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Carb or Mechanical Fuel Pump problems??

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Old Dec 28, 2006 | 12:41 PM
  #1  
xgtharo86x's Avatar
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From: Oviedo,Florida
Car: 86' Trans am
Engine: 85 LG4-non cc carb(building a 350)
Transmission: Rebuilt 700R4,vette servo,2200stall
Axle/Gears: 2.73 Posi
Carb or Mechanical Fuel Pump problems??

i have a 85 305ci with a non cc qjet and a elderbrock intake and after i put them on ive had no engine performance..it hesitates and sputters down the road and a 92 hatch stock can keep up with me thats bad i was thinking it was the fuel pump but it still is working but i dont no if its just going...as im driving down the road and i floor it the car will almost shout down and stall but i let go of the gas and hit it slightly and it fine i dont no if its a fuel or carb problem please help its killing me..
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Old Dec 28, 2006 | 01:14 PM
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naf
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From: Lexington, SC
Car: 1987 SC/1985 TA
Engine: 350/vortec/fitech
Transmission: T56
Axle/Gears: 3.27 9-bolt
Did you swap these on in place of an existing ccc-qjet system? If so and you haven't swapped the computer controlled distributor you've found the problem. Lack of ignition advance would cause the problems you've described.
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Old Dec 28, 2006 | 01:23 PM
  #3  
xgtharo86x's Avatar
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From: Oviedo,Florida
Car: 86' Trans am
Engine: 85 LG4-non cc carb(building a 350)
Transmission: Rebuilt 700R4,vette servo,2200stall
Axle/Gears: 2.73 Posi
yea it was a cc but the dist has a vacuum advance in it how do i tell if its a cc it has the 3 plugs on the drivers side if that helps but i think thats the hei
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Old Dec 28, 2006 | 06:45 PM
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naf
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From: Lexington, SC
Car: 1987 SC/1985 TA
Engine: 350/vortec/fitech
Transmission: T56
Axle/Gears: 3.27 9-bolt
Connect a timing light and verify that you're around 20+ degrees at idle and you're getting around 30-36 degrees full advance. Only way to be sure you've not only got the right dist, but it's hooked up correctly and working right.
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Old Dec 28, 2006 | 07:05 PM
  #5  
xgtharo86x's Avatar
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From: Oviedo,Florida
Car: 86' Trans am
Engine: 85 LG4-non cc carb(building a 350)
Transmission: Rebuilt 700R4,vette servo,2200stall
Axle/Gears: 2.73 Posi
My timings on 8*btdc how do u get 20 or 30
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Old Dec 28, 2006 | 08:47 PM
  #6  
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Car: 91 RS
Engine: 350 vortec
Transmission: T-5
Axle/Gears: not the best not the worst
would also like to check the floats on that new carb could be sucking the bowl dry

was looking at your car on cardomain...if your having poping out the intake make sure you arent running that edelbrock bugscreen of a air filter

Last edited by SpitotRs305; Dec 28, 2006 at 09:02 PM.
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Old Dec 29, 2006 | 09:59 AM
  #7  
naf's Avatar
naf
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From: Lexington, SC
Car: 1987 SC/1985 TA
Engine: 350/vortec/fitech
Transmission: T56
Axle/Gears: 3.27 9-bolt
Connect your timing light and while observing the marks, rev the engine and verify that the timing is advancing. You set the timing initially with the vaccuum line to the distributor disconnected, right?

With the vaccuum line disconnected you should see only centrifugal advance, reconnect the line and you should see total advance (up to around 30 or so degrees).
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Old Dec 29, 2006 | 10:49 AM
  #8  
xgtharo86x's Avatar
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Joined: Jun 2006
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From: Oviedo,Florida
Car: 86' Trans am
Engine: 85 LG4-non cc carb(building a 350)
Transmission: Rebuilt 700R4,vette servo,2200stall
Axle/Gears: 2.73 Posi
SpitotRs305-are you talking about the triangle of death? i took that off and got a 14x3 holley...how do u check the floats thats what i was thinking it was
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