[hauss667]

Ap72, I'm constantly working on something and my dad has two 50's fords he's gonna start on so I'm sure he'll be by to borrow it, 30$ isn't a big deal if I know it'll get used lol. As far as plugs arcing, it could be I can pick up a set tonight at work and try that.

And daddy, I always follow cobalt's advice

The issue I'm having now after purchasing a new pump (that airtex didn't last two weeks) I now can't even get it to fire on its own, yesterday I had it running halfway decent then the pump died, now I have to put some fuel down the carb to get it to fire then I can keep it running but it wont even try on its own and I can see the fuel spraying in.

And malc, I'm 100% positive I've assembled this carburetor correctly

[malc]

"Truck won't idle after carb rebuild"

Originally Posted by hauss667

And malc, I'm 100% positive I've assembled this carburetor correctly

Me too.

[hauss667]

Now I'm not so sure I did. I checked everything new plugs and wires ignition control module is fine coil is good pickup coil is fine new condenser good compression, 0 vacuum leaks, base timing 10 btdc 36 with advance hooked up 5.5 psi at the carb, spark is blue... The only possible thing left is the carb. But everything was done per edelbrock specs .095 secondary jets .086 primary jets .065 x .052 rods and the orange step up springs. I mean theres not much more you can mess up in an afb...

[ap72]

Okay, so eaxactly where do you stand now? What carb? What calibration? What symptoms? I'm still guessing your carb is clogged but let's see where everything stand right now first since you've fiddled with so much.

[hauss667]

Its now a 500 cfm carter afb, as far as calibration it doesn't matter, it surges and runs a little rough. In fact I noticed no change when I pulled a spark plug wire to test spark. And I'm with you on something in the carb but where am I looking?

[hauss667]

Sorry if I take a while to respond, for some reason I'm no longer receiving emails when someone replies lol

[ap72]

The calibration certianly matters a hell of a lot! What have you adjusted to no avail? This is only on the 500 afb. You need to stick with one carb and go from there. The afb is the easiest and probably best for a street machine.

[hauss667]

Sorry if that came out wrong, the only carb I have used is the afb its just a 500 now after I jetted it, and it seems to run a little better the farther I pull the mixture screws out, im talking 4-5 turns but it still surges and runs rough no matter what, and I'm 100% positive I have no vacuum leaks, I used half a can of ether looking

[ap72]

After you jetted it?

Let me ask you a simple question, what is the numbers stamped on the bottom of the carb to the left of the mixture screws? Should be 140? What is the last number?

[hauss667]

I'll go check I believe its a 1407, and yes it was a 650 I took it down to a 500

[hauss667]

H2 9637s is stamped into the carb no 140_ number

[ap72]

You deserve a swift kick in the *** with steel toe boots for that.

You CANNOT "JET DOWN" A CARBS CFM RATING!!!

You're not the first one to think this but its not even close to right. There's your first problem though. Jet it to the proper specs not the specs of a carb you don't have. Actually id use a rod one step thinner on the primary step from stock meaning it it calls for a 7250 run a 7150. I don't know the stock calibration off the top of my head but we'll start there.

Start there and then come back. 90% of your problem should be eliminated.

[ap72]

Your carb number is for a 625cfm carter afb.

You DO NOT have an edelbrock carb.

Find the propper stock settings for the carb you have.

[hauss667]

Seriously?! Ap I apologize for all the headache I've caused you, everyone I've talked to including my farther who has been scratching his head over this has not once mentioned that you cant jet down a carb... I've never done it, just rebuilt them. So, and please just bear with me, why is that you can jet up a carb but not down? And how did you find it was a 625? I did a lot of searching that turned up nothing. And am I wrong in thinking carter and edelbrock are one in the same?

[ap72]

You can't "jet up" a carb either. Its a common misconception among people who know just enough to be dangerous.

For the carb model you have I just used google. Took all of 13.2 seconds.

The edelbrock and carter designs are VERY simmilar but they are not identical. Most of the parts interchange but not all of them. Also some parts of the fuel metering are different, which is why you can't use edelbrock specs.

Fimd the carter specs, you may be able to match the edelbrock rods and jets to their specs for use in your carb.

Btw you have an easy carb to work with, so just be patient and find your stock specs.