hot exhaust help
Thread Starter
Heel & Toe
Joined: May 2009
Posts: 21
Likes: 0
From: spokane wa
hot exhaust help
After driving around for awhile today I got out of my 1994 6 speed and could "smell" something was very hot under the car. I did the paper clip for codes and got 31,33,35,and 37. Could not find anything in service manual for 31 and 37. 33 and 35 are low pressure MAP. I took it off and it seems fine. ( nothing plugged or broken). I do not have the tools to test a sensor. what should my next step be? thanks for all the help
Thread Starter
Heel & Toe
Joined: May 2009
Posts: 21
Likes: 0
From: spokane wa
I have a feeling of plugged cat. hi-way mpg has dropped from 28 to 21. cruise control will not maintain on a slight incline. No rotton egg smell though. Will cats just get plugged over time? 99,000 miles. And what caused them to plug? I don't want to put on new cats and have them plug up.
Safety Car
Joined: Sep 2010
Posts: 3,752
Likes: 190
From: Indiana PA
I have a feeling of plugged cat. hi-way mpg has dropped from 28 to 21. cruise control will not maintain on a slight incline. No rotton egg smell though. Will cats just get plugged over time? 99,000 miles. And what caused them to plug? I don't want to put on new cats and have them plug up.
It does sound like plugging cat.
Too much heat from too much raw fuel into the cats will destroy them over time. They do fail with time/mileage, but don't tend to clog up. They only tend to do that from melting down, see above on the heat.
You must not run the car much at WOT, I would notice any deficiency in performance anytime I have my Corvette out for a drive.
