Question about 1999 Land Rover Range Rover

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P38 Range Rover

Kevin,

How do I check a plugged catalytic converter? Does this problem also affect the RPM? At one occasion the problem causes the RPM to rev more than 1100rpm.

Thanks

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towman6909

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What to fix if ya rpm gauge not work\

Posted on Jul 17, 2012

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Anonymous

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See if the spark plugs are black... When the cats clogg up They foul the spark plugs, Just like a fire place cloggin up you see black doposite on the walls. you will see a noticable amount of soot on the plugs..

Posted on Dec 28, 2008

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Anonymous

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Could your throttle position sensor, or Idle Control Valve be sticking?

Posted on Oct 04, 2008

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1 Answer

2001 sunfire wont rev over 3000 rpm changed fuel filter no differnce


Michelle/Scott, if no glitch in the computers rev limiter, your exhaust/catalytic converter may be plugged. Have a good tech. check for codes, diagnose and estimate repair.
"I hope this helped you out, if so let me know by pressing the helpful button. Check out some of my other posts if you need more tips and info."

Aug 12, 2016 | Cars & Trucks

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If my catalytic converter is plugged will my rpms jump around while holding speed and make the car lunge? It's a 2006 grand prix gxp.i have replaced everything I can think of except the c converter.


Usually a plugged catalytic converter will cause the engine to buck and not want to gain RPM. It is a simple test that most any good exhaust shop will perform, usually for free, to check the cats. They just drill a small hole before and after the converter and check the back pressure in the exhaust.

May 09, 2016 | Cars & Trucks

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Why is there a sulphur smell and losing power?


Chris, Plugged catalytic's can cause this problem, some GM converters have a access plug in aiding the cleaning of them, but it could be older models. In park,emergency brake on ,rev engine to 3000 rpm approx. and have some body beat (not to hard as to damage) on converter with a heavy blunt object(2x4) and see if it loosen soot,carbon build up and blows it out tail pipe.
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Feb 16, 2016 | 2003 Pontiac Bonneville

1 Answer

Only revs up to 3000 rpm changed throttle body didn't help changed fuel filter didn't help no power above 25/30mph need suggestions


Possible restricted/plugged catalytic converter causing exhaust back pressure to be too high. You will need a back pressure test performed to see if this is the problem. You can also remove the front oxygen sensor and try revving the motor to see if the exhaust leak created with the sensor removed will lower the back pressure and allow the engine to rev higher

Aug 22, 2015 | 2004 Chevrolet TrailBlazer

1 Answer

I have a 1998 ford galaxy 2.3 auto.I have a total power loss on over 2000 revs any suggestions


You most likely have a plugged catalytic converter that backs up the exhaust flow over 2000 rpm. Here is a page with lots of pictures of normal and plugged converters.
Catalytic Converter Viewing Gallery
It also could be something like a worn camshaft, the timing belt slipped a cog, a large vacuum leak or the throttle not opening fully. If it idles OK. hasn't set any check engine codes and seems to run fine until it hits a wall at 2000 rpm it most likely is a breathing problem intake or exhaust. It could be the muffler baffle has fallen out and plugging the outlet.
There may be oxygen sensors on both sides of the converter making it difficult to just remove the converter without screwing up the computer setting a maintenance code.

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1 Answer

Would the catalytic converter cause jeep to idle low?


Not likly but possible. Cat Converters usually only play up after some contamination causes blockage and usually only affects high rev range

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