Sputtering 460
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Junior User
Joined: Jan 2003
Posts: 82
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From: Louisiana
Sputtering 460
After a mud race last night my 460 sounds like its loading-up, revs fine in park but when I put it in gear it hesitates a little, still spins the 38 inch tires but when I stop after a bought 80 feet it loads up so bad it wont hardly take off again, give it a few seconds and it will do ok again but still not good. Even with just a little throttle it will spit and sputter. The carb is a new 750 edelbrock on an Offenhouser intake the carb was working fine before. I recently installed a new cam and lifter set 262/272 duration and 479/504 lift, left stock springs. I have changed all plug wires and checked all plugs also checked timing. I have an electric fuel pump that pumps 20-30 gph open flow thinking I may be running out of fuel bought new Holley pump 97 gph haven’t hooked it up yet.
I’m new to the engine-building world any help would be appreciated.
I’m new to the engine-building world any help would be appreciated.
Post Fiend
Joined: Feb 2001
Posts: 6,624
Likes: 8
From: Missouri
Sputtering 460
Make for certain that you don't have an gremlins in the ignition system. It could be any number of things. How long was the carb off? It takes not time for it to start to dry rot on the bench. Not real familiar with the edel carbs. Sounds like the carb to me. Is the choke sticking? Rig the choke to stay open all the time. See if the problem still persists. Probably gonna take some time to shoot down. Your vaccum or mechanical advance could be sticking. Good Luck!
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Junior User
Joined: Jan 2003
Posts: 82
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From: Louisiana
Sputtering 460
Thanks for the reply I have a new coil new cap and rotor new plug wires and the carb is also new got it from Jegs last week.
I did notice a water leak on my intake manifold near the #1 cylinder, could the water also be leaking into the intake port of the head and dropping into the #1 cylinder? I will change the intake gasket tomorrow, it needs to be done anyway this time I won’t get in a hurry and I’ll torque to spec.
I did notice a water leak on my intake manifold near the #1 cylinder, could the water also be leaking into the intake port of the head and dropping into the #1 cylinder? I will change the intake gasket tomorrow, it needs to be done anyway this time I won’t get in a hurry and I’ll torque to spec.
Postmaster
Joined: Aug 2001
Posts: 2,882
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From: Nevada
Sputtering 460
Sounds like the float valve could be sticking in the open position.
Is there a reason you didn't change springs for the new cam?
Is there a reason you didn't change springs for the new cam?
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Senior User
Joined: Jul 2002
Posts: 279
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Sputtering 460
This happens to me & buddies all the time when we mud/water race...
It is almost always water under the cap on the dist and/or wet or damp airfilter!
It is usually both problems together.
Check those two things. Thoroghly dry your cap & points, then airfilter, housing & all ducts.
Hope that helps. I know its basic stuff, but people overlook the little things sometimes.
It is almost always water under the cap on the dist and/or wet or damp airfilter!
It is usually both problems together.
Check those two things. Thoroghly dry your cap & points, then airfilter, housing & all ducts.
Hope that helps. I know its basic stuff, but people overlook the little things sometimes.
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Thread Starter
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Junior User
Joined: Jan 2003
Posts: 82
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From: Louisiana
Sputtering 460
Thanks for the help; the dist. cap was the first thing I looked at since it’s on the front of the engine right behind the fan.
You’ll get A laugh out of this one, turned out to be old gas, the truck only gets run allot during racing season. I know, all that new stuff and I failed to clean the tank.
I left the old valve springs because I was running out of race truck money.
You’ll get A laugh out of this one, turned out to be old gas, the truck only gets run allot during racing season. I know, all that new stuff and I failed to clean the tank.
I left the old valve springs because I was running out of race truck money.
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