snaylor07 Posted June 10, 2009 Share Posted June 10, 2009 I bought my 1999 RX300 about 4 months ago, and it ran perfectly until a little while ago. I commute about 80 miles just about everyday. The engine is losing oil quicker than it should. The engine knocks, and the knocking speeds up and becomes louder as I accelerate, but goes back to a steady, more quite knock as soon as I let off the gas. Plus today my starter made that awful noise like when you try to start your car after it's already running, but it was the first start. .....I don't know. What I do know is that I am tired of buying oil every week... Quote Link to comment Share on other sites More sharing options...
lenore Posted June 11, 2009 Share Posted June 11, 2009 You may have a sludged engine. Have the front valve cover removed and see if it is clean or full of a jelley gooey crap. Unfortunately you are past warranty for this problem (8years 120 days) As for the starter you may have a shakey battery. What is your mileage on the vehicle and do you have maintenance records.? Quote Link to comment Share on other sites More sharing options...
blueridge Posted June 11, 2009 Share Posted June 11, 2009 I bought my 1999 RX300 about 4 months ago, and it ran perfectly until a little while ago. I commute about 80 miles just about everyday. The engine is losing oil quicker than it should. The engine knocks, and the knocking speeds up and becomes louder as I accelerate, but goes back to a steady, more quite knock as soon as I let off the gas. Plus today my starter made that awful noise like when you try to start your car after it's already running, but it was the first start. .....I don't know. What I do know is that I am tired of buying oil every week... Need more information, please post your mileage, any engine maintenance that has been performed, that is due, or over due. Have you had any check engine lights recently? If so, what codes? Also, what gas octane and company name are you using? Some of the things that could be causing this are: 1) Cheap gas 2) Knock sensor(s) going bad 3) Spark plugs need changing or were replaced with non OEM Denso or NKG's. This engine has a tendency not to like non OEM iridium plugs. I had similar problems and after a few months of trying various grades of gas companies, octanes, cleaners, etc. I started to get the P0330 code which is a knock sensor. I also changed back from Bosch Fusion plugs to OEM Denso IR and that helped some. As for the oil consumption, are you having any smoke coming out of the exhaust? If so and it's blue that is a problem. Pull the front engine valve cover to rule out engine sludge. These engines have a history of making sludge and have a 8 year warranty on they via a class action lawsuit. Also check the ground and undercarriage for leaks. If it's not being burnt it's coming out of the rear main seal, crankshaft seal, or some where else. Quote Link to comment Share on other sites More sharing options...
snaylor07 Posted June 11, 2009 Author Share Posted June 11, 2009 It has close to 195,000 miles, but only one other owner than me. There are no leaks of any kind under my car, and there is no smoke coming out the exhaust. I try to get BP Amaco fuel, 87 octane. I just had an engine light come on and had it deleted for cylinder misfire on 2, 4, and 6, and since then it has never come back on(about a week). I bought my 1999 RX300 about 4 months ago, and it ran perfectly until a little while ago. I commute about 80 miles just about everyday. The engine is losing oil quicker than it should. The engine knocks, and the knocking speeds up and becomes louder as I accelerate, but goes back to a steady, more quite knock as soon as I let off the gas. Plus today my starter made that awful noise like when you try to start your car after it's already running, but it was the first start. .....I don't know. What I do know is that I am tired of buying oil every week... Need more information, please post your mileage, any engine maintenance that has been performed, that is due, or over due. Have you had any check engine lights recently? If so, what codes? Also, what gas octane and company name are you using? Some of the things that could be causing this are: 1) Cheap gas 2) Knock sensor(s) going bad 3) Spark plugs need changing or were replaced with non OEM Denso or NKG's. This engine has a tendency not to like non OEM iridium plugs. I had similar problems and after a few months of trying various grades of gas companies, octanes, cleaners, etc. I started to get the P0330 code which is a knock sensor. I also changed back from Bosch Fusion plugs to OEM Denso IR and that helped some. As for the oil consumption, are you having any smoke coming out of the exhaust? If so and it's blue that is a problem. Pull the front engine valve cover to rule out engine sludge. These engines have a history of making sludge and have a 8 year warranty on they via a class action lawsuit. Also check the ground and undercarriage for leaks. If it's not being burnt it's coming out of the rear main seal, crankshaft seal, or some where else. Quote Link to comment Share on other sites More sharing options...
lenore Posted June 11, 2009 Share Posted June 11, 2009 what code did you get? Quote Link to comment Share on other sites More sharing options...
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