets clogged which cannot be identified visibly. The other thing which i would sugest is to get D.T.C checked by a tech2 equipment for any fault code in the memory of the ECU. as there is a system in which even if the engine is started with any of the sensors disconnected for even a second and the sensor reconnected later on, the malfunction indicator lamp(M.I.L) would switch of and the veh will still work apparently ok but it now runs on fail safe mode . This many a times leads to a drop in fuel economy . Just get this erased from the memory.

Originally Posted by shuvc

As some of you would know, my car went through a pretty bad patch during last years monsoons. It got half submerged in the garage.

I got the car back around early November. Since then I've done around 5000kms with 12 tank top-ups. The general trend I'm observing is, FE has dropped by 1 to 1.5 kmpl (under both AC, non-AC conditions)

Let me clarify some obvious queries upfront.
1. Driving style has remained same
2. Driving route has been the same for the past 2 years
3. Car has done 28K+ kms now
4. It's been 5K + kms since the last service and there is no perceptible difference in the driving experience. It's same as earlier.
5. FE comparision done with same XtraPremium from the same station as earlier. Comparison is with FE figures over 2 yrs.
6. I always top up after using around 40-45 litres
7. Tyre pressure is maintained at 29psi and checked every fortnight.



Flood repair summary
1. ECM was not damaged and hence not replaced
2. All climate control dash electronics were replaced. Otherwise AC was fine.
3. Water did not enter the engine. Engine oil was replaced as a precaution.
4. Clutch was damaged. Whole clutch assembly was replaced.
5. Air filter, Oil filter was replaced
6. Gear oil was changed
7. Coolant changed
8. Spark plugs were changed and when I went with the FE complaint a month later, Maruti workshop cross checked the plug gaps, said they were not ok and altered accordingly. No improvement still.
9. Water in the exhaust was drained. As per Maruti, catcon is fine.


I was trying to think of what else has changed since the last time I got normal FE. ICE . The flood happened a week after installing the ICE.


Any pointers on possible explanations for the FE drop? Clogged injectors? Decarb required?

[razor4077]

Originally Posted by shuvc

ICE can contribute to 1kmpl drop ??

Now that's news to me as well!!!

Maybe you can borrow BlackPearl's catcon for a week to see if your catcon is the culprit?

[shuvc]

No updates yet. Am collecting all your inputs and will discuss them with my service guy in a couple of weeks - as and when I manage to go to the workshop for the 30K service.
@alankar, air filter was changed even though the one i had during the flood was not damaged, since I had removed it from the car and kept it at home.
@razor - thats an idea.
So as of now, 2 things to be done.
1. Scan, 2. Catcon

[shuvc]

Pollution control readings. There seems to be a lot of difference. What could this be due to?

Before, After
CO : .004, .019
HC : 1, 15
CO2 : 11.15, 4.93
O2 : .75, 11.63
Lambda : 1.047, 2.648
AFR : 15, 38

[filcord]

Please check wheel bearings, you may have increased rolling resistance due to rust in the wheels, differential, and other rolling/moving parts?

[shuvc]

Bearings where all checked IIRC.

Don't the pollution figures indicate that there's excess fuel/carbon in the exhaust?

[BlackPearl]

Originally Posted by razor4077

Maybe you can borrow BlackPearl's catcon for a week to see if your catcon is the culprit?

@shuvc - you can take mine to test

[shuvc]

30K service done on Monday, 3rd March.

Scan done. No issues there. Service engineer again reiterated that catcon is fine.

He thinks the plugs are to blame. Baleno OEM plugs are apparently of 2 varieties. A cheaper Champion plug costing around Rs. 50 apiece, and a more expensive NGK plug at around Rs. 150 apiece. The Champions have been replaced by the NGKs.

Originally Posted by BlackPearl

@shuvc - you can take mine to test

Thanks. Letsee how things go, for another month or two.

[JayD]

Originally Posted by gigy

shuv, i think your car is absolutely fine. since you have been tracking the FE so regularly till the ICE was installed, and after that the floods damaged your car. i believe you have a good ICE setup and it does take atleast 10amps of current minimum.(sorry didnt check your setup). where is this power coming from? from the alternator-from the engine -from the fuel. we all ignore but its a universal fact.(energy can neither be created nor destroyed). 1kmpl for your ICE.so you have answered the cause in your first post itself.

Then a certain Hydra down south should be driving in flintstones mode!

Seriously, i think its the exhaust, what better excuse do u need to get an FFE buddy??

[1100D]

Originally Posted by shuvc

Pollution control readings. There seems to be a lot of difference. What could this be due to?

Before, After
CO : .004, .019
HC : 1, 15
CO2 : 11.15, 4.93
O2 : .75, 11.63
Lambda : 1.047, 2.648
AFR : 15, 38

Were both these readings taken under similar conditions of prior vehicle usage? Or is it a case of the "after" reading being taken on a cold engine.

If under same conditions:-

I would start looking at the Injector side, (solenoid) or the AFR itself. As the AFR shows you are running lean. But the CO readings increase (supplemented by the decrease of the CO2 reading) means that you are not burning the fuel completely. Somethings definitely fishy.

[1100D]

Originally Posted by 1100D

or the AFR itself.

Sorry I meant the Lambda sensor! Wrote AFR!

[dinu2506]

Why don't you try an engine decarb since the engine has already done 30000km

[gigy]

So Shuv, have you completed all the recommended servicing?
oil, air,fuel filter change, decarbonizing, throttle body cleaning, catconverter change, wheel bearing change,ac servicing. if nothing has helped till now can you for me redo the check once more by removing the fuse of amplifiers.just run in old ICE setup or if that is not possible remove fuse and run for say 500kms and give your observation please.