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Old 02-04-2007, 05:37 PM
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Join Date: Mar 1999
Location: Williamsburg,VA, USA
Posts: 106
380 Timing

116.92 usa spec engine.
I've finally got the car back together after eatin some valves/pistons when the timing guide broke. It is running, but not real smooth. All the timing marks (damper, both cams, distributer) line up. Timing was set to TDC with the vacuum off with the car at idle. It runs very rough, like the timing is retarded, until the advances kick in at about 1500, then runs great up to 3000.

How do I set the TDC sensor? I have read the procedure in the CD, don't have all the special tools they suggest. Is there layman's way of setting it correctly?

Reading the timing chart on the CD, if I am reading it correctly it says the timing should be at TDC at idle? Is this correct?

Thanks, want to get this car on the road and sold before sailing season starts again. Taking way too much of my spare time.

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Old 02-05-2007, 06:42 PM
fpharryc's Avatar
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Join Date: Sep 2003
Posts: 105
Timing is right at TDC. That's correct. No advance.
11 S550
09 C300
91 560SEL
90 300CE
84 380SE
83 240D
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Old 02-06-2007, 12:16 PM
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Join Date: Mar 1999
Location: Williamsburg,VA, USA
Posts: 106

Thanks for the response.

The CD says: With the crankshaft at 20 after TDC, the sensor must be right over the pin on the dampner. Then it gives a method with special tools and a dial indicator to align the sensor.

Are the markings on the Dampner accurate enough to just set 20 after under the marker and align the sensor with the pin?
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Old 02-06-2007, 12:27 PM
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Join Date: Aug 2006
Posts: 141
Timing 380

The TDC sensor was for Dealer special equipment and has no bearing on the way your car runs. Look for vacuum leaks or bad injectors.

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