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Hot Rod Forum : Hotrodders Bulletin Board > Tech Help> Engine> Installed new reman'd Edelbrock carb... can't get engine to run!
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Topic Review (Newest First)
07-02-2008 10:47 AM
MyHooptie Its running! After all that it was too much fuel pressure from my stock pump. I had called Edelbrock's help line and the guy said right away that it was likely too much pressure. Apparently those Edlebrocks have 'sensitive' valves and even stock pump prob is putting out too much psi for it. So I bought a $25 Mr. Gasket inline pressure regulator (nice shiny chrome ) and it did the trick! Fired right up and wanted to idle.

Thanks for all of your help!

Ced
06-23-2008 04:48 AM
barnym17 First things first if you just pointed the rotor at number 1 your timing is likely to slow causing your problems. Advance it a little it will run. I seem to remember on these older small blocks the line you are talking about went straight to intake vac. There is an oil seperator under the intake (big ol can looking thing) but I could be wrong just plug the port till ya get her running then hook it back up to be sure.
06-23-2008 01:31 AM
MyHooptie On the old 283 there is a hose that runs from the hole at the back of the block just behind the dist. directly into the back of its 2bbl carb. If I'm not mistaken, it was intended to vent gases from the crankcase back into the carb to be burnt off. PCV valves have now replaced these. Seeing is there is a specific port (the large one at the front center of the carb) that is labeled as being a PCV port, I unhooked the draft tube from the back of the carb and blocked the port off. No difference.

I appreciate your guys suggestions. I guess tomorrow (well today) when I call their help line I will hopefully find out whats truly going on. I'll be sure to post what I hope will be a success story.
06-22-2008 10:43 PM
solidaxel You may want to review that port that Duce is talking about.
Isn't the draft tube on a 327 coming out of the block in back of the dist. and going down to the bottom of the oil pan?
Explain how you have the draft tube into the Carb?
06-22-2008 08:31 PM
MyHooptie Toecutter - I've had it apart now and the floats look to be at the 7/16" gap they are suposed to be at. I pulled the needles out and they look brand spanking new their homes were nice and clean too.

Deuce - Yeah I have my vent tube? draft tube? plumbed to the vac port in the back. all other unused ports are capped off.
06-22-2008 08:25 PM
Deuce Now to be a wise guy ... but there is a threaded hole in the rear of the carb ... did you plug it? Makes for a big vacuum leak if you did not. I had a friend who installed a new Edelbrock 600 cfm on his 350 and forget to plug that hole. It barely ran ... and flooded the car. Check the plug in the rear.



This photo ( off the internet ) had a brass fitting in the place I am talking about.
06-22-2008 08:18 PM
toecutter I doubt the old pump is putting out too much PSI sounds to me like something in the needle and seats not letting them shut. or just badly adjusted float levels.

I was gonna say that we used to pinch the rubber line from the tank to the pump till the whole shabang was bone dry, then we cranked the thing over and sometimes pressure would be enough to blow anything in the seats out, (sometimes)

course that was a long time ago we used to do that
06-22-2008 07:44 PM
MyHooptie Its old points. I just pointed #1 terminal of the cap in the general pos of the first cylinder with the plan on getting a gun on it once running...
06-22-2008 06:57 PM
solidaxel How did you set the timing of the distributor, is it a HEI or point type?
06-22-2008 05:13 PM
MyHooptie I took the carb off before opening it up and prob lost some of the fuel that was in its bowls but even still the levels were quite high. My guess is with the floats in there it would prob be to its top. Don't recall if there was much for gas at the accelerator pump. I did previously check the fuel pump and its def moving gas... alot of gas it seems. With the end of the fuel line in an old spaghetti sauce jar, a few rotations had the jar half full of gas.
06-22-2008 04:48 PM
solidaxel When you lift the top off the carb where is the fuel level?

Is there any fuel in the well where the accelerator pump is?

Have you tried to check the fuel pump by seeing how much gas is pumped into a container with each revolution of the engine (ignition disconnected so engine will not start) are you getting too much fuel or not enough?
06-22-2008 04:26 PM
MyHooptie I put it back together and on. Did something right as its trying to start every time I turn the key. The engine is firing but just wont take of and run. Time to start playing with adjuster screws? Or should I be looking at something other than my carb now ie timing? I cant tell if its still flooding without taking it back off but like I said its getting closer to wanting to work...

Your advice?
Thanks!
06-22-2008 03:24 PM
MyHooptie Well if I can get this one to cooperate (and I'm sure its just something simple I'm missing) I'd think you can't go wrong for their price! This one only cost me $259 Cdn in the box with instructions, gaskets, and all the other goodies.

Although unlikely, I'm going back to wondering if its possible my stock fuel pump is putting out too much pressure. Is it possible the pump I'm using from my old 283 that fed a small 2bbl is somehow putting out too much for the Edelbrock? Edelbrock is very clear that their 600cfm likes no more than 6.5psi. I don't have a fuel pressure gauge or a regulator. I might have to go buy one...
06-22-2008 02:43 PM
solidaxel I am watching too see how this turns out!!
I have lived in the Holley world for 45 years so the "NEW" AFB are a challenge to me!
06-22-2008 02:38 PM
MyHooptie Hmmm... gave the carb a gentle beating ...

Still acting the same so I pulled it off to find the inside on my intake drenched in gas. I pulled the top off the carb and carefully lifted the top) hoping to catch one of the floats sticking but both seem to be loose and moving freely. I did as described in their vid and flipped the top and checked the floats gap. Pretty damn close to 7/16".

Is there something else I should be checking while I have the carb open?
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