Gas comming out of the tail pipe check engine light does not come on.

Some fuel regulators are located in the tank as part of the fuel pump assembly. If the fuel pressure regulator has gone bad, it can leak fuel in the engine, contaminating the engine oil.

Symptoms of a bad regulator is:
Poor gas mileage.
Smell of gas in the engine compartment.
Fuel is leaking.
Black smoke coming out of the exhaust (tail pipe).
Failed emissions test.
Check engine light is on.

Charles, after searching the net., stuck injectors,faulty fuel pressure regulator or faulty ECU. Have a good Tech, check engine codes, diagnose and estimate repair. Check the attached links,instruction and guides, Good luck
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White smoke out of exhaust not what you think Club Lexus Forums
Es300 Smoking Bad And Gas Smell Help
http://www.automotiveforums.com/t967184-_93_lexus_es300_fuel_in_exhaust_runs_rough.html

check for clogged air filter and oxygen sensor if check eng light is on

Getting water in the tail pipe is a good sign as the engine will always have moisture when not running. Water on spark plugs is a bad sign as there may be a leak from a cracked cylinder head which is then a major job, the car should be running erratically or will stop.



To check if this is the case take out the oil dipstick and see if the oil is light brown instead of black then you have a problem as mentioned so needs major overall to the engine.

Check the trouble codes, and check that the catalytic converter is not plugging the exhaust up. If you bang on it and you hear rattling, it is probably bad. One way to verify is to run the engine with the converter disconnected from the exhaust. If it runs better, the converter is bad.

One of the main causes of white exhaust smoke and coolant loss is a cracked or warped cylinder head, a cracked engine block, or head gasket failure caused by overheating. A cracked head may allow coolant to leak into one or more cylinders or into the combustion chamber of the engine. Dirty coolant, a poorly maintained cooling system, a low coolant level, or a non-functioning cooling fan can cause engine overheating. In addition, engine wear can eventually cause the gaskets to lose their capacity to seal properly allowing internal coolant loss. Intake manifold gasket and head gasket failures are two of the most common sources of internal coolant loss caused by engine wear.


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Hi Dave,

I appreciate you asking mr to help you with your problem.
However, I am not really certain what you are describing here. Are you saying that you have RAW, UNBURNED FUEL coming out the tailpipe? Or are you saying that there is an excessive amount of LIQUID coming out the tail pipe and you are not really sure WHAT it is?

If the latter is the case, and you have a lot of white steam coming out of the tail pipe, you really need to check your engine coolant level. You could have something like a blown head gasket causing this. A blown head gasket will cause the engine to push engine coolant out the exhaust.

take it to AutoZone and get the code read. It will tell you where the problem is.
Sounds like the MAF sensor is bad

sounds like it running to rich of a fuel mixture, the first thing i would do is replace the oxygen sensor and also make sure its not misfiring an any cylinder, start there, hope this helps.

Don't drive it !!!! Don't START IT !! Have it towed to dealer or garage & have fuel system checked. Raw fuel is getting dumped into engine & could cause big problems, as well as a fire, or explosion.