Vacuum line question/Idle issue
10-09-2015, 09:04 AM
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Vacuum line question/Idle issue
305, quadrajet, new cap and rotor, timing is 4* with the advance connector off.
I am having some odd idle and acceleration problems. Ive replaced the vacuum break on the carb as it wasnt holding vacuum. I noticed there is a 3 prong shaped vac connector down near the evap cannister. One hose back to manifold vacuum, the other to the cannister, the 3rd prong to open air?? - I cant find where its supposed to go. I get immediate vacuum when I start the car there, if I plug it, the car runs worse. Ive done some reading - is this supposed to go to open air? Ill try to post a pic later today.
Im also getting some acceleration issues above 30MPH. It will shake and struggle when the gas pedal is pressed. If I release the throttle and give it time to "catch up" it will smooth out.
Idle is kind of sporadic - from cold start in park its about 1500-2000 PRM, in drive it drops to 1100 or so and idles rough. I think its running rich, im going to replace the plugs and wires and check their condition.
Could be several things, carb probably needs a rebuild, but wondering where to start without throwing a ton of money at it.
I am having some odd idle and acceleration problems. Ive replaced the vacuum break on the carb as it wasnt holding vacuum. I noticed there is a 3 prong shaped vac connector down near the evap cannister. One hose back to manifold vacuum, the other to the cannister, the 3rd prong to open air?? - I cant find where its supposed to go. I get immediate vacuum when I start the car there, if I plug it, the car runs worse. Ive done some reading - is this supposed to go to open air? Ill try to post a pic later today.
Im also getting some acceleration issues above 30MPH. It will shake and struggle when the gas pedal is pressed. If I release the throttle and give it time to "catch up" it will smooth out.
Idle is kind of sporadic - from cold start in park its about 1500-2000 PRM, in drive it drops to 1100 or so and idles rough. I think its running rich, im going to replace the plugs and wires and check their condition.
Could be several things, carb probably needs a rebuild, but wondering where to start without throwing a ton of money at it.
10-09-2015, 02:06 PM
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Re: Vacuum line question/Idle issue
305, quadrajet, new cap and rotor, timing is 4* with the advance connector off.
I am having some odd idle and acceleration problems. Ive replaced the vacuum break on the carb as it wasnt holding vacuum. I noticed there is a 3 prong shaped vac connector down near the evap cannister. One hose back to manifold vacuum, the other to the cannister, the 3rd prong to open air?? - I cant find where its supposed to go. I get immediate vacuum when I start the car there, if I plug it, the car runs worse. Ive done some reading - is this supposed to go to open air? Ill try to post a pic later today.
Im also getting some acceleration issues above 30MPH. It will shake and struggle when the gas pedal is pressed. If I release the throttle and give it time to "catch up" it will smooth out.
Idle is kind of sporadic - from cold start in park its about 1500-2000 PRM, in drive it drops to 1100 or so and idles rough. I think its running rich, im going to replace the plugs and wires and check their condition.
Could be several things, carb probably needs a rebuild, but wondering where to start without throwing a ton of money at it.
I am having some odd idle and acceleration problems. Ive replaced the vacuum break on the carb as it wasnt holding vacuum. I noticed there is a 3 prong shaped vac connector down near the evap cannister. One hose back to manifold vacuum, the other to the cannister, the 3rd prong to open air?? - I cant find where its supposed to go. I get immediate vacuum when I start the car there, if I plug it, the car runs worse. Ive done some reading - is this supposed to go to open air? Ill try to post a pic later today.
Im also getting some acceleration issues above 30MPH. It will shake and struggle when the gas pedal is pressed. If I release the throttle and give it time to "catch up" it will smooth out.
Idle is kind of sporadic - from cold start in park its about 1500-2000 PRM, in drive it drops to 1100 or so and idles rough. I think its running rich, im going to replace the plugs and wires and check their condition.
Could be several things, carb probably needs a rebuild, but wondering where to start without throwing a ton of money at it.
10-09-2015, 03:05 PM
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Car: 1984 Chevrolet Camaro Z28
Engine: 5.0 Liter 4-BBL V8 High Output
Transmission: 5-Speed Manual
Axle/Gears: 3.73
Re: Vacuum line question/Idle issue
What Year And Model Is It,I Checked Mine But It's A Different Set Up.
Last edited by gt4373; 10-09-2015 at 04:28 PM.
10-09-2015, 04:18 PM
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10-10-2015, 03:28 PM
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Re: Vacuum line question/Idle issue
You can probably still buy them. Or just yank one from another 3rd Gen. Mounts up inside the driver's side fender/front.
"The Black Orb of Power!!" ... or so I've called them in the past.
"The Black Orb of Power!!" ... or so I've called them in the past.
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