93 lexus es300 has a white blue smoke coming out the muffler smells like gas really strong i was told it might be the ecu or possible fuel pressure regulator any help would really be appreciated

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

The most common cause of blue exhaust smoke is oil leaking past engine seals and into the cylinders where it then mixes and burns with the fuel. Oil leaking into the cylinders can cause a rough idle, misfire and fouled spark plugs. So best bet is to have a local repair shop inspect for internal oil leakage.

White smoke usually indicates water in the oil.
You should pull your oil dipstick and see if you see water bubbles on the stick

Btw, I’m available to help over the phone in case u need at https://www.6ya.com/expert/jason_77a19afa8d604dee

possibly your O rings which isolates fuel injectors from engine block are getting old and letting gasoline go out. it is very dangerous since it can cause fire. do not drive.

another cause is broken loose or cracked fuel lines. this is equally dangerous since it is under hood close to hot exhaust manifold.

if smell is from exhaust manifold, which means not the smeel of gasoline but exhaust fumes, this can be caused by broken exhaust manifold or a crack on it or problematic exhaust manifold gasket.

White smoke (steam) indicates antifreeze burning in the cylinder, or trying to, check again to see if it's blue tinted smoke,(almost looks white, but has a tint of blue, and it lingers in the air a lot longer) check the radiator level, and a compression check will determine the condition of each cylinder, evaluate the spark plugs, (there are charts on line) (this determines if the air fuel mixture it correct) let me know what the out come is.

The same thing happened to my 2003 ES300 - the smoke is coming from the oil seeping into the motor's cylinders. This is the classic "Oil Gelling" problem in Toyota and Lexus vehicles. There is a factory recall on it, but it only covers to 2002 ES300 not 2003. The Lexus dealer confirmed my "oil gel" problem and went to bat for me with Lexus - they got the repair approved - Thank you Mr Local Lexus Dealer! The cost was nearly $4,000 - paid for by Lexus.

your piston ring could be goin bad

Have you overheated or are loosing coolant? If not check to see if your transmission has a vacuum hose going to it. (if coolant you can smell it in the exhaust)
I don't think you have the trans hook up but can't remember.

It's the ECU. Very common with the early '90s lexus cars. Everyone will say head gasket, but unless your oil is milky white, it's not coolant leaking into the cylinder.
Buy an ECu on ebay for less than $100, it plugs in under the dash, just like a computer printer. Easy fix.

well first the white smoke indicateds water in fuel system. if you have a strong fuel smell that would indicated that your getting way too much fuel. there are several reasons for this. it could be that the fuel pressure regulater is malfunctiong. the throttle position sensor is bad. it could also be a timing issue.