Question about Lexus LS 400

1 Answer

My 96 ls400 was garaged for 4 yrs. with little gas in the tank. Now, the car was very rough. I have replaced all plugs and wires. Still rough. I got code PO300. Misfire on 1,2,3,5,6,7 cylinders. What could it be the problems? Could it be the injectors. I wanted to replace the fuel filter, but where it is located at?

Posted by on

  • jtndevelopme May 25, 2011

    Before the car was stored, the car runs smooth, no problem at all, Do you think it could be the injectors? If I try to clean the injector with Castle FireBall, how much do I need to use?

×

1 Answer

  • Level 2:

    An expert who has achieved level 2 by getting 100 points

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

    Vice President:

    An expert whose answer got voted for 100 times.

  • Expert
  • 142 Answers

First. Storing anything that is Gasoline powered for a long time ( typically over 6 months) should have a full tank of fule with Stabil or simmilar product in the tank and fog the engine. ( inducing a engine fog according to product lable)
As for your car I show that the Lexus LS400 has no external fuel filter. ( Poor Choice by Toyota in my opinion) the only filter that AllData shows for your car is in the fuel tank. If you have not *** of yet. I would find a place that sell Castle FireBall. It is the best injector and fuel system cleaner I have found. Try that first. If no luck you may have to try a professional injection cleaning. That would be my first try, if you have ruled out vacuume leaks. Letting a car sit can also cause dry rot of vacuume lines. Look it over good. Spray carb cleaner while engine is running on vacuume lines and see if you hit a spot where engine smooths out. if so that is a sure sign of a vacuume leak in that area.

Posted on May 24, 2011

Testimonial: "Thanks for the tips. I will try to use the injector cleaner and see what will happen. So far, I could not locate Castle FireBall. "

1 Suggested Answer

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

Hi,
a 6ya expert can help you resolve that issue over the phone in a minute or two.
best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
goodluck!

Posted on Jan 02, 2017

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

1 Answer

I just purchased in 1999 Honda CRV DX, it had been sitting for a couple of years put fresh gas in plugs and changed oil, and it is running a little rough still. I'm thinking of doing new wires .'


I recommend changing the fuel filter, air filter, and adding Seafoam Fuel System Cleaner into the gas tank to clean the injectors as well as replacing the wires.

Jan 17, 2017 | 1999 Honda CR-V

1 Answer

What causes a rough idle when in gear at a stop


There are a few things that can cause this.
1 running your gas tank too low -junk in the gas clogs the gas filter -easy cheap fix
2 the idle could be off too much air or gas on the mixture going into the carb.
3 Timming. this should be done twice a year or so -need timing light -any garage can check it.
4 Need new spark plugs and or wires.
Start with these then see what happens.

May 15, 2014 | Plymouth Scamp Cars & Trucks

1 Answer

Running rough


Put some premium or high test gas in the tank and a can of Seafoam. Take it out for a good drive. Sitting for a year or so will cause the old gas to varnish in the fuel lines and injectors. Whyen you park it again, make sure there is NO regular gas in it. Regular gas with ethanol will create havoc with an engine that sits. It makes water.

Jul 04, 2013 | 1994 Cadillac Fleetwood

1 Answer

Could a faulty fuel pump make your tach start bouncing lower suddenly and run rough than not want to start. Spray some starter fluid and fires up runs fine sometimes.


It sounds like you may have gotten a little water in your gas. Or sometimes if you run an older model car out of gas or real darn close to empty you can get dirt and debris that lies on the bottom of your gas tank sucked into your injectors. I would first try buying a high quality fuel treatment from the auto parts store and adding it to the gas tank during your next fill up. Also check and see if it's time to replace the spark plugs and plug wires.

Mar 28, 2011 | 1995 Honda Accord

3 Answers

Driving 60mph power drops as though out of gas. Coast 2-300 yds pump gas pedal van back to normal. Now at home it starts then stalls, will only run 5-10 seconds. New plugs&wires distributor cap and...


signs of a bad fuel pressure regulator. the vehicle runs rough, the engine will not start usually in the mornings. many times engine starts but stalls shortly after starting. a bad regulator can result in fouled plugs. black soot on plugs, blake smoke from tailpipe, running rough, stalling. you could have residue in fuel tank and need to change fuel filter again. have a very good day !!

Mar 09, 2011 | Volkswagen Eurovan Cars & Trucks

3 Answers

Hi, my 1996 pontiac 3.1 just got the service engine light went on along with rough idle. Took it to a auto store they hooked it up and said that cyl 4 miss fired. Any ideas. Tune 6 months ago full tank...


either injector, or plug wire or plug-I'd vote for for the plug wires first, and you can check the injector by using a broom handle and holding it against the suspect injector-see if it clicks while the engine runs. Compare it to others to see if it sounds the same. You might also remove the plug and see if it is wet (bad plug wire) or dry (injector, possibly).

Feb 28, 2011 | Pontiac Grand Prix Cars & Trucks

1 Answer

1006 town & countrydisconnect fuel tank wire connector


Drop the tank check the fuel sock it is plugged or the fuel pump is bad, check the pump, also did they have a blowout? Check the blowout reset button to see if it popped out for some reason.

Jun 20, 2009 | 2005 Chrysler Town & Country

Not finding what you are looking for?
Cars & Trucks Logo

Related Topics:

223 people viewed this question

Ask a Question

Usually answered in minutes!

Top Lexus Experts

yadayada
yadayada

Level 3 Expert

75822 Answers

ROBERT GARCIA
ROBERT GARCIA

Level 3 Expert

881 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

22156 Answers

Are you a Lexus Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...