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11-26-2003, 01:01 PM
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#1 |
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Registered User
Join Date: Jan 2003
Location: Cold, Snowy High Level, Alberta Canada Eh
Posts: 394
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damn quadrajet
my new engine is back in the gmc. got a carb problem.its hard 2 start, doesnt run very well on the top, and has almost no power. its starting to bug me. the timing is set at 8 degrees, and it seems as though the carb is the problem. any suggestions as to what the prolbem might be? people say its running lean, but is there anything else it might be?
thanx dale
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2003 yamaha raptor. Stock, but it still hauls!!!! 2000 skiddo mxz 700. Camoplast 1.5 inch track, jaws twin pipes, b+b can, custom built and weighted clutch, wiseco piston, high comp heads. its very fast. wow. 72 c-10 longbox. Bright Orange. Brand new 350, rv cam, performer intake, qjet, headers, 2 1/2 inch exhaust into hooker areo chamber mufflers. Body work coming soon. "dont let yer mind wander, its to little to go places by itself." "Forget the herse, cause i'll never die"-ACDC Back In Black "If It's To Loud, Yer Just Too Old" "I Love Anything Fast Enough To Do Something Stupid In" "Instant idiot, just add beer!!"" |
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11-26-2003, 01:01 PM
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#2 |
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Registered User
Join Date: Apr 2003
Location: missouri city, tx
Posts: 4,486
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whens the last time it got a tuneup?
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70 longbed 496/th400/Ford 9" |
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11-26-2003, 01:09 PM
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#3 |
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Registered User
Join Date: Jan 2003
Location: Cold, Snowy High Level, Alberta Canada Eh
Posts: 394
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about two days ago. new wires, plugs, cap, rotor, coil. all that good stuff
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2003 yamaha raptor. Stock, but it still hauls!!!! 2000 skiddo mxz 700. Camoplast 1.5 inch track, jaws twin pipes, b+b can, custom built and weighted clutch, wiseco piston, high comp heads. its very fast. wow. 72 c-10 longbox. Bright Orange. Brand new 350, rv cam, performer intake, qjet, headers, 2 1/2 inch exhaust into hooker areo chamber mufflers. Body work coming soon. "dont let yer mind wander, its to little to go places by itself." "Forget the herse, cause i'll never die"-ACDC Back In Black "If It's To Loud, Yer Just Too Old" "I Love Anything Fast Enough To Do Something Stupid In" "Instant idiot, just add beer!!"" |
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11-26-2003, 01:25 PM
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#4 |
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CCRider
Join Date: Feb 2000
Location: Olive Branch,MS,USA
Posts: 2,232
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Since your motor is not stock, play with the timing first. I would advance it a little at a time till it kicks back when you try to start it, then retard it till it just stops kicking back. Take it for a test drive, and do some full thottle pulls...up hills if possible. If it pings retard it till the pinging stops. Depending on the gas you are running I would not be surprised if you could run 12 degrees with no problem. As far as the quadrajet, they are VERY senitive to float settings, so raising the float a small amount may cure lean problems if that is what you have.
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72 GMC Sierra SWB almost finished---- 84 Softail Olive Branch MS |
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11-26-2003, 01:32 PM
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#5 |
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20' Daredevil (Ret)
 
Join Date: May 2003
Location: Jefferson State
Posts: 13,593
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Plugged fuel filter? Or gummed up carb?
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- Mike - 1972 K20 LWB 350/350/205 RIP El Jay |
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11-26-2003, 02:37 PM
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#6 |
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huh ???
Join Date: Nov 2002
Location: Fredericksburg,Va.
Posts: 3,369
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How long was the carb off the motor? And was the carb rebuilt while it was off the motor? If you take a used carb off a running motor and let it set any amount of time the seals and gaskets will dry up. When you put it back on you will have air leaks and has\ve a lean run condition...
Chuck
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90 Blazer Silverado 350w/ 700R4 and 32" Kelly's "I am a bomb technician. If you see me running try to keep up!" |
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11-26-2003, 02:47 PM
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#7 |
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Registered User
Join Date: Jan 2003
Location: Cold, Snowy High Level, Alberta Canada Eh
Posts: 394
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huh. the carb was off the truck fer like 2 months. how hard is a rebuild? is it something that i can do myself? how hard is it to track down a rebuild kit for a q-jet?
thanx again boys dale
__________________
2003 yamaha raptor. Stock, but it still hauls!!!! 2000 skiddo mxz 700. Camoplast 1.5 inch track, jaws twin pipes, b+b can, custom built and weighted clutch, wiseco piston, high comp heads. its very fast. wow. 72 c-10 longbox. Bright Orange. Brand new 350, rv cam, performer intake, qjet, headers, 2 1/2 inch exhaust into hooker areo chamber mufflers. Body work coming soon. "dont let yer mind wander, its to little to go places by itself." "Forget the herse, cause i'll never die"-ACDC Back In Black "If It's To Loud, Yer Just Too Old" "I Love Anything Fast Enough To Do Something Stupid In" "Instant idiot, just add beer!!"" |
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11-26-2003, 03:19 PM
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#8 |
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Senior Member
Join Date: Mar 2000
Location: Saskatoon,SK,Canada
Posts: 2,476
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Make sure the fuel pump is OK. I had to replace one this summer as the truck was bogging big time on the top end. It was a freshly rebuilt carb a few months earlier. I asked around and it was suggested that I check fuel pressure. It was fine at idle and through midrange but dropped severly above 2500 rpm. A new pump solved the problem.
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Saskatoon, Saskatchewan Canada |
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