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-   -   How many pumps? (https://www.corvetteforum.com/forums/c3-general/3316846-how-many-pumps.html)

Chicagodogs 08-03-2013 06:46 PM

How many pumps?
 
How many pump the pedal before cranking over the motor? If you do, how many pumps?

4SPDL81 08-03-2013 07:38 PM

Takes 4-5 when cold and has set for a week or more, none when warm...good luck!

79L824SPD 08-03-2013 08:19 PM

Yea, Same here. Seems like mine starts quicker if its been sitting a week rather than a few days.

DC3 08-03-2013 08:20 PM

When cold, once all the way to floor to set the choke, then turn the key and it fires right up. That's when driving it every day. If I let it sit for several days, I have to pump twice then hold the throttle down about 1/2 way.

When warm, most of the time I don't have to pump at all but sometimes it takes holding the throttle about 1/2 way.

DC

claysmoker 08-03-2013 08:32 PM

One cold and none hot.

'75 08-03-2013 08:58 PM


Originally Posted by claysmoker (Post 1584579394)
One cold and none hot.

:iagree: If the choke is set up properly, this works every time. If it's been sitting a week or longer it just cranks a few seconds longer. but no pumping.

68/70Vette 08-03-2013 09:26 PM

Never pump the gas pedal. I have an Aeromotive Street and Strip electric fuel pump. When I hit the ignition key position, the pump turns on and at the same time the starter turns over the engine. The engine might make a couple of rpm's but then it fires up.

Ironcross 08-03-2013 09:28 PM

I just reach in through the window and turn the key and it lits right up....but its a FI Vette

kdf1986 08-03-2013 11:39 PM

maybe 3 pumps. But I drive it every Friday to work. So it sits for 1 week. At work, I only have to pump it 1 time.

kdf

7T1vette 08-04-2013 12:46 AM

One....just to set the choke and pump some fuel in the intake. Wait 3 seconds and start it. If you need to do more than that, you don't have the choke set up right...or the accelerator pump isn't working properly...

or you have a Holley!!!! :D

scottw 08-04-2013 06:36 AM


Originally Posted by 7T1vette (Post 1584580904)

or you have a Holley!!!! :D

Street Avenger. One pump to set the choke, turn key, fires right up. Every time. :cheers:

Thanks to lars setting up the carb for me.

Haggisbash 08-04-2013 06:41 AM

One pump, full choke (manual choke) when cold fires move immediately to 1/3 choke, Holley carb.

7T1vette 08-04-2013 08:13 AM

OK, OK.... that was an attempt at humor -- not a vendetta against Holley carbs. :hide:

That's the way all carbs should work, anyway.

Mod75 08-04-2013 10:09 PM

Have manual choke but don't use it, cold 2 pumps, hot nothing.

kwplot34 08-04-2013 10:48 PM

pump it twice, wait about 5 seconds,turn the key and it fires right up. even after sitting for several weeks. And i dont even have a choke on my carb.

Redwing01 08-05-2013 08:43 AM

2 here as well. Fires up every time.

Dustup7T2 08-05-2013 09:45 AM

I mounted a chokeless Demon double pumper on mine. Same basic design as a mechanical double-pumper Holley. Fed by a factory-style mechanical fuel pump and 10 degrees of initial timing on a Comp Cams Magnum 292.

1 pump cold and lightly feather the throttle after start to clear its throat. Part throttle to none warm, gets mine back to idle.

Chinaski 08-05-2013 12:28 PM

Twice when cold, none when warm.

jcloving 08-05-2013 02:36 PM

cold: one pump before I turn the key, one while I turn it to start. It turns over for maybe 2-3 seconds and then fires up.

hot. just turn the key and it roars to life


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