1996 Saturn SL1 1.9L gas smell from exhaust and poor fuel economy
Manual transmission, while coasting and the clutch is depressed the RPMs raise rather than fall as it used to. I used to get between 450 - 550 kms per tank (280 - 350 miles per tank) with a max of 660 kms (415 miles) from one tank of fuel, and on my current tank I might get to 300 kms (190 miles) Have had engine codes 137, 134, 141, 171, 303, 1599, 1133 show up recently.
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Re: 1996 Saturn SL1 1.9L gas smell from exhaust and poor...
I DONT KNOW THE CODES OFF THE TOP OF MY HEAD BUT IT SOUNDS LIKE YOU HAVE AN EXHAUST LEAK AT THE FRONT OF THE EXHAUST SYSTEM AND THE OXYGEN SENSORS DONT KNOW ABOUT IT .IN TURN THEY ARE ADDING MORE FUEL TO YOUR SYSTEM BECAUSE TOO MUCH AIR IS GETTING SUCKED IN TO THE EXHAUST.
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Okay- thanks for the public announcement;...just kidding!
Mike it sounds like you have a heavy foot on the gas pedal- speeding around town- Ohhh, I gotcha' again! Or someone is pilfering your gas by siphoning it out; LOL
Okay, all kidding aside, the following issues can cause poor fuel economy:
Incorrect tire pressure
a bad or malfunctioning oxygen sensor
dirty or plugged air filter
dirty or malfunctioning fuel injectors
improperly working spark plug(s) e,g. misfires or improper gap
poor driving habits, like sudden accelerations
engine idling for inordinate or extensive amounts of time
and as silly or unbelievable as it might sound, the type of motor oil...the viscosity that is used can affect gas mileage by up to 10-12%; regular oil changes using synthetic or manufacturer recommended oil that reduces friction should be employed.
Defective coolant sensor
a leak in the intake manifold or EGR
Poor compression- If you are driving a car that has high mileage, over 100,000 miles, affects fuel economy
clogged catalytic converter or some other restriction in the exhaust system
slipping clutch or transmission
Lugging around excess weight in the car
Any single one of...or combination of the above, could greatly reduce engine performance and affect gas mileage.
www.bankrate.com/.../busted-fuel-economy-myths-save-gas-1.a... BankrateBut there are several long-held beliefs about fuel economy that can hinder .... real-world corporate averages (including manual trannies) average 30+mpg. .... The rpms even go up a little bit and I hear this ooooddinn everytime I change gears. ...seconds..the car responds instantly to the gas pedal (and is moving forward ...
If the fuel pressure regulator vacuum lines smell of gas the I would suspect that and replace it. If the MAF sensor or O2 sensors are faulty then that would change the air-fuel ratios and give you poor mileage.
Hello! The gas vapor system, which is under pressure, must be purged...Without the ability to purge fuel will not flow...This is the reason the engine will not idle...Because you smell gas vapors is an indication the vapor canis ter purge valve is either defective or has an open/broken vacuum line...Follow the vacuum diagram under the hood and trace all lines..."tired" vacuum lines will **** closed, replace any cracked, broken or soft lines...If this does not solve the problem replace the purge valve...See picture below...guru...saailer...
Sounds like you might have an oxygen sensor problem. Your catalytic converter(s) maybe defective or dirty. That in turn can dirty up the oxygen sensor. A defective oxygen sensor will send faulty info to the computer, interpreting the fumes as cold (even when the engine warms up). That causes the computer to adjust the fuel mixture to very rich, giving you poor gas mileage and the fuel smell. Hope it helps.
It sure sounds like a clutch problem, You describe needing more RPM's which indcates a slipping clutch. If the shifter goes into each gear but the car doesn't move your clutch is gone or the linkage is stuck or inoperative. hope this helps, Chuck