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#1
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How can you tell if the Catalytic Converter is clogged?
is there a way to tell?
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Ben 1987 190d 2.5Turbo |
#2
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Get an exhaust back pressure gauge. Above-normal back pressure is a pretty decisive sign of a clogged cat.
Drivability-wise, acceleration will drop off significantly, along with fuel economy. Crankcase pressure will increase. The converter itself can also overheat, although that isn't necessarily a sign of a clog (rich mixture can do that too). When one of the cats plugged up on my V8, the difference was audible -- the exhaust sounded constricted during acceleration. |
#3
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Ditto!
Check exhaust back pressure with a pressure gauge, after removing the front O2 sensor and connecting an adaptor. Should have LESS than 1 psi at idle & LESS than 1.5 psi at 2500 RPM.
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MERCEDES Benz Master Guild Technician (6 TIMES) ASE Master Technician Mercedes Benz Star Technician (2 times) 44 years foreign automotive repair 27 Years M.B. Shop foreman (dealer) MB technical information Specialist (15 years) 190E 2.3 16V ITS SCCA race car (sold) 1986 190E 2.3 16V 2.5 (sold) Retired Moderator |
#4
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thanks for the responses mbdoc and maki.
I think that I myself is the problem. After driving diesels for so long, I've gotten spoiled by the diesel torque. When I drive the gas car, the torque just isn't there especially on take off. I believe the car is normal. I now believe that once you drive a diesel, it's hard to go back to gas.
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Ben 1987 190d 2.5Turbo |
#5
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Had a vehicle that slowly clogged the converter.
Along with the other suggestions above, my vehicle slowly overheated under load along with the weak performance. I long for the day I can try out a diesel MB car. I've only gotten to drive gas engines by them!
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My first Mercedes Benz. 4/6/07. 1984 190E (201 024) 2.3L four. |
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