philliptie

iTrader: (1)

i have an sc400 1992 with 170K miles. And smells like gasoline when the car is running. and it smells like that about instantly smell like gas.
lately the check engine code is throwing me 24, so i knew something is wrong with the mafs.

I then purchased a used one and installed it and before i reset the ecu i recieved engine codes 24 and 31 now (iat and mafs).

So after i reset the ecu no codes are thrown at me.

Now I started it again and STILL the smell of gas...

Can anyone give me some ideas?? thanks

philliptie

iTrader: (1)

I love it how no one here has any advice....

stevechumo

iTrader: (5)

Give people some time. The first thing when you think it runs rich is to take out the spark plugs and see if all 8 are rich (black smoke and smelly gas) or just some of them are rich. Some injectors may get stuck open. If the ECU is ruled out because of the same symptom after it's replaced, then check fuel pressure regulator. Then we'll go from there.

masagsxr

Do a tuneup... cap, rotor, plugs and plug wires. Clean EGR, seafoam lines and set the timing.

Nick T

Phillip,

Have you checked for physical gas leaks ? Check around the fuel injectors for leaks. A Clogged air filter will make the car run rich, like stevechumo and magagsxr said, do a tune-up, when you pull your spark plugs, check their condition. Take pictures if you have to. Post back.

Luck

BostonSC4

iTrader: (2)

Phillip,

Unplug your MAF sensor and see how the car runs. If it runs good, which you will smell gas then that means its more than likely the problem. I would try replacing the MAF.

6SOARER

iTrader: (20)

Does it smell like RAW gas or exhaust gas? If it smells like RAW fuel, look for a fuel leak. But, if it smells like exhaust gas after the repairs and no codes are present it maybe your Catalytic converter. You said you had around 170k miles, if its the original converter it maybe SHOT.

I have a little over 190k miles on my car with the original CAT and that **** stinks. Im not replacing it cause it still passes inspection and it doesnt bother me that much..

philliptie

iTrader: (1)

it smells like exhaust gas, and its instant, right when i start the car.

Biddles

iTrader: (2)

I'm bumping this thread because I have the exact same problem. Same codes being thrown, and the strong smell of gas. Cel 24, 31. Any other advice here appreciated. The car started for about 5 seconds and puttered out.

OG Dada

iTrader: (10)

Worth checking, dealt with this for a year before I sold my 400.

https://www.clublexus.com/forums/per...-sensor-3.html

ihiryu

iTrader: (7)

I would pull the ECU and check for leaking capacitors....

Biddles

iTrader: (2)

Awesome info, thanks a lot man! I don't know if this will fix my issue, but I think my problem is electrical and running the same CEL's you had gives me hope. If it wasn't raining I'd be out there troubleshooting, now I got my weekend planned.