Question about 1999 Lexus ES 300

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1999 es 300 runs very poor when raining I have replaced the spark plugs all the coils. mass flow air sensor and 2 knock sensors and gas cap.have spent close to $1000 still runs poor in the rain.

The car starts fine but when idleing wants to stall and also when your driving you are coming to a stop and the brakes get hard. plus engine light trac light and abs light are always on

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  • 139 Answers

Water getting in electrics somewhere lights perhaps or water in the fuel from hole somewhere in tank

Posted on Dec 12, 2014


6 Suggested Answers

  • 2 Answers

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Posted on Jan 02, 2017

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SOURCE: 96 lexus es 300 blinking check engine light

Hi there;

#4 Miss-fire. All the things you are saying make a lot of sense. When the light is blinking the cylinder is actualy misfiring, & the smell you are smelling is the fuel that is not burning in the engine burning in the exahst. This can cause a lot of damage to the exausht if it is not repaired..
There is still a couple of things that need to be checked, first he needs to check to see if it is possibly a fuel injector that is sticking. He can do this easily by moving the #4 injector to another cylinder & run the car. When it starts missfiring he will need to see if it is still #4 or if it is the cylinder that he moved the injector to. if it is the new cylinder it is obviously the injector, if it is still #4 he will need to look into the possibility of the EGR valve sticking open or some other issue to do with valve timing or low compression.
I hope this helps

Posted on Mar 17, 2009

  • 81 Answers

SOURCE: engine light

the dtc doesnt make sense. there should be a P0 or C0 in front of it. I'm going to assume that it was P0171 and P0172. mainly because those are related to the MAF relatively. Take it back to the mechanic who did the work. it sounds to me like he did something wrong.

Posted on Aug 23, 2009

  • 5370 Answers

SOURCE: My check engine and trac

Did you replaced the O2 sensors too.The O2 sensors are before and after catalytic converter. if an oxygen sensor goes bad, then your car will not pass smog, and have a very high emissions reading. The reason for this, is the oxygen sensor is responsible for reading how much oxygen to fuel there is in the exhaust, to determine if your car is running too rich, or too lean, and helps the ECU adjust properly. If the exhaust gas is determined to be too lean, your car would run too hot, and melt engine parts such as pistons and valves. If it's too rich, you are burning too much gas, so you could foul your spark plugs, and cause your car to have bad emissions. The rear o2 sensor, behind the catalytic converter, is simply responsible to ensure the catalytic converter is working, and could throw a check engine light if it is broken. ------------ If you have already replaced the O2 oxygen sensor then try cleaning the oxygen sensor with carburator cleaner.If the car is driven in too rich condition for long time then it can damage the catalytic converter too. --------- And for car not going in overdrive mode,the transmission has solenoids for the forward gears. Your solenoid for the overdrive may be at fault or the valve body piston is sticking shut.It has to be checked. There are two common problems that cause this transmission to not shift into overdrive if the check engine light is on or there is a code stored in the system it will go into default and not allow overdrive to occur. The other possibility is if the engine coolant is not reaching normal operating temperature it will keep if from shifting into overdrive for emissions reasons. If you can get to a nearby auto part stores such as AutoZone they do free engine code reads. It would be good to know to make sure that there's nothing set in the computer as far as engine codes is concerned. The only other possibility would be an issue in while the solenoids in the transmission but this is not very likely and is not very common.
This troubleshooting will help.Thanks.Helpmech.

Posted on Feb 02, 2011

  • 2359 Answers

SOURCE: ember engine light vsc light

VSC = vehicle stability control.
Before take it to the shop,do few car wash to clean out dirt around the ABS sensors.
The problem is not under the hood.
One or more ABS/TCS is giving out of range reading to the computer.
Clean the wheels and try again.

Posted on Mar 07, 2011

  • 3400 Answers

SOURCE: Rx 300 1999 I have

Have an OBII scan (fault scan) done. Scan will identify what triggered light. Any good parts store (Autozone, Advance, etc..) will do scan FREE

Posted on Mar 16, 2011

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1 Answer

03 Nissan Altima showing codes P0304,P0102,P0154,P0113 what are they and how do i repair the problems.

Hi Chris.

p0304 = Number 4 Cylinder Misfire Detected

Faulty spark plug 4
Clogged or faulty fuel injector 4
Faulty ignition coil 4
Fuel injector 4 harness is open or shorted
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Ignition coil 4 harness is open or shorted
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The P0304 code means that the cylinder 4 is misfiring or is randomly misfiring. Start by checking for intake leaks an if no leaks are found the next step is to replace the spark plugs on cylinder 4.

p0102 = Mass or Volume Air Flow Circuit Low Input

Faulty mass air flow sensor
Intake air leaks
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Mass air flow sensor circuit poor electrical connection

Before replacing the mass air flow sensor, try replacing the air filter and cleaning the air flow sensor with low compress air or mass air flow sensor cleaner.
Reset code and drive vehicle.
If the code comes back, it may be necessary to replaced the mass air flow sensor.

p0154 = O2 Sensor Circuit No Activity Detected Sensor 1 Bank 2

Faulty Front Heated Oxygen Sensor Bank 2
Front Heated Oxygen Sensor Bank 2 harness is open or shorted
Front Heated Oxygen Sensor Bank 2 circuit poor electrical connection
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Replacing the Front Heated Oxygen Sensor Bank 2 usually takes care of the problem.

p0113 = Intake Air Temperature Sensor Circuit High

Faulty Intake Air Temperature (IAT) sensor
Dirty air filter
Intake Air Temperature (IAT) sensor harness is open or shorted
Intake Air Temperature (IAT) sensor circuit poor electrical connection

The Intake Air Temperature (IAT) sensor is built into mass air flow sensor or in some vehicles mounted to the air filter duct housing. The sensor detects intake air temperature and transmits a signal to the Engine Control Module (ECM).The temperature sensing unit uses a thermistor which is sensitive to the change in temperature. Electrical resistance of the thermistor decreases in response to the temperature rise. The Intake Air Temperature signal is used as an input for various systems in the vehicle.

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Mass air flow sensor not working properly

hi no more sin, the camshafts have the variable valve timing, not the
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Mine has 217,000 miles. Has run great up until some time ago, when it started driving roughly only in wet weather. Now in dry weather, it starts fine, but drives roughly after warmed up (15-20 min) and...

The knock sensor NEVER causes a drivability problem. DO NOT change it. Instead, clean the MAF, Mass Air Flow sesnor that's on the air intake tube near air cleaner. It is coated with varnish. Spray with carb cleaner several times and gently, gently brush the wires. Theya re glass coated. Be careful.

Then disconnect battery for 2 hours and then reconnect and drive for 0 miles for computer to relearn engine contrils.

Also go here for more help

Dec 27, 2009 | 2000 Mercury Villager

1 Answer

Turns over but wont start

OK three essentials for a running motor......

1. Fuel - Check to ensure you have gas up to the engine. Check fuel filter, fuel pump and fuel injectors.
2. Spark - Make sure your system has electrical current to fire the plugs. Check your wires to the coil(s) the plug wires, cap & rotor and spark plugs and gaps.
3. Air - Check to make sure any air flow sensors are connected, most cars wont run with the MAF (Mass air flow) sensor disabled. Check your air filter to make sure its not dirty. if it is it can restrict air flow and cause your motor to flood its self out instead of allowing the gas to ignite, hope you found my answer helpful!

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1996 s10 2.2 engine starts but idles rough and will not rev up.

Hi! You must be frustrated by now! your code is marking that the O2 sensor is bad in bank 1. Did you replace the O2 sensor that is located  before the catalytic converter?  The S10 has an O2 sensor specially made for that cat. its about 30$ That would explain for your blackened spark plugs; your pc on the car is asking for more fuel. GOOD LUCK!!

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1999 Ford Taurus mechanical problem

your problem appears to be the idle control motor located on the air intake manifold it is a small motor that goes bad quite often. Other items that can cause this is a bad /clogged air filter or a tune up (spark plugs and wires), or clogged fuel injectors. to clean the injectors you can buy a container of fuel system cleaner and pour it into the gas tank and as you drive it cleans the system.

Once the fuel system is cleaned via a tankful of cleaner & gas then the idle controller motor would be next on the list to be replaced.

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I have a 1999 oldsmobile intrigue that is misting a lot. It idels rough, and runs rough. I can still take off it is a little slow, but I can still go pretty fast, but it still mist at the high speeds...

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