Question about Lexus SC 400

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It is a v8. i am loosing power and catalytic converter gets cherry red. i had replaced all three converters and still having the same problem.

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Check the EGR valve and the oxygen sensor.
Either can cause problems with fuel mixture.
Run a computer diagnostic on the vehicle; the onboard computer knows what's going on and should be able to tell you what needs attention.

Posted on Mar 13, 2011

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Posted on Jan 02, 2017

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Well the normal way would be to use a acetylene torch an heat it up cherry red an twist it off . Not the cat , the connections .

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Due to clogged catalytic converter someone drilled holes in it and now overdrive doesn't work , working on a 1999 ford expedition , how do I fix this , what all would stop overdrive from working ?


Catilytic converter was stopped up , drilled holes , now it's ...

www.fixya.com/cars/t25967686-catilytic_converter_stopped_up_drilled
Nov 19, 2015 - Catilytic converter was stopped up , drilled holes , now it's loud , runs better but overdrive doesn't work now - Cars & Trucks question. ... SOURCE: doesdrilling holes in a clogged catalytic converter help vehicle? ... Related Questions: ...Feb 20, 2014 ' 2002 Ford Expedition ... 11 people viewed this question ...

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comments on How to check your vehicle's catalytic converter.

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Wouldn't you want to plug the holes you drilled afterwards? .... I believe that the dealer is actually the one that doesn't know things that happen to your car. ... There are some who work at the dealership and are car fanatics who mess with their cars. ..... replaced battery, now someone told me sounds like a plugged convertor, ...

1998 Ford F150 4.6L with clogged cat - YouTube





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new catalytic converter may be faulty restricting exhaust causing loss of power.

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Catalytic converter turns red hot on my 2002 ford escape


The cherry red is probably due to raw gasoline being burned in the converter. Since the engine isn't running right (and I'm surprised you didn't say the Check Engine light was on), there seems to be some kind of valve timing issue or perhaps a burnt valve that is causing at least one cylinder to not fire and thus expel the fuel/air mixture into the exhaust stream. This can be confirmed with a compression check of the cylinders. If they are all low, then there is a problem with valve timing, possible a jumped belt/chain. If only one cylinder is low, then a burnt or broken valve is more likely.

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My car just cut off,when try to restart it spits back thru breather ,runs a little but willnot accelerate,also when it does finally start,cataylic converter gets cherry red


the cherry red catalytic converter is the sign of a complete blocked cat and needs immediately replacement. The starting problems you have are due to this situation. Change the cat and you will see improvement.

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S80 Volvo 2002 t6 check engine was flashing and opened hood and catalytic converter cherry red why?


You have a BLOCKED CATALYTIC CONVERTER.IMMEDIATELY RENEW IT OTHERWISE YOU CATCH FIRE. DO IT THE SOONEST POSSIBLE,

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I have injector pulse.switched coils .still miss fire on 2/4/6/ converter is cherry red.


If the catalytic converter is cherry red there are only a few things that will cause this, extreme over-fueling causing excess unburned fuel to enter the exhaust and overheat the catalytic converter. You will need which cylinder(s) is misfiring, you can ID the problem cylinder by checking the diagnostic OBD2 fault codes, you will have a P03XX in memory, with the XX's being the cylinder number that is misfiring. The possibilities are this, you have an injector that is stuck open or a low cylinder compression issue or a very lean condition that keeps the fuel from burning like a big vacuum leak. Also address any other fault codes found in the OBD2 fault code testing. DO NOT CONTINUE TO RUN THE ENGINE TO THE POINT THE CATAYLUTIC CONVERTER TURNS CHERRY RED! YOU WILL RUIN A VERY EXPENSIVE PART IF YOY HAVEN'T ALREADY

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This is the problem with my vehicle i have a Honda cat turned cherry red smoked the color was white and i looked at the ecu for the flash codes i got 7 witch is stated above replacing that sensor should help the problem. I am doing the same thing tomorrow going to buy the part install it and hope it fixes everything if not i will come back and let you know. everything above you say i am having the same issues so its not just you :)

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