Stinky and smoke
Thread Starter
Melting Slicks
Joined: Nov 2002
Posts: 2,471
Likes: 2
From: 1993 Quasar Blue 'vert Scottsdale AZ
Stinky and smoke
Since my heads/cam package a couple of years ago, I've had weird symtoms with my '93. At first I had an exhaust smell so bad it was unbearable. I had heated O2 sensors installed and that seemed to help. My symptoms now are: the stink comes back only when I'm idleing for a few minutes, the passengers side header gets way hotter than the drivers side, yet the temp. of the exhaust from the passenger's side is much cooler. The other morning, I started it up and got a lot of smoke, and just figured it was because it was cold outside. I drove to the post office, got and and the smoke was coming only from the passenger's side exhaust. The exhaust from that side was still cool, whereas the driver side exhaust was clean and hot. Plus my gas mileage sucks.
Thread Starter
Melting Slicks
Joined: Nov 2002
Posts: 2,471
Likes: 2
From: 1993 Quasar Blue 'vert Scottsdale AZ
I have RT cats. The smell is much worse than rotten eggs. It would gag a maggot. The smoke was light in color (white or light blue?). I have no codes. I have a new post in Scan & Tune about the weird readings that I'm getting from my new Autoxray 5000.
Le Mans Master
Joined: Feb 2006
Posts: 8,753
Likes: 9
From: Louisiana
Have you check the spark plugs, especially on that left side? I read that in Scan and Tune, but have no clue. I have never used an Autoxray 5000. Only thing that would come to mind is a bad ALDL to scanner connection, bad scanner, bad ECM ground, ALDL wiring, or ECM. Which is probably what you had thought of.
Thread Starter
Melting Slicks
Joined: Nov 2002
Posts: 2,471
Likes: 2
From: 1993 Quasar Blue 'vert Scottsdale AZ
Thanks. I pulled one plug and it was pretty black. I'll check the rest. I'm now thinking an O2 problem. I was getting super low numbers from the autoxray. I thought that it was the scanner, but I hooked it up to my Tacoma and everything worked fine.
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Le Mans Master
Joined: Feb 2006
Posts: 8,753
Likes: 9
From: Louisiana
STL94LT1, is correct in his statement.
Go ahead and pull all 4 plugs on the left side and see what you find. With ruling out the scanner as being faulty, the O2 readings are probably right. With the batch/bank fire injectors, I would say either bad O2, leaky/faulty injector(s), or weak spark....depending on what you find.
What were the O2 readings on the scanner? I remember you mentioned they were low.
Go ahead and pull all 4 plugs on the left side and see what you find. With ruling out the scanner as being faulty, the O2 readings are probably right. With the batch/bank fire injectors, I would say either bad O2, leaky/faulty injector(s), or weak spark....depending on what you find.
What were the O2 readings on the scanner? I remember you mentioned they were low.
Thread Starter
Melting Slicks
Joined: Nov 2002
Posts: 2,471
Likes: 2
From: 1993 Quasar Blue 'vert Scottsdale AZ
If I remember correctly, the right side was like 35 mV and the left varied between 200 and 500. I'm going to stop by EM today and see if they have time to hook their scanner up to it.
Thread Starter
Melting Slicks
Joined: Nov 2002
Posts: 2,471
Likes: 2
From: 1993 Quasar Blue 'vert Scottsdale AZ
May have found the problem. I had planned on stopping by the shop that works on my Corvette, but it turned out to be one of those work days from hell, so I stopped by the garage where I have taken my other vehicles for 20+ years because they always have a fridge full of beer. They hooked up their Snap-On scanner and the right O2 scanner is garbage. I'll stop by my Corvette's shop tomorrow and see if they will admit that they sold me a faulty sensor. If not, it's time to find a new shop or do it myself.
