: 4bbl carb acting up
NetBSD 11-20-2006, 05:37 PM recently got a nice edelbrock intake and carter carb at the junkyard for $45, runs smooth for the most part but at idle you can hear a real low pop on each bank and when the 4bbl opens up it sputters unless you already have it at 2,000RPM, like its starving for fuel. i did reuse the gasket between the carb and intake and when spraying fluid at it you can hear the motor die down so i tightend up the carb soem more and it stopped but no changes when oprning up the 4bbl.
any info would be great and tricks or tips on getting the mixture set just right, the way i did it was adjust it then smell the exhaust
NHRedneck 11-20-2006, 07:40 PM well PA has tail pipe emissions, ask at a local inspection station if their machine reads A/F mixture...... if so ask em how much it would be to use the machine ofr an hour or so to tune your truck.... 13:1 is a good idle mixture for a carbed vehicle, 12:1 is fine for under load at RPM 2500+ any richer and your pissing away gas....
NetBSD 11-21-2006, 12:18 AM well PA has tail pipe emissions, ask at a local inspection station if their machine reads A/F mixture...... if so ask em how much it would be to use the machine ofr an hour or so to tune your truck.... 13:1 is a good idle mixture for a carbed vehicle, 12:1 is fine for under load at RPM 2500+ any richer and your pissing away gas....
we dont have that here, to small of a town for any emissions, ill ask around see if snywhere near here has one but i doubt it
Oatmeal 11-25-2006, 05:08 PM You need to purchase a "strip kit" for it, they come with a bunch of jets, springs and metering rods to fine tune your carb to your motor. The Carter AFB (I assume it's an AFB) is basically the same as the Edelbrock Performer carb and I ran one on my EB for years, got it dialed in pretty good, put the offroad needle and seat in it but, it never worked well at angles........replaced it with a Q-Jet-----------Hans
Oatmeal 11-25-2006, 05:40 PM Wow, tried looking up strip kits and apparently they're no longer available but, the calibration kits for the Edelbrock performer carbs should work (they're about $50) I did find this, though :http://www.carburetion.com/Carter4.htm hope this helps--------Hans
GMCTruxrule 11-25-2006, 10:15 PM recently got a nice edelbrock intake and carter carb at the junkyard for $45, runs smooth for the most part but at idle you can hear a real low pop on each bank and when the 4bbl opens up it sputters unless you already have it at 2,000RPM, like its starving for fuel. i did reuse the gasket between the carb and intake and when spraying fluid at it you can hear the motor die down so i tightend up the carb soem more and it stopped but no changes when oprning up the 4bbl.
any info would be great and tricks or tips on getting the mixture set just right, the way i did it was adjust it then smell the exhaust
First off, replace the carb gasket with a NEW one. Second, make sure that float level is set correctly, make sure fuel filters are clean/new. After carb gasket is replaced, readjust your carb fuel mixture. Best to use a vacuum gauge, set for highest possible reading at idle.
tip in bogs are accelerator pump issue
NetBSD 11-25-2006, 11:11 PM thanks for the tips but it seems to be working its own issues out, only getting a small sputter with a full throttle take off and its getting better, im thinking it is just a little gummed up or something.
it is a carter AFB, it was on the truck i got the intake off of, same motor and i got to talk to the guy bringing it in the junk yard, he claimd he had it tuned but he had a bad intake leak (i found that the valey pan wasnt sealed correctly on his truck).
all filters are new, im running 3 of them now, one inside the tank, one in the middle of the line (from motoro to tank) and one right infront of the carb, all clear filters so i can see clean fuel traveling, if this real little miss doesnt work its way out ill see about getting a carb kit and maybe toss one of these q-jets on
First off, replace the carb gasket with a NEW one.
this is one of those gaskets they claim are reuseable and it doesnt sputter or bog down when i shoot starting fluid around the carb and intake so its not leaking
Oatmeal 11-26-2006, 12:20 PM .........Best to use a vacuum gauge, set for highest possible reading at idle.That's how I set mine------Hans
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