Hi All,
I have a 1984 Chevy Celebrity station wagon with a 2.8L GM V-6 with a computer-controlled carburetor on it. The engine was rebuilt about 25,000 miles ago and passed emissions inspection about 10,000 miles ago. I also replaced the EGR valve at that time and cleaned out the EGR passages (in order to get it passed)
A few weeks ago I bought a used OTC 4000E scantool with the idea to use this on both the 84 Chevy and a 95 T&C that I own. When I got the scantool I decided to make a baseline of both vehicles.
The 95 Chrysler came out fine, lots of fun with the scantool testing out it's features, lots of fun statistics and info from the engine and transmission off the CCD adapter.
When I plugged it into the Chevy, however, while I got lots of fun statistics and such out of the engine there, the one thing that caught my eye was that the scantool insists the engine is runing rich. It even has a red light on the scanner that illuminates marked rich.
Anyway, before I go digging, is there anything obvious that anyone remembers about these particular vehicles that I should check first? My gut feel is it's in the carb somewhere, as the carb was not replaced when the engine was rebuilt.
Other than that the Chevy runs fine, although it has a lot worse fuel mileage than I expected on a 2.8L, that is why I think that the scantool is right.
Ted