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Topic Review (Newest First)
02-03-2013 11:49 PM
jtheshowstoppper just noticed fuel filter doesnt fill up at all its while car is cranking or on just barely see fuel spit up I'n it
02-03-2013 12:19 AM
jtheshowstoppper anybody else? stumped thinking about installing a stock cam
01-30-2013 05:03 PM
jtheshowstoppper originally the 283 had oil tube but he switched to eldelbrock manifold that doesnt have tube anymore and he just put a cap on the rear breather next to distributor
01-29-2013 06:06 PM
Originally Posted by jtheshowstoppper View Post
fuel pressure is good double checked the lash seem ok nothing i do is working tdc is straight up or at 2:30 dad put after market timing tab on it and 0 is at 2:30
Maybe cam is to big my dad lost spec sheet
01-29-2013 06:04 PM
jtheshowstoppper fuel pressure is good double checked the lash seem ok nothing i do is working tdc is straight up or at 2:30 dad put after market timing tab on it and 0 is at 2:30
01-28-2013 05:55 PM
GMC boogie You may have the valves too tight. 1/2 turn past zero lash when on the base circle of the cam.
01-28-2013 03:44 PM
Custom10 Some good points already, torx convertors that are too tight for the cam will cause a big drop in idle rpm when trans is put in gear from park.

What are cam specs?

Recheck TDC and the timing tab marker and the damper 0 mark align when #1piston is at true TDC compression stroke, maybe you timing is way off but it looks OK with light due to misalignment of marks.

Fuel pressure 5 - 5.5 psi no more?

1405 is 600 cfm, not too big, do the idle mixture screws actually cause and effect on the idle quality/rpm? how about on the idle vacuum wg"?

When on the road how does the thing run? does it run OK other than idle issue?
01-28-2013 01:38 PM
jtheshowstoppper so I turned down idle plugged vacuum gauge in only got to 15hg timing set to 12degress if I advance my timing all the way to where it touches manifold and turn idle up then I get 20hg I'm stuck
01-22-2013 09:28 AM
jtheshowstoppper checked for leaks everywhere i could think of i had same problem in my impala it was cause my timing was off. came isnt big at all just a entry level edelbrock cam.
01-21-2013 09:32 PM
wont idle in gear

Make sure you don't have any vacuum leaks around the intake flange and carburetor base. If you have a long duration camshaft set the initial timing at 16*- 20*. Then you will have to adjust the mechanical timing to make up the difference to 36* at 3000 rpms. What is the camshaft's part number? Another reason the truck will not idle in gear is the torque converter is too tight. Find out the basic operating range of the camshaft. Say the basic operating range is 2000-6000 you will need a 2500-3000 stall converter. Here is an article on setting up the HEI distributor and your timing curve.
01-21-2013 07:49 PM
jtheshowstoppper ill try that tomorrow
01-21-2013 07:46 PM
scholman jtheshowstoppper,

Here is how I adjust carburetor on my chevy.

Set RPM to 800 RPM
Set timing to 12degrees advanced(that is for my truck)
with the vacuum advance disconnected and plugged.
Re attach the vacuum lines.
Then start adjusting the carburetor by screwing the mixture screws in one at a time until you can see the RPM drop 50 to 100 RPM. This makes the mixture "lean". Now adjust the mixture screws out until you achieve the highest RPM as you can for each of the two mixture screws. By this time the engine will be running too high an RPM so adjust the idle speed screw until you achieve the 800 RPM.
I think this will do the trick

01-21-2013 07:39 PM
jtheshowstoppper im thinking maybe timing tab is off but when i line it up at 0 pistion feels all the way up
01-21-2013 07:35 PM
jtheshowstoppper yeah if i adjust and raise the rpms it drops alot in gear but will barely idel in gear its a bit better but not really
01-21-2013 07:33 PM
Originally Posted by jtheshowstoppper View Post
ok my dad has a 68 c10 rebuilt the 283 to stock except for the cam its beefer.has headers now edelbrock intake and carb 1405 i can get it to idle fine in park but once in gear it dies checked for leaks and found none advanced the timing didnt help even double checked the timing still nothing hooked vacuum gauge not even close to what it should be at. last thing i can think of is maybe carb is to big im stumped
Did you try adjusting your idle speed screw? And did you check for vacuum leaks?
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