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#1 |
Big Red & Mister Blue...
Join Date: Jan 2008
Location: Pat, NJ
Posts: 107
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GM350CID/290HP question
I was just wondering if anyone that has a 350/290 is on the same situation. You turn on the truck, but u have to give it a little gas, and it starts right away, almost instantaneous, but if u dont give it gas on the first atempt, it takes a while to start and then u have to kinda like prime the carb with the throttle.
I bought a regular mechanical fuel pump, like the Carter design, i have a GM Racing Mech pump but i cant put it in, i will have to grind the right side engine cross member so the fitting can go in there. Does this starting problem is due to the pump not having enough PSI for 350 engines? Thanks.
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K10 1967, SM420 & Rockwell T221 ![]() C1500 1991, 305 CID, Ext Cab, Full Size bed, everything original except air cleaner. |
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#2 |
Registered User
![]() Join Date: Jan 2008
Location: Chesapeake Beach, MD
Posts: 812
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Re: GM350CID/290HP question
im pretty sure thats any carb'd v8... my built 355 with a 750dp does it when its cold
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71 cheyenne lwb 300rwhp best 1/4 time so far 12.8 @103 ![]() http://i195.photobucket.com/albums/z...en58/001-2.jpg |
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#3 |
Between Trucks...
Join Date: Mar 2002
Location: Los Angeles, CA.
Posts: 3,830
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Re: GM350CID/290HP question
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Beat it to fit, Paint it to match... ![]() Last edited by Sinister; 09-26-2008 at 05:26 PM. |
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#4 |
I am a Referee of life.
Join Date: Jun 2000
Location: Greensboro N.C.
Posts: 13,993
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Re: GM350CID/290HP question
All carbed engines do this to some extent.The fuel in the carb has to be "Squirted" into the "Venturi's" to atomize with air and become volatile.Standard procedure for new cars in the 50-60's were to pump the pedal to the floor one time,release,then crank.This allowed the accelerator pump to squirt fuel into the engine.It later "Set" the automatic choke also.All of this is done by the electronics on EFI and so no "pump" is required.
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The 47-present Chevrolet and GMC Truck Message Board Network,it's owners,moderators,members,and associates of any type should not be held responsible for my opinion. You can't fix stupid,not even with duct tape. "My appearance is due to the fact that "GOD" does punish you for having too much fun!" Barrett-Jackson has perfected alchemy,they make rust into gold! "You can lead a horse to water but you can't saddle a duck" "Cleverly disguised as a 'Responsible Adult' "Sometimes your Knight in shining armor is just a retard in tinfoil" Last edited by PanelDeland; 09-26-2008 at 05:33 PM. |
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#5 |
Registered User
Join Date: Dec 2004
Location: Northern AZ
Posts: 7,271
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Re: GM350CID/290HP question
Yeah, more a carb issue than fuel pump, but doesn't mean the carb is "BAD" just needs a pump of fuel to get er going!
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#6 |
Senior Member
![]() Join Date: Aug 2003
Location: Conyers,Ga.
Posts: 7,286
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Re: GM350CID/290HP question
What carb. do you have?
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#7 |
Big Red & Mister Blue...
Join Date: Jan 2008
Location: Pat, NJ
Posts: 107
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Re: GM350CID/290HP question
Edelbrock Thunder AVS Carb model 1805
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K10 1967, SM420 & Rockwell T221 ![]() C1500 1991, 305 CID, Ext Cab, Full Size bed, everything original except air cleaner. |
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#8 |
laying low
![]() Join Date: Mar 2001
Location: Searcy, Ark. USA
Posts: 13,235
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Re: GM350CID/290HP question
That's the deal. You have to give it a little bit of pedal to start it off. Sounds kinda antiquated doesn't it? It's not necessary with efi. We've had fuel injected engines now for a long time and I know a few people who still mash the pedal upon startup just out of old habit. Some will even pump it several times before turning the key...
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Boog 69 Chevy stepside, 358/T350, 4.11 posi, 4.5/4 drop, rallys, poboy driver primer is finer 91 Chevy sportside, Tahoe, Yukon & GMC Crewcab All GM..'nuff said. I stand for the flag and kneel at the cross |
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#9 |
Registered User
Join Date: Feb 2005
Location: Carl Junction, Missouri
Posts: 2,061
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Re: GM350CID/290HP question
consider the lawnmower or weed eater, got to prime it a bit.
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#10 |
Big Red & Mister Blue...
Join Date: Jan 2008
Location: Pat, NJ
Posts: 107
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Re: GM350CID/290HP question
Thanks for the tips, this is my first classic truck and i never had a carbed vehicle, so that was kinda scaring me.
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K10 1967, SM420 & Rockwell T221 ![]() C1500 1991, 305 CID, Ext Cab, Full Size bed, everything original except air cleaner. |
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