Pagoda SL Group
W113 Pagoda SL Group => Drive train, fuel, suspension, steering & brakes => Topic started by: rogerh113 on July 25, 2008, 12:53:04
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Hello,
Went on my weekly 30 mile jaunt last week and the car ran flawlessly, but when I went to start my '66 230SL this week the engine kicks over but stumbles. I did fill up the tank before the trip, and had no problems on the trip (stopped 3 times with no restart issues), so probably not the gas. The engine has a low stumbly idle (generally runs at 1K just after start, and now at around 5) and very hesitant/difficult to rev (so I didn't push it). Hadn't changed the plugs in a while, but that did not help. The one thing that I notice is that the air intake for the cold start (on top of the injection pump) is much louder than I have ever noticed before. Is there a typical failure mechanism there that could be dumping too much air into the engine and causing this??
No obvious loose lines or electrical connections - I hope it is not serious...
Regards -- Roger
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Unscrew the filter and stop the air flow into the intake manifold---see what happens.
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I'll give it a shot - not sure what NO air will do, but it is worth a test!! I've rebuilt the cold start before, but a long time ago so I don't remember how the air flow is actuated. Hopefully I can find a schematic that will help.
The weather here in the California bay area is stunning, and I need to get back on the road!!
Thanks -- Roger
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The air filter on the FI pump- about 1 1/4" in dia. The thermo closes this air to the CSV when the temp gets to-whatever the specs say- 70 C?
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Rebuilt the cold start unit, and things seem pretty much back to normal (aside from a bit of further tweeking needed on the idle screw, etc).
Regards -- Roger