my under-the-coil connectors are only about 20,000 miles old but I will replace them.

Thanks Arthur,

I'll check the AC volts for sensor function.

Any help on checking wiring? I'd like to verify continuity. Where do they lead, what pins on computer??

ALso, clearing the code using a OBDII meter rest the CEL but left the code in the computer. The CEL returned, and I'm not sure if this means there is a problem with the camshaft position sensor or circuit, or if I need to clear the computer entirely. This time I'm going to use the battery method, to verify I can get the code to disappear. Then if it comes back I will know it isn't a one-time fluke!

thoughts?

Paul

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1983 500 SL (Gone )
1972 350 SL 4.5

If they are that new , I would hold up on changing them.
Does the car have Plats??????


For original poster:

The sensor should ohm out at 900-1600 ohms. I don't have the pin #s for that chassis.

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A Dalton

no my car has OEM plugs, Bosch F8DC4. After pulling the first set of codes, I cleared them and as I was putting car in the garage, CEL light came on again.
Just pulled that code this morning and again see CYLINDER 2 MISFIRE. Car started fine and ran smoothly but goes to rough idle about 15 seconds after startup. Is cylinder 2 one of the ones which uses the short connected under the coil? Thanks.

Swap that coil with one of the others and see if the code follows the coil.

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A Dalton

after looking at my records, I discovered that the plugs and coil-to-plug connectors had about 40k miles on them. So I got three new connectors from dealer and replaced them and all plugs today. Car seemed to run very smoothly upon startup so I went for a drive. After a couple of miles and while accelerating up a grade, CEL came on and car went to rough idle at the next stop. Drove home and again read out code P0302 (CYLINDER 2 MISFIRE). This was third time it has come up after clearing it the previous two times. The code concerning the camshaft position sensor has not returned after the initial appearance. Is it possible that the coil serving Cylinders 1 &2 is defective? Can anybody explain how one coil is made to serve two cylinders?

Like I told you on the last post...swap the coil with one of the others and see if the code follows the coil swap....... Simple.

You have a Waste Spark Ignition using one coil to fire two plugs that are wired in Series..... a Series Circuit.

Use the Archieves ,,,there are pages upon pages on this .

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A Dalton