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post #1 of (permalink) Old 08-27-2002, 10:04 AM Thread Starter
 
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Cold Start Problem with the MC 2100

For starters I have : 258, MC2100, manual choke, TR ignition upgrade.

My problem is cold starting, even though it isn't cold down here. In the mornings I start the engine, it runs for 3 seconds and dies. Usually it doesn't take more than 2 trys and it is running. When I use the manual choke I can not get it started unless the choke-plate is almost all the way open.

In the afternoon it starts great, no choke no hesitation.

What do I do to fix this?

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post #2 of (permalink) Old 08-27-2002, 11:17 AM
 
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Re: Cold Start Problem with the MC 2100

are you pumping the gas pedal a couple of strokes to squirt some gas in there?

if you are, are you sure its squirting?

maybe the accellerator pump diapragm is bad.

it should squirt a good steady stream when you give it throttle, you can remove air cleaner, look down teh throat with the choke open, and move the throttle from idle to wide open 2 times while watching, it should squirt.

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post #3 of (permalink) Old 08-27-2002, 11:21 AM Thread Starter
 
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Re: Cold Start Problem with the MC 2100

Yes, I give it a couple of pumps first before I try to crank. The accelerator pump works fine, I get a nice stream of gas when it is pumped.
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post #4 of (permalink) Old 08-27-2002, 12:59 PM
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Re: Cold Start Problem with the MC 2100

My pickup has a manual choked holley four barrel on it. I noticed that it also doesn't need much choke to start. Usually the warmer the air temperature outside, the less choke it will need. When winter comes, we'll probably both be using full choke to get it started.
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post #5 of (permalink) Old 08-27-2002, 08:34 PM
 
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Re: Cold Start Problem with the MC 2100

sounds to me like your carb is letting the fuel run back down to the tank there by running out of gas till the fuel pump brings it more on the second start
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post #6 of (permalink) Old 08-28-2002, 06:14 AM Thread Starter
 
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Re: Cold Start Problem with the MC 2100

I dont have a fuel return line. and the carb bowl is still semi full in the mornings.
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post #7 of (permalink) Old 08-28-2002, 06:18 AM
 
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Re: Cold Start Problem with the MC 2100

well then , id guess the timing isnt set to spec, or the plugs/wires/cap might be a littel weak

if its got the fuel, why isnt it firing it consistantly? unless it isnt enough fuel to keep it going, maybe the fuel pump takes a minute to refill the bowl, the fuel pump should hold pressure on the line from the pump to teh bowl though.

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post #8 of (permalink) Old 08-28-2002, 07:11 AM Thread Starter
 
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Re: Cold Start Problem with the MC 2100

Timing is set at 8 btc. The cap rotor and wires are the brass terminal premiums. The plugs have a slight tan color and are not fouled. The engine runs great once it warms up (2-3 minutes). I found that the fuel pump is good (when I was setting my float level I forgot to hook the spring clip on the plunger....lots of gas and lots of pressure).

I was wondering if this could be as simple as a choke setting? I would be interested in hearing how others have "set the choke plate" in reference to the fast idle cam. On my MC2100 I have the option of 2 holes on the linkage between the choke plate and fast idle cam. Currently I have it set on the hole which allows the most travel between the two.
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