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Dan
Dan, Technician
Category: Lexus
Satisfied Customers: 23589
Experience:  Independent Shop Experience, 2 Year Automotive Diploma, & Access to Information Database
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1999 rx300 is pulsating ( power / chocking ) notice that the

Customer Question

1999 rx300 is pulsating ( power / chocking ) notice that the temp gage is very low whether just started or running a while
Submitted: 1 year ago.
Category: Lexus
Expert:  Dan replied 1 year ago.

Hello, my name is***** the actual heat seem cooler then usual or the same? Thanks.

Customer: replied 1 year ago.
Well haven't needed heat but the console is "making noise " gurgling
Expert:  Dan replied 1 year ago.

That would point toward low coolant level which would also cause gauge to go low. Coolant shouldn't disappear so this would mean you probably have a small coolant leak somewhere. Start by adding coolant to see if that takes care of problems, if so next step is finding leak. You can use dye and a pressure tester to find leak. Let me know how it goes or if you have more questions, thanks.

Customer: replied 1 year ago.
The coolant level is not low
Expert:  Dan replied 1 year ago.

If coolant is not low then I suspect problem with either thermostat or coolant temp sensor. Give me a few minutes and I'll send pictures of both, thanks.

Expert:  Dan replied 1 year ago.

The coolant temp sensor is located on the front top of engine with 2 wires going to it. One is brown and one is green/white. Let me know how it goes or if you have more questions, thanks.
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https://www.dropbox.com/s/2txwvpor79rf5tl/rx1.pdf?dl=0
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https://www.dropbox.com/s/bd8qp60k6t8an9c/rx2.pdf?dl=0
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https://www.dropbox.com/s/0lqy66ojscngiq9/rx3.pdf?dl=0
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Customer: replied 1 year ago.
Ok found the sensor w the brown n grn wht wire it is in where I assume the thermostat sits where the hose from the radiator come in. The auto parts place gave me one with a 19mm wrench size n the one that has the colored wires u gave me looks like a 17mm naturally I'm not at my garage where I have all my tools
Expert:  Dan replied 1 year ago.

Good to hear you found sensor, let me know how it ends up turning out or if you run into more questions. Thanks.

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