Ls 430 consuming too much fuel
01-15-18, 08:50 PM
#16
Driver School Candidate
Thread Starter
If there is some problem with the maf sensors or if is it not clean, will the onscreen meter will give me check engine tag or something else to notify me?.
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Safeer69 (01-15-18)
01-15-18, 10:58 PM
#18
Driver School Candidate
Thread Starter
are you sure this is gonna work? because i don't wanna experiment and then replace it anyhow later, i don't know what to do now.. let's see will try taking to some other garage. Hope this problem gets fixed
01-16-18, 12:19 PM
#19
Advanced
when the smell was also noticable in the cabin I took the car to the mechanic who found the location. It was the line going into the fuel rail and the immediate area was unusually clean
01-16-18, 12:20 PM
#20
I can help you make a decision.There is nothing wrong with using CRC cleaners on these two parts unless you are breaking it during removal/installation or actual spray application. It is very very important to avoid using strong chemicals on MAF sensor. Absolutely not. The one that was recommended to you is working just fine.Now, remember, if you MAF sensor is already going through severe aging problem, then the best bet will be to replace it. If I am not mistaken, you can purchase OEM (!) Denso made in Japan sensor on eBay from trustworthy seller for less than 30 dollars. As previously mentioned in other topics, the new sensor does a miracle to 3uz-fe if the old sensor was not effective anymore.
The following users liked this post:
Safeer69 (01-16-18)
01-16-18, 12:31 PM
#21
I can help you make a decision.There is nothing wrong with using CRC cleaners on these two parts unless you are breaking it during removal/installation or actual spray application. It is very very important to avoid using strong chemicals on MAF sensor. Absolutely not. The one that was recommended to you is working just fine.Now, remember, if you MAF sensor is already going through severe aging problem, then the best bet will be to replace it. If I am not mistaken, you can purchase OEM (!) Denso made in Japan sensor on eBay from trustworthy seller for less than 30 dollars. As previously mentioned in other topics, the new sensor does a miracle to 3uz-fe if the old sensor was not effective anymore.
01-16-18, 04:05 PM
#22
Lexus Champion
I can help you make a decision.There is nothing wrong with using CRC cleaners on these two parts unless you are breaking it during removal/installation or actual spray application. It is very very important to avoid using strong chemicals on MAF sensor. Absolutely not. The one that was recommended to you is working just fine.Now, remember, if you MAF sensor is already going through severe aging problem, then the best bet will be to replace it. If I am not mistaken, you can purchase OEM (!) Denso made in Japan sensor on eBay from trustworthy seller for less than 30 dollars. As previously mentioned in other topics, the new sensor does a miracle to 3uz-fe if the old sensor was not effective anymore.
How would you identify severe aging problems with MAF sensor as it relates to engine operation...
01-16-18, 04:55 PM
#23
Keep it simple. Let’s say you cleaned MAF sensor with some good chemical, installed it back and it still runs engine rich or lean if confirmed by the scan tool. Or, like what happened in my case, MAF had some dirt on it which could not be removed by spraying CRC. Replacing it solved a problem with idle hesitation and acceleration.
01-16-18, 08:38 PM
#24
Driver School Candidate
Thread Starter
I can help you make a decision.There is nothing wrong with using CRC cleaners on these two parts unless you are breaking it during removal/installation or actual spray application. It is very very important to avoid using strong chemicals on MAF sensor. Absolutely not. The one that was recommended to you is working just fine.Now, remember, if you MAF sensor is already going through severe aging problem, then the best bet will be to replace it. If I am not mistaken, you can purchase OEM (!) Denso made in Japan sensor on eBay from trustworthy seller for less than 30 dollars. As previously mentioned in other topics, the new sensor does a miracle to 3uz-fe if the old sensor was not effective anymore.
01-17-18, 04:30 AM
#25
Lexus Champion
P0100 - MASS OR VOLUME AIR FLOW CIRCUIT
P0101 - MASS OR VOLUME AIR FLOW CIRCUIT RANGE/PERFORMANCE PROBLEM
P0102 - MASS OR VOLUME AIR FLOW CIRCUIT LOW INPUT
P0103 - MASS OR VOLUME AIR FLOW CIRCUIT HIGH INPUT
Cleaning can be very effective if performed properly. There are 2 temperature elements that require thorough cleaning: The Temperature Sensor is located on the side of the MAF probe; and the Hot Wire located up inside of the MAF probe. The Hot Wire is difficult to reach and a random spray of cleaner is not enough to clean off the baked-on contaminates from the hot wire to restore the MAF's original performance. You really need to get up in there (without actually touching the hot wire, of course) with the spray. See diagram below...
Last edited by rkw77080; 01-17-18 at 03:05 PM.
01-17-18, 06:28 PM
#26
Lexus Champion
Driving conditions have a huge effect of "current gas mileage" calculated by the car's computer. For instance, today I pulled up to CVS drive thru for prescriptions. I notice my fuel gage was just slightly below the middle level and the current gas mileage was 17.3. I waited there in idle mode for about 5 minutes and noticed that the current gas mileage had dropped to 17.2. Heavy traffic while driving in town can have a significant effect on the calculated current gas mileage. By the way, I do agree that the cars calculate "current gas mileage" if acceptably accurate compared to calculations using actual distance and gas consumed when filled up.
09-30-20, 01:27 AM
#27
Driver School Candidate
Hi guys, i own a ls 430 of the year 2002,
Recently while driving i faced an accelration problem, whenever i pressed the accelerator the car didn't accelerate as it should and it would give me a petrol smell. With that i noticed my petrol guage is decreasing really fast. My range approx decreased 2 km on every half km.
I showed my car to the garage and he cleaned all its fuel filters, catalic, but nothing changed, after that he changed the knock sensors which worked with the acceleration, however my car is consuming the same amount of petrol.
Please can anyone help me with this problem because i cannot pay everything in the gas or to the mechanic.
Recently while driving i faced an accelration problem, whenever i pressed the accelerator the car didn't accelerate as it should and it would give me a petrol smell. With that i noticed my petrol guage is decreasing really fast. My range approx decreased 2 km on every half km.
I showed my car to the garage and he cleaned all its fuel filters, catalic, but nothing changed, after that he changed the knock sensors which worked with the acceleration, however my car is consuming the same amount of petrol.
Please can anyone help me with this problem because i cannot pay everything in the gas or to the mechanic.
i am seeing the same issue with my car how did it fixed ??
09-30-20, 01:37 AM
#28
Driver School Candidate
Thread Starter
it's either the ECU or the sensors, you can use an OBD scanner before consulting to a mechanic, they might squeeze your wallet to earn every penny they can.
Could be a single problem or a number of problems, this is a vast issue which needs a proper LS specialist.. for the starters do try a fuel injector cleaner - might be the debris in your tank (hopefully)
Could be a single problem or a number of problems, this is a vast issue which needs a proper LS specialist.. for the starters do try a fuel injector cleaner - might be the debris in your tank (hopefully)
09-30-20, 01:44 AM
#29
Driver School Candidate
it's either the ECU or the sensors, you can use an OBD scanner before consulting to a mechanic, they might squeeze your wallet to earn every penny they can.
Could be a single problem or a number of problems, this is a vast issue which needs a proper LS specialist.. for the starters do try a fuel injector cleaner - might be the debris in your tank (hopefully)
Could be a single problem or a number of problems, this is a vast issue which needs a proper LS specialist.. for the starters do try a fuel injector cleaner - might be the debris in your tank (hopefully)
10-01-20, 08:11 PM
#30
Lexus Champion
After 180,000 miles, cleaned MAF on 1999 LS400 to clear trouble code...
Highway mileage was good, however, decided to replace it with an OEM part..about $200. LS430 is about $100.
Immediately noticed improved part throttle response AND City efficiency improved noticeably.
Do not have exact figures to compare or share, but it was definite improvement.
As an interim step have an engine technician check engine vacuum readings at various RPMs...this should tell you whether your catalytic converters are clogged.
Last edited by YODAONE; 10-01-20 at 08:17 PM.
