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1982 firebird starts idles really high then dies
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worrior_6692004
Novice
Dec 14, 2008, 8:33 PM
Post #1 of 8
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1982 firebird starts idles really high then dies
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i have a 1982 firebird just bought it it will start up and run for like 2-3 min then dies its carb its a 5.0 305 its on tis second motor i cant tell you how many miles its got replaced fuel pump new fuel line new spark plugs wires new belts rebuilt carb all the gakets on carb are new but the choke stuff are not idk if that could be it are not but i drove it less than a block and it died then like 15 mins later i finally got it started again and got it home and died in the drive way it idles really high when i first start it and will jump in gear and jerk then die and it idles down wen you put it in gear also i can hold the brake and it will spin the wheels when its wet when im not even pressing gas please help if you can 1982 firebird 305 4 barrel carb auto trans
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Loren Champlain Sr
Veteran
/ Moderator
Dec 14, 2008, 8:52 PM
Post #2 of 8
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Re: 1982 firebird starts idles really high then dies
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Sounds like a large vacuum leak? Check all the vacuum lines. Maybe, EGR stuck open?
Loren
SW Washington
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Tom Greenleaf
Ultimate Carjunky
/ Moderator
Dec 15, 2008, 8:47 AM
Post #3 of 8
(2398 views)
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Re: 1982 firebird starts idles really high then dies
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Choke heater and pull offs working properly and set properly on this? Fast idle speed shoud kick right off the factory 1800 rpm setting with first kick of throttle but bet it isn't. Either adjustment is wrong or primary pull off is not pulling off enough. Step cam must be free by gravity alone. Quads are a pest but work excellent with about 4,000 hours of fidling to make them perfect.!!
It might not be that but that sounds like the trouble. If so it really helps to find a good carb person who really knows these quadrajets. Damn - at least 50% of them weren't right when car was brand new!
At the age - everything to do with vacuum (gaskets, hoses etc.,) and the diaphragms must be right and all are suspect,
T
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worrior_6692004
Novice
Dec 16, 2008, 8:02 PM
Post #4 of 8
(2382 views)
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Re: 1982 firebird starts idles really high then dies
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ok now the car will idel fine ok then when i go into drive and start pressing the gas the gar starts to die then if i let off it will get back up so i dont know i dont think the butter flys are opening on that damn carb i think its chokin its selfout would this cause this and also the choke light stays on
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Loren Champlain Sr
Veteran
/ Moderator
Dec 16, 2008, 8:06 PM
Post #5 of 8
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Re: 1982 firebird starts idles really high then dies
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Make certain that you are getting 12V to the choke thermostat. Should be constant voltage, with the engine running. Also, if I remember correctly (been a while) there is a choke 'relay' under the dash that dies and will
keep the thermostat from working.
Loren
SW Washington
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worrior_6692004
Novice
Dec 16, 2008, 8:07 PM
Post #6 of 8
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Re: 1982 firebird starts idles really high then dies
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thanks ok i got new news on this now after i have adjusted the fast idel screw it has idelded down but now when i start it up and go into drive and start giving gas it starts to die unless i let off the gas real fast i dont know how to make sure those choke things work properly and i know the choke light stays on and i dont know if the butterflys are opening all the way on that damn carb thanks for your help i really appreciate it
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worrior_6692004
Novice
Dec 16, 2008, 8:10 PM
Post #7 of 8
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Re: 1982 firebird starts idles really high then dies
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ok thank you i appreciate your help and i have the car ideling fine now but when i put it in drive and start to go the car starts to die unless i get off the gas really quick then it cuts back in
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Tom Greenleaf
Ultimate Carjunky
/ Moderator
Dec 16, 2008, 9:59 PM
Post #8 of 8
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Re: 1982 firebird starts idles really high then dies
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Ok - once warmed and choke off that screw does nothing! There's either another for base idle or a "dashpot" to dampen the return back to idle or even an electric idle control. 1982 - you can put a dwell tach on this and set the speeds to spec or I/we can guess at some that will work for you.
IF YOU ARE MESSING WITH SCREW ON FRONT PULL OFF you will alter the mixture setting which is meant to slowly fade to warmed up mix from the initial cold mix. Choke spring tension is not adjustable TMK on a 1982 and could be trouble and some the heater will quit - should be hot to touch the black cover after several minutes of running and choke strait up and off,
T
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