Petrol Smell Coming from Inside the Car

[freakdude]

Can you try one thing and update us : As soon as you start getting the petrol smell, park your car, open the fuel lid and then close it again. Drive normally to see if the smell fades away. Not sure if M800 has or not but there is a charcoal filter somewhere in the fuel tank or fuel lines that absorbs the fumes. If you constantly fill your car up-to the brim even after the autocut, then this may lead to damaged charcoal filter and hence the fumes.

freakdude.

 

[Varun560061]

But I get the smell usually when the tank is almost empty or 25% of fuel in the tank..

I usually never fully fill the tank...

 

[jarpickle]

Re: My Car - My Maruti 800

@Varun560061
If you are still facing low FE problems have you oxygen sensor checked.This sensor is responsible for sending the signals for the air fuel mixture.The new exhaust may differ in length from the old one and when this and back pressures change a slight drop in FE is expected and besides after getting an FFE am sure you drive your car all out which can be responsible for the further drop in FE

 

[Varun560061]

Re: My Car - My Maruti 800

Hi Jarpickle.. welcome to TAI.. good to know that you too own a 800..

Yes ,I am still facing low FE.. so is this the sensor which is fixed on the exhaust manifold ?
Can I swap this from my friends car and check it ? any other solution to get this rectified..

 

[jarpickle]

Yes it is located on in the exhaust manifold,the sensor is vulnerable to leaks and if there is a leak in your exhaust somewhere it will let air in and to compensate the sensor will send in more fuel in the air fuel mixture causing a rich mixture. So get the exhaust checked and then the oxygen sensor in that order.Ecu could be checked by a reputed tuner who is familiar with it.Many claim, few deliver.Also get the idle of your car checked.If you want to install a tachometer I would suggest one from the 3 cylinder A-star.I am using one in my car right now.The idle on my car is set to 900rpm(non a/c).For an A/c I believe it would be 1100+-50.You can adjust the FICD screw to adjust it.

Get a tuneup done.Change all your filters(air and fuel if you have changed the oil and oil filter recently) and get your injectors cleaned.I believe there is place in Bangalore a tvs service center where they clean the injectors.Get the spark plugs cleaned and checked, replace if needed.

 

[Varun560061]

Re: My Car - My Maruti 800

Thanks, As the header is new and custom made does it have an leak ?
I too have a a-star tacho but it blew off , so have you connected it to the ignition coil / ecu, here is the thread - www.theautomotiveindia.com/forums/a...s/4537-aftermarket-tacho-meter-rpm-meter.html

And about the filters, I have an K & n air filter, recently replaced the fuel filter,oil filter too. Spark plugs I have Bosch iridium plugs.

 

[jarpickle]

Re: My Car - My Maruti 800

New exhausts can have leaks too, if not welded properly.Most people here are in a hurry to finish the job fast so there are a lot of corners cut.Most probably if there is a leak before the portion where the oxygen sensor is the car will run rich and that can be identified by blue smoke and a blackened exhaust from the inside.Before starting the car take a cloth and wipe the inside of your endcan.If its black your car did run a rich mixture although for a small period.Have you ever gotten your fuel injectors cleaned, that would be a good thing to do as well.If you live in a dusty area, you should clean your K&n filter a little earlier than you would need to in a less dusty environment.

 

[Varun560061]

Re: My Car - My Maruti 800

I observe that now a days I find the exhaust tip blackened.. so is there any leak..
But there is no smoke..
I usually clean the air filter every 3 months. Even my car lags power between 80 - 110kmph..

 

[jarpickle]

Re: My Car - My Maruti 800

Get your air fuel mixture ratio checked and have you retained your cat con or eliminated it in your new FFE?Blackened inner in an endcan means your buring a fuel rich mixture, needs a bit of tuning.A good tuner will be able to address all these issues

 

[Varun560061]

Re: My Car - My Maruti 800

Thanks.. yes the cat con is removed.. but the new header has two cans..

Tuning ? I have got the timing and taped (sorry if I am wrong) adjustment done..

 

[jarpickle]

Re: My Car - My Maruti 800

Tuning as in getting the ecu adjusted and the re-mapped to use the free flow exhaust and air intake optimally.When you add a new intake system(k&n intake that you added) you are forcing more air into the system and to cope up with this the ecu will burn more fuel and the gases will be forced out faster due to your new exhaust system.The oxygen sensor sends the signal as to how much oxygen is passing, so leaks new the sensor also mean more air and then the ecu again sends more fuel so its burning more fuel(rich mixture) hence I asked you to check your exhaust for any leaks near the joints.And also get you ecu re calibrated to use all of your mods more suitably without burning more fuel.This doesn't mean lower the fuel to air ratio to make it lean which isn't any good either.
Raj Hingorani in bangalore is a tuner of high repute.
Raj Hingorani /Jameel
9901994525 / 9880201318

 

[Vishwas]

Note:Posts Moved

 

[jarpickle]

For the petrol smell I suggest you remove the card board covers from the inside portion of your car(interior)where the petrol filler cap is located, you will see marks left by the petrol that has come through when filling your car at the petrol station.Clean the area thoroughly and also check the petrol return pipe for pinching or leakages.

 

[Varun560061]

Now the issue has almost kind of solved, after I removed the container and closed the holes in it.. full detail in page 2..

 

[jarpickle]

Read the latter part of my explanation that is what causes the petrol to return to the filler neck.Check your return pipe.