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I have a "garage queen" 110,000 original mile Delta 88 with the 'real' Olds 350.
It idles lumpy. It seems too low of an idle to my senses. While I've worked on cars for decades, I'm young enough to have grown up on FI, so carbs are a mystery to me.
I think what makes most sense is to hook up a tach and see what the RPMs are actually at and go from there. If it's low, I understand the idle set screw is under a plug on this year, and not meant to be adjusted? Should I remove the plug and slowly adjust, or should I be looking for another cause for low/lumpy idle?
There is no vacuum leak, I've gone over that already.
I'm assuming you have a four barrel carb? The screws under the plugs are curb idle screws. Your idle screw on a 4bbl is in this picture at the end of the screwdriver.
Yes, it's the 4 bbl 350 gasoline Olds engine. Thanks for that pic. Researching a good tach to buy, or a timing gun that shows RPMs. Don't have any "old car" tools.
Yes, it's the 4 bbl 350 gasoline Olds engine. Thanks for that pic. Researching a good tach to buy, or a timing gun that shows RPMs. Don't have any "old car" tools.
Hi, you're on the right path to some old car tools. There are a few options out there. Learn what they do or don't do before you commit.
Do you want a tach to install in the car dash, or a portable one? I 'd like to suggest to you a portable one that does many functions. Many of these older units do point dwell, tach and volts too. If that interests you, look for Sun, Craftsman, Penske etc. Search for "Engine Analyzer". This same unit is a simple volt meter among other things and can be used on non-related car stuff that you can own for a life time.
