Author Topic: 1966 230SL engine stall & CO too high issue  (Read 177 times)

dnadanny1

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1966 230SL engine stall & CO too high issue
« on: February 10, 2020, 13:20:54 »
Hi there!
As the cylinder head was leaking coolant, I have replaced brand new cylinder head and followed "W113 Basic Fuel Injection Linkage Adjustment and Idle Adjustment Procedures" from pagoda SL group technical manual.

When the temperature is 180°F, ignition timing is 5 BTDC, CO is 5-6% and idle 800 RPM, the following issues appear:

1) after I adjusted the CO to 3.5 - 4%, the engine will stall when I decelerate.

2) When I start the car in the morning with environmental temperature being 62°F, the fast idle is only 950RPM.

How should I adjust the fast idle to 1100 RPM and CO to 3- 4% without engine stalled? Should I adjust to the correct RPM first or the correct CO first?

Any comment will be appreciated!

Thanks,
Danny

ctaylor738

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Re: 1966 230SL engine stall & CO too high issue
« Reply #1 on: February 11, 2020, 13:20:21 »

"When the temperature is 180°F, ignition timing is 5 BTDC, CO is 5-6% and idle 800 RPM"

At this point I would declare victory and move on.
Chuck Taylor
1970 280SL #13027 (restored)
1966 230SL #15274 (sold)
1970 280SL #14076 (sold)
Falls Church VA

dnadanny1

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Re: 1966 230SL engine stall & CO too high issue
« Reply #2 on: February 15, 2020, 01:42:29 »
Thanks for your reply.

When I use smoke analyser to check intake manifold leakage, i discovered that the butterfly shaft contacting switch for automatic has a bit leaking.

May I know if it is a normal circumstance?

Thanks,
Danny

Tyler S.

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Re: 1966 230SL engine stall & CO too high issue
« Reply #3 on: February 15, 2020, 02:49:31 »
They all leak a little. As long as the shaft has no excessive play or binding then it is nothing to worry about.
1968 (67) 250sl. 4 speed manual. DB180 Silver
2019 E450 Wagon. Majestic Blue
1936 Ford PU Flathead V8. Creme on tan interior.
1989 Volkswagen T3 Westfailia Campmobile. Dove Grey (blue)