ivan300 Posted October 4, 2009 Share Posted October 4, 2009 Hey guys i bought a 92 es300 a couple months ago. The car drives great however i am getting 13mpg in 90% city. I am babying it so it should be getting much better mpg's. These are the things i have done so far: - New Fuel filter - Spark plugs - Rotor/Cap - set timing to 17 - leaned out the afm 3 clicks - New o2 sensors - Checked the ecu there are no codes Any ideas what i should check/replace? Quote Link to comment Share on other sites More sharing options...
Sexus ES300 Posted October 5, 2009 Share Posted October 5, 2009 could try cleaning out the maf sensor with some electrical contact cleaner, it usually throws you a code if its not functioning correctly though but id say its worth a try its only about $5 for a can of it at radio shack. Also some people have had good success with sea foam, ive never used it but from what i heard it will clean everything out and improve mpg. Quote Link to comment Share on other sites More sharing options...
Lexusfreak Posted October 5, 2009 Share Posted October 5, 2009 Hey guys i bought a 92 es300 a couple months ago. The car drives great however i am getting 13mpg in 90% city. I am babying it so it should be getting much better mpg's.These are the things i have done so far: - New Fuel filter - Spark plugs - Rotor/Cap - set timing to 17 - leaned out the afm 3 clicks - New o2 sensors - Checked the ecu there are no codes Any ideas what i should check/replace? A couple more related (and inexpensive) tune up items to replace....the air filter & PCV valve. Is your tire pressure correct? Besides the spare tire & related items....any heavy stuff in your trunk? How many miles on the car? Quote Link to comment Share on other sites More sharing options...
George_Jetson Posted October 5, 2009 Share Posted October 5, 2009 A couple cans of fuel injector cleaner might help. Also you could check the ECM coolant temp sensor. (ECM uses a different sensor than the dash temp gauge). If the sensor is reading that the engine is cold, it adds extra fuel to the mixture. Quote Link to comment Share on other sites More sharing options...
ivan300 Posted October 5, 2009 Author Share Posted October 5, 2009 the 3vzfe has a mechanical maf which doesn't require cleaning. I checked it when I adjusted the afm and it was clean I forgot to mention that I replaced the PVC valve and the little gromet I checked the tire pressures 2 were at 30 and 2 were at 26. I put them all to 35. Though I doubt that would affect the economy that much the car has 146k miles and is an auto besides the normal stuff the trunk is empty the coolant temp sensor is a good idea.That could cause the ecu to be stuck in warmup enrichment mode. Ill have a look at it to Tomorrow Thanks for the help so far :) Quote Link to comment Share on other sites More sharing options...
Lexusfreak Posted October 6, 2009 Share Posted October 6, 2009 Let us know how it goes....where about's in Canada are you located ivan? Quote Link to comment Share on other sites More sharing options...
stcist2 Posted October 6, 2009 Share Posted October 6, 2009 don't forget the brakes! they could be dragging a little.. Quote Link to comment Share on other sites More sharing options...
Lucky13 Posted October 6, 2009 Share Posted October 6, 2009 Cleaning the throttle body would be worth looking into as well. Quote Link to comment Share on other sites More sharing options...
Lexusfreak Posted October 7, 2009 Share Posted October 7, 2009 Cleaning the throttle body would be worth looking into as well. That is a very good suggestion ^ Quote Link to comment Share on other sites More sharing options...
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