hard starting poor running 454 - The 1947 - Present Chevrolet & GMC Truck Message Board Network

big10ratrod77 · 03-27-2010, 06:14 PM

ok so as always when i mess with a carb stuff dies well... i done it again

so the 454 in the doolly was running rich and its running a edlebrock q jet 600 cfm i think (it was on the truck when i bought it) in my opinon this carb sucks

so i went to playing with the idel mixture and i went 2 and 1/2 turns out on each side, barly runs. then 3 1/2 turns better, then 4 and it runs but now its kinda skipping and the passenger side of the motor is running rich eny tips for a non big block guy this is starting to make me mad

cableguy0 · 03-27-2010, 06:37 PM

Post a picture of the carb. The first place to start is always timing. You need to ensure the timing is set properly and the ignition parts are in good working order. Fresh cap rotor plugs and wires will do wonders most of the time.

03-27-2010, 06:14 PM	#1
big10ratrod77 Registered User Join Date: Aug 2009 Location: hillborough nc Posts: 410	hard starting poor running 454 ok so as always when i mess with a carb stuff dies well... i done it again so the 454 in the doolly was running rich and its running a edlebrock q jet 600 cfm i think (it was on the truck when i bought it) in my opinon this carb sucks so i went to playing with the idel mixture and i went 2 and 1/2 turns out on each side, barly runs. then 3 1/2 turns better, then 4 and it runs but now its kinda skipping and the passenger side of the motor is running rich eny tips for a non big block guy this is starting to make me mad __________________ 77 chevy BIG 10 350/sm465/12bolt w 3.73 bout 240 horse power NO power steerin 79 chevy 1/2 ton 250/three on the tree/3.08s soon to get built 250/floor shift conversion/3.08s 81 mercedes 300d 25 MPG 77 chevy BIG DOOLEY 454/sm-465/14 bolt 4.10s "fully loaded" 73 plymouth duster 225 slant six/230 3 speed/8 1/4 trying to acheve 300 horse six http://www.cardomain.com/ride/3135091 '77 chevy trucks. built to stay tough. life is short build a hot rod

03-27-2010, 06:37 PM	#2
cableguy0 Senior Member Join Date: Apr 2000 Location: Delta,Pa Posts: 14,950	Re: hard starting poor running 454 Post a picture of the carb. The first place to start is always timing. You need to ensure the timing is set properly and the ignition parts are in good working order. Fresh cap rotor plugs and wires will do wonders most of the time. __________________ Owner of North Point Car Care in Dundalk Md. We specialize in custom exhaust on both modern and classic vehicles. We are a full service auto shop from classics to modern vehicles. Feel free to contact me with questions. I will give a 10% discount to any board member.



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