Question about Acura TL

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I replaced the egr sensor on a 99 TL, however the light came back on. I've been told that I need to clean out the intake however the intake manafold is no where near the sensor. What is it that I need to clean and what is the best thing to clean it with?

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  • wesleyhair Sep 10, 2009

    Do I just spray the cleaner down the opening in the intake because it appears to be a 90 degree angle? If so how far down the intake do I need to go with the hanger? I'm I better off removing the intake cleaning it and getting a new gasket to put back on?

  • wesleyhair Sep 10, 2009

    Thanks for the help will give it a go tomorrow. will let you know the results

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The problem these cars have is that the exhaust gas passages get clogged with gunk and soft carbon from the gas flowing through the passage, this gives a sensor code, so yes u need to clean the passage in the intake for the EGR gases, use carb spray and a piece of wire, a coat hangar works well, also rebar wire, often called bailing wire, u may be able to clean them out that way, if the carbon deposits are hard then u may have to have the intake cleaned by a machine shop, u will need compressed air to have any chance of success.

Posted on Sep 10, 2009

  • yadayada
    yadayada Sep 10, 2009

    you use the coat hangar 1st at the egr valve end of the passage, then spray and let sit for a few minutes repeat as ness to clear, there is no set procedure i have found to clean these out, just do whatever is needed to clear the passage, like i said i have sent many out to machine shop to be boiled out with carbon cleaner (done a 100 or so over the last 25 years).

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1 Answer

Check engine light on because egr


did you scan it? in USA? we can easy, with any new Scan tool.
by new , i mean not 1996 tool.
the MPI engines all have this air box, at the start of the intake air tunnels and below (behind) the throttlebody.
There are like 10 EGR systems, and some times non at all , new jeeps for example.
it varies by engine type. you car can come with more than one
engine as an option, so before working on any engine, ID it, find out
which engine, it might be (99% of posters here dont say)
btw , if you login to alldata.com it will show the EGR.
as will the Acura FSM for your car.
they show all the tests, but most FSM never show the #1 cause
carbon packup.
there are 2 basic types, vacuum and electric controlled, newer cars
are all electric, (egr motors)
I log in and look for TL
the TL has and egr lift sensor, that gives feed back
so using the scan tool , it would tell you a DTC error, that says
feedback fails, (that means the valve is carbon packed or input bad)
so many engines, there, and so many EGR variants
Generic answer no engine:
the EGR fails, DTC #P040x
usually do to EGR mail or its full exhaust path blocked in carbon.
or 1 or 2 EGR sensors bad.
or the controls that control it , vacuum and or electric are dead.
or the engine has huge air leaks ,causing one EGR sensor to fib.
that covers it.
tell country , tell engine, and there is hope.

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