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sputer problem

Old 08-26-2009 | 11:50 AM
  #1  
mrfiles's Avatar
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Joined: Dec 2008
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From: martinsburg wv
Car: 87 z28 tpi and 06 cobalt
Engine: 305 ho tpi and 2.2l ecotec
Transmission: 700r4 and not a clue
sputer problem

I have an 87 camaro that was a 305tpi automatic swapped to a 350 carb t-5 trans. If i go down back roads or interstate about 55-65 its ok but if i go down the interstate doing 70-75 after about 8 miles the car sputters it will take off for second then start sputtering and jerking around for a second and the take off for a second and sputter again but as soon as i stop and restart moving it'll act fine for a few miles and the start sputtering again anyone that can help me please pm me and let me know what you think it could be thanks
Old 08-27-2009 | 11:11 PM
  #2  
Rolling Thunder's Avatar
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Joined: Mar 2008
Posts: 1,549
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From: CT
Car: 86 T/A, 83 Z/28
Engine: 5.0 TPI, 350 2 X 4 bbl
Transmission: 4 speed auto, 5 speed manual
Axle/Gears: 3.23 posi, 3.73 std
Re: sputer problem

sounds like perhaps you have a bit of a tuning issue specifically running alittle rich. Theres 3 fueling circuits in a carb. the idle, primaries, and the secondaries. It sounds like you may want to check out the secondaries as there only open when theres enough vacuum to open them which could explain why it happens at a higher speed.
Old 08-28-2009 | 10:12 AM
  #3  
mrfiles's Avatar
Thread Starter
Junior Member
 
Joined: Dec 2008
Posts: 13
Likes: 0
From: martinsburg wv
Car: 87 z28 tpi and 06 cobalt
Engine: 305 ho tpi and 2.2l ecotec
Transmission: 700r4 and not a clue
Re: sputer problem

thanks for the good idea i also heard the roller rockers might not be adjusted perfect but i have not had roller rockers to adjust before this is my first time with roller rockers.
Old 08-28-2009 | 12:54 PM
  #4  
Rolling Thunder's Avatar
Supreme Member
 
Joined: Mar 2008
Posts: 1,549
Likes: 1
From: CT
Car: 86 T/A, 83 Z/28
Engine: 5.0 TPI, 350 2 X 4 bbl
Transmission: 4 speed auto, 5 speed manual
Axle/Gears: 3.23 posi, 3.73 std
Re: sputer problem

There's no harm in checking the adjustment i suppose. I dont really think it is the adjustment because if it was that far out that it would cause a running issue it would seem to me it would be ticking or making some sort of noise. What kind of carb are you running and whats the specs of your build?
Old 08-28-2009 | 11:28 PM
  #5  
mrfiles's Avatar
Thread Starter
Junior Member
 
Joined: Dec 2008
Posts: 13
Likes: 0
From: martinsburg wv
Car: 87 z28 tpi and 06 cobalt
Engine: 305 ho tpi and 2.2l ecotec
Transmission: 700r4 and not a clue
Re: sputer problem

its an edlebrock performer 600 but everything else motor wise i have no clue i bought the motor and trans off somebody and they never told me anything.
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