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In Reply to: sputtering posted by 2002 Bruin on February 05, 2000 at 03:19:23:
Its called dieseling, and it was the first mechanic's word I learned after I bought my 02.
Why dieseling? Because diesels are designed to run on compression ignition, where you don't need a spark to get ignition in the combustion chamber.
On your car, its caused by something in your combustion chamber being hot enough to ignite any residual fuel even after spark is shut off.
Possible culprits:
Carbon deposits on spark plugs
Carbon deposits on head/piston faces
If your car is overheating I suppose the bare metal could do it, but its most likely carbon. Similiarly, if your timing is too far advanced, you will get hotter combustion chambers, and possibly experience this.
Also, there has to be fuel getting to the combustion chamber for this to happen. Raw air won't ignite. Some of the solex carbs had a shut-off solenoid that would effectively stop gas flow. Make sure yours is working if you had one. I don't know about the downdraft webers, sidedrafts dont have such a gizmo.
How is the carbon getting there? You are running too rich or you are burning oil. Either will leave deposits in your combustion chamber. Adjust your idle mixture if you feel up to it (but don't lean it out by any means), swap the spark plugs, run a better grade of gasoline.
You can run some Marvel Mystery Oil or a good gas treatment through the system (Milton swears by Techron, most of the other gas treatments are crap). It might clean out some stuff. BUT: on a car this old it is possible that gaskets and even hairline cracks have been varnished and sealed by these same deposits. Cleaning it out could expose a larger problem.
Good luck.
Corey
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