Smog Pump stuck on 82 TA, random questions
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Joined: Aug 2002
Posts: 2,076
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From: Milwaukee, Wisconsin
Car: 1982 Trans Am
Engine: LG4
Transmission: 200C
Axle/Gears: 3:73
Smog Pump stuck on 82 TA, random questions
A mechanic said my smog pump was frozen. The temp outside is ranging from 0-20 degrees F. I let it sit inside for a few hours in a heated garage, and when I tried to move it, it appeared as if it was jammed. Right now there is no belt on the smog pump.
When the computer takes readings from the oxygen sensor, does it compensate from the extra air the air pump blows past the sensor? I remember ecms for a tpi motor do, but not sure if my 82 ecm does.
I have new universal 3 inch catco cat that has been on for a few month, and was told it wouldn't clog up as easily as the stock piece because of the honeycomb design.
When the computer takes readings from the oxygen sensor, does it compensate from the extra air the air pump blows past the sensor? I remember ecms for a tpi motor do, but not sure if my 82 ecm does.
I have new universal 3 inch catco cat that has been on for a few month, and was told it wouldn't clog up as easily as the stock piece because of the honeycomb design.
Last edited by TransAm12sec; Jan 18, 2005 at 09:16 PM.
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Joined: Sep 2004
Posts: 78
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From: Riverside, CA
Car: 64 Studebaker Avanti,67 ElCaminoTBI
Engine: GM 350 10.5:1 Supercharged
Transmission: 700R4
Axle/Gears: 3.54 posi
Some information
A mechanic said my smog pump was frozen. The temp outside is ranging from 0-20 degrees F. I let it sit inside for a few hours in a heated garage, and when I tried to move it, it appeared as if it was jammed. Right now there is no belt on the smog pump.
When the computer takes readings from the oxygen sensor, does it compensate from the extra air the air pump blows past the sensor? I remember ecms for a tpi motor do, but not sure if my 82 ecm does.
I have new universal 3 inch catco cat that has been on for a few month, and was told it wouldn't clog up as easily as the stock piece because of the honeycomb design.
Frozen is just a term used to mean it is siezed!
The air pump uses a switching valve to go up-stream when in open-loop Computer in pre set mode.
When the computer gets signals from the O2 sensor (switching rich / lean and the engine has reached aprox. 175 degrees, and 4 to 8 min. of time, the car will go into close-loop. Now the computer is fine tuning the air/ fuel ratio via the O2 sensor readings.
The problem that can occur when pump is not pushing out any air, is the parts will start getting too hot. When this happens the air diverter valve will burn up. The back-up safety system is the check valves located on the rails. They must work correctly! Unhook the hose and start the car, if no exhaust leaks out they are still ok and the deverter valve is probley ok to. If they leak the they are bad and the diverter valve is most likely damaged.
Do the air pump now, and the belt.
When the computer takes readings from the oxygen sensor, does it compensate from the extra air the air pump blows past the sensor? I remember ecms for a tpi motor do, but not sure if my 82 ecm does.
I have new universal 3 inch catco cat that has been on for a few month, and was told it wouldn't clog up as easily as the stock piece because of the honeycomb design.
Frozen is just a term used to mean it is siezed!
The air pump uses a switching valve to go up-stream when in open-loop Computer in pre set mode.
When the computer gets signals from the O2 sensor (switching rich / lean and the engine has reached aprox. 175 degrees, and 4 to 8 min. of time, the car will go into close-loop. Now the computer is fine tuning the air/ fuel ratio via the O2 sensor readings.
The problem that can occur when pump is not pushing out any air, is the parts will start getting too hot. When this happens the air diverter valve will burn up. The back-up safety system is the check valves located on the rails. They must work correctly! Unhook the hose and start the car, if no exhaust leaks out they are still ok and the deverter valve is probley ok to. If they leak the they are bad and the diverter valve is most likely damaged.
Do the air pump now, and the belt.
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