Problem, slow acceleration, high fuel consumption!
07-13-18, 04:15 AM
#31
Two thoughts come to mind for me. One, is one of the brakes dragging. Two, is the computer staying in open loop, because the coolant temperature sensor isn't working correctly. That makes more sense to me after everything that has been checked already. If the O2's were responding so slowly as to loose six or more Mpg's it would have thrown a code for slow response. I've had pending code for slow response, and was only getting about a 1 mpg loss.
A normal test is to richen the system up and see if the sensors respond correctly. By adding a controlled amount of additional fuel ( like propane) and looking at the data one can tell if the sensor is detecting correctly. The question is are they transmitting the true data? Are they bias in one direction or the other is the point I was trying to make.
07-13-18, 04:43 AM
#32
08-12-18, 07:38 AM
#34
Driver School Candidate
Thread Starter
The concern with the o2 I was talking about is corrupt data. If the o2 is sending incorrect data the fuel mileage will be off. If the o2 is working but weak yes it will set a slow response code, but if its bias in one direction it will not set a code. A much-overlooked concern on this system as these are really Air Fuel ratio sensors and work a little different than a typical o2 sensor.
A normal test is to richen the system up and see if the sensors respond correctly. By adding a controlled amount of additional fuel ( like propane) and looking at the data one can tell if the sensor is detecting correctly. The question is are they transmitting the true data? Are they bias in one direction or the other is the point I was trying to make.
A normal test is to richen the system up and see if the sensors respond correctly. By adding a controlled amount of additional fuel ( like propane) and looking at the data one can tell if the sensor is detecting correctly. The question is are they transmitting the true data? Are they bias in one direction or the other is the point I was trying to make.
08-12-18, 03:45 PM
#35
Or buy one of these scanners from China off ebay https://www.ebay.com/itm/NEW-Scanner...YAAOSwBgVa4ZK-
08-13-18, 10:29 AM
#36
Pole Position
These generic scanners are quick and easy to use. BUT they only read generic codes, not Lexus/Toyota specific codes. I would spend a little more (maybe as little as $10) and get something Lexus/Toyota specific. Here is a post about what other people have done: https://www.clublexus.com/forums/sc4...solutions.html
08-13-18, 06:53 PM
#38
These generic scanners are quick and easy to use. BUT they only read generic codes, not Lexus/Toyota specific codes. I would spend a little more (maybe as little as $10) and get something Lexus/Toyota specific. Here is a post about what other people have done: https://www.clublexus.com/forums/sc4...solutions.html
Apologies for temporarily taking the thread OT...
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