Thread: CIS problems
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E Sully E Sully is online now
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Join Date: Nov 2008
Location: NY
Posts: 3,999
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Pieke, tell us a bit about the car. It is difficult to answer otherwise. All we know is that it starts well, but stops when you lift off the gas pedal.
Does the engine run properly with the pedal depressed? If so it may just need the idle screw adjusted. Is the hand throttle by the parking brake working? If so will it keep running with it lifted? The plastic piece connecting to the throttle linkage breaks over time 901 424 317 00.
How do the spark plugs look? Do all the cylinders have good compression? If it runs poorly, when was the last real tune up and valve adjustment? Spark plugs, wires, cap, rotor, points, been done recently? Is the distributor in good shape? Many have issues if the felt pad in the shaft was not oiled on occasion. The advance weights could be sticking. Play in the shaft can be a problem. Check with a timing light to see if ignition timing is in the ballpark.
If the basic tune up is good, then I would start looking into the CIS system, doing the checks mentioned by Pete and Henry.
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Ed
1973.5 T
Old 07-17-2025, 01:42 PM
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