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#454030 - 10/07/07 08:59 AM
own an 81 olds regency
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kilrcady
New Member
Registered: 10/07/07
Posts: 4
Loc: New Jersey
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I have a problem with the carb.I had it rebuilt and new gas tank installed and a new fuel pump.The car runs great.When it sits for more than a day the carb loses all the fuel from the bowl.Like I said I tried everything I could think of.I even disconnected the charcoal filter.Still no difference.It starts right up if I spray starting fuid into the carb.HELP!!
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#459532 - 10/28/07 09:39 PM
Re: own an 81 olds regency
[Re: kilrcady]
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pitt64
Member
Registered: 09/30/05
Posts: 256
Loc: Pittsburgh, Pa
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My 83 Olds 98 with a 307 has been like that for over 100,000 miles.
PS) I sware these Oldsmobiles are the best cars ever made.
_________________________
Jeff
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#459637 - 10/29/07 11:39 AM
Re: own an 81 olds regency
[Re: kilrcady]
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joe_padavano
Member
Registered: 08/21/06
Posts: 308
Loc: Northern VA
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Have you actually removed the top of the carb after the car has sat for a few days to verify there is no fuel in the float bowl, or are you just assuming this? If you're pumping the accelerator and not seeing the accelerator pump squirting fuel, this could be due to a bad pump cup or plugged nozzles.
One easy way to check the fuel level without pulling the top off the carb is to use a level stick through the vent. There's actually a calibrated tool for checking float level, but in your case a piece of plastic works fine. Simply mark the float level right after you shut the car off then check it again in a few days. If it's the same, you aren't losing fuel.
If you're truly losing fuel, either the plugs in the bottom of the float bowl are leaking (not an uncommon thing for a Qjet), there's a bad check valve in the fuel pump, or there's some unusual evaporation going on.
One other slim possibility is that the evap system is plugged and there's pressure building up that forces fuel out of the jets when the car is sitting.
_________________________
Joe Padavano
OCA Capital City Rockets chapter
64 Jetstar 88
66 442 conv
68 W-30
69 H/O
69 442
70 W-30
72 442
86 Caprice wagon (w/307 Olds)
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#462335 - 11/06/07 06:00 PM
Re: own an 81 olds regency
[Re: pfloro]
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kilrcady
New Member
Registered: 10/07/07
Posts: 4
Loc: New Jersey
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First off The carb was rebuilt by a major carb rebuilder .Not replaced but rebuilt.I live in New Jersey.I was told to check the carcoal canister that this could go bad and suck fuel back.I disconnected the the vaccumm hose and still had the problem.The latest news.On a whim,I lossened the gas cap and left it loose.The thinking is that the tank wasn't venting properly.So far this may be the fault.I didn't have this problem before the tank was replaced due to rust.When the weather warms again,i will get under the car and see if all is in order.
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#463571 - 11/11/07 12:39 PM
Re: own an 81 olds regency
[Re: talarico8447]
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kilrcady
New Member
Registered: 10/07/07
Posts: 4
Loc: New Jersey
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Ok the problem happens when its cold or hot outside.Once warmed up its good for two or three days and works properly.I assume no gas because if you pump the carb while looking down the carb no gas squirts.I remove the carb and turn it over and no gas comes out.Like I said the car starts,runs and drive beutifly but once it sits for few (3 or more days) it won't start without the assistance of fuel or starting fluid.I'm going to try a check valve in the fuel line next.I'm also going to check out the evap system more closely. Fuel is definity leaving the carb after it sits for a while.whether buy evaporation or drain back or waht might be a negative pressure on the fuel system.This is my Father in laws car and he feels i'm his personal mechanic.So I should have plenty of time to do all this for him.Its all stock including the pollution equipment.The car is in really fine shape with low miles.He won't tell me but I think it all started when they(others) put in a new tank due to rust.Which is also makeing me look to the pick up in the tank.I have 4 other cars of my own to matain and I really dread dropping the tank.
73 Corvette
77 Cadillac Coupe DeVille(Blown Big Block)
83 280zx
96 Dodge ram
Edited by kilrcady (11/11/07 12:43 PM)
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#489274 - 02/22/08 05:02 PM
Re: own an 81 olds regency
[Re: kilrcady]
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kilrcady
New Member
Registered: 10/07/07
Posts: 4
Loc: New Jersey
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UPDATE.I took the car to another repair guy that said he would take a look at it.He was going nuts too.He was about to install an electric pump.He was looking for a good location for it when he found an inline fuel filter (after market) installed in the system.I was under this car all over the place and saw nothing.He had it on a lift and it was in a spot where you wouldn't be able to see it on your back.I guess whent they put all new lines,tank,pump and carb they put some extra insurance and didn't tell anyone.Replaced the filter with a piece of line and so far all is great.There is a filter at the carb.Thanks guys for all your help.
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