Cat's throwing a code, Is it possible
Thread Starter
Melting Slicks
Joined: Sep 2003
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Cat's throwing a code, Is it possible
Guys, I have changed and replaced everything. I am still throwing a 32... Why?
I have replace the EGR vavle, EGR soleniod, all the vacuum lines and still I get 32.
A couple of month ago I gutted the cat, can this be giving me the code????? :banghead:
I have replace the EGR vavle, EGR soleniod, all the vacuum lines and still I get 32.
A couple of month ago I gutted the cat, can this be giving me the code????? :banghead:
Team Owner
Joined: Dec 2000
Posts: 90,675
Likes: 304
From: SE NY
Cruise-In II Veteran
Re: Cat's throwing a code, Is it possible (1990CORVETTE)
The code is not related to the cat mods.
It sounds like the EGR Temp. switch on top of the EGR tube is defective or the wiring is open.
Either replace that switch or use the test method on my site (link in sig. below) to verify if it's defective.
Since the EGR Temp. switch connector is burried behind the intake base to the left of the dist, it may be easier to just cut the Grn wire near the current switch and splice in the new switch lead. If so, solder the splice and use heat-shrink tubing to weather proof the connection.
It sounds like the EGR Temp. switch on top of the EGR tube is defective or the wiring is open.
Either replace that switch or use the test method on my site (link in sig. below) to verify if it's defective.
Since the EGR Temp. switch connector is burried behind the intake base to the left of the dist, it may be easier to just cut the Grn wire near the current switch and splice in the new switch lead. If so, solder the splice and use heat-shrink tubing to weather proof the connection.
Burning Brakes
Joined: Feb 2000
Posts: 824
Likes: 2
From: Camden SC
Re: Cat's throwing a code, Is it possible (65Z01)
Hmmmm,
I thought the 90 had the negative back pressure EGR valve. Seems like some people have replaced the stock mufflers with higher flow rate mufflers resulting in less back pressure on the valve, control vacuum is vented, valve does not function properly. Almost certain lack of adequate exhaust back pressure will set a code for the 90's EGR valve.
Now, that said, NOT EVEN FAMILIAR with gutted cats and actual flow rate increases. Newer cats are not that restrictive. Not sure about the 90's.
If this problem occured right after gutting the cats, respectfully submit that MAYBE back pressure reduction could be the cause. Just speculation.
dlmeyers 90 coupe zf6 3 pseed shocks
I thought the 90 had the negative back pressure EGR valve. Seems like some people have replaced the stock mufflers with higher flow rate mufflers resulting in less back pressure on the valve, control vacuum is vented, valve does not function properly. Almost certain lack of adequate exhaust back pressure will set a code for the 90's EGR valve.
Now, that said, NOT EVEN FAMILIAR with gutted cats and actual flow rate increases. Newer cats are not that restrictive. Not sure about the 90's.
If this problem occured right after gutting the cats, respectfully submit that MAYBE back pressure reduction could be the cause. Just speculation.
dlmeyers 90 coupe zf6 3 pseed shocks
