Re: Help with engine running very rich
[Re: AndyF]
#1818936
05/04/15 11:19 PM
05/04/15 11:19 PM
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Joined: Jun 2007
Posts: 1,187 clarks summit pa
73cuda340
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I pulled the tops of both carbs off and it was clean inside. No white slime or residue from the ethanol. Pulled out the needle and seats and they were clean too. I cleaned everything up with carb cleaner, rechecked the float adjustment and put everything back together and it still wont idle by itself and it is still leaking gas out of the boosters. If I give it just a little gas it will stay running, but it still has very strong fumes from the exhaust that will burn your eyes even after a few seconds of it running. I'm ordering the fuel pressure regulator tonight and I'm really hoping that this will be the end to the problem. I appreciate all the help so far.
1973 Cuda 528 all aluminum Hemi, 4 speed, 3.23 Sure-Grip,
(JA5) Silver Frost Metallic
1973 Challenger Rallye 340
1985 W150 Power Ram prospector
1986 Camaro IROC-Z 305 tpi
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Re: Help with engine running very rich
[Re: 73cuda340]
#1818988
05/04/15 11:55 PM
05/04/15 11:55 PM
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Joined: Sep 2007
Posts: 14,889 up yours
Supercuda
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Did you verify the floats were not leaky? If so, how?
They say there are no such thing as a stupid question. They say there is always the exception that proves the rule. Don't be the exception.
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Re: Help with engine running very rich
[Re: Supercuda]
#1819030
05/05/15 12:23 AM
05/05/15 12:23 AM
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Joined: Jun 2007
Posts: 1,187 clarks summit pa
73cuda340
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Did you verify the floats were not leaky? If so, how? They were floating on the gas that was in the bowls and when I pulled them out they were not full of gas.
1973 Cuda 528 all aluminum Hemi, 4 speed, 3.23 Sure-Grip,
(JA5) Silver Frost Metallic
1973 Challenger Rallye 340
1985 W150 Power Ram prospector
1986 Camaro IROC-Z 305 tpi
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Re: Help with engine running very rich
[Re: 73cuda340]
#1819053
05/05/15 12:48 AM
05/05/15 12:48 AM
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Joined: Sep 2007
Posts: 14,889 up yours
Supercuda
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Did you shake them and listen for slosh? Doesn't take much to keep the needles from seating. Had it happen twice to me over the years. First time I resoldered the seam, couple years later I just replaced them.
They say there are no such thing as a stupid question. They say there is always the exception that proves the rule. Don't be the exception.
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Re: Help with engine running very rich
[Re: Supercuda]
#1819086
05/05/15 01:19 AM
05/05/15 01:19 AM
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Joined: Jun 2007
Posts: 1,187 clarks summit pa
73cuda340
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Did you shake them and listen for slosh? Doesn't take much to keep the needles from seating. Had it happen twice to me over the years. First time I resoldered the seam, couple years later I just replaced them. I didn't shake them, but I did take them off to clean the needle and seats and I couldn't hear anything moving around and they were very light so I'm almost positive that they are still good.
1973 Cuda 528 all aluminum Hemi, 4 speed, 3.23 Sure-Grip,
(JA5) Silver Frost Metallic
1973 Challenger Rallye 340
1985 W150 Power Ram prospector
1986 Camaro IROC-Z 305 tpi
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Re: Help with engine running very rich
[Re: 73cuda340]
#1825300
05/12/15 11:27 PM
05/12/15 11:27 PM
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Posts: 1,187 clarks summit pa
73cuda340
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I got the fuel pressure regulator installed and it does seem to run a little better and nowhere near as rich, however the problem is still there and I cant get the car to idle. I have the regulator set to 6 psi. I pulled out all the idle mixture screws and sprayed some carb cleaner in there and into the air bleeds as well. Does this sound like an idle circuit problem? I still cant get the car to idle by itself to see if everything else is okay.
1973 Cuda 528 all aluminum Hemi, 4 speed, 3.23 Sure-Grip,
(JA5) Silver Frost Metallic
1973 Challenger Rallye 340
1985 W150 Power Ram prospector
1986 Camaro IROC-Z 305 tpi
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Re: Help with engine running very rich
[Re: 73cuda340]
#1826843
05/14/15 08:36 PM
05/14/15 08:36 PM
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Joined: Jun 2007
Posts: 1,187 clarks summit pa
73cuda340
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The only way that I can get the car to idle is if I turn the idle up to around 1500-2000 rpm; I'm not sure as My car doesn't have a tach. The vacuum was at 5 in/hg and when I looked at the metering rods, they appeared to be bouncing up and down a little bit. Im not sure if the vacuum is that low or the metering rods are bouncing slightly because of the idle being so high.
1973 Cuda 528 all aluminum Hemi, 4 speed, 3.23 Sure-Grip,
(JA5) Silver Frost Metallic
1973 Challenger Rallye 340
1985 W150 Power Ram prospector
1986 Camaro IROC-Z 305 tpi
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Re: Help with engine running very rich
[Re: 70Duster440]
#1829696
05/18/15 11:39 PM
05/18/15 11:39 PM
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Joined: Jun 2007
Posts: 1,187 clarks summit pa
73cuda340
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clarks summit pa
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I took the whole carburetor apart again, cleaned everything again, lowered the floats a little more, and dropped the fuel pressure down to 5 psi and the car still will not idle. It is still running rich too. It only wants to idle at roughly 1500 rpm. I can sill see gas coming out of the boosters, but I believe the only reason now is because of how high the idle is. I am pretty much at a loss of what to do at this point.
Last edited by 73cuda340; 05/19/15 08:00 PM.
1973 Cuda 528 all aluminum Hemi, 4 speed, 3.23 Sure-Grip,
(JA5) Silver Frost Metallic
1973 Challenger Rallye 340
1985 W150 Power Ram prospector
1986 Camaro IROC-Z 305 tpi
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Re: Help with engine running very rich
[Re: 70Duster440]
#1830272
05/19/15 07:59 PM
05/19/15 07:59 PM
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Joined: Jun 2007
Posts: 1,187 clarks summit pa
73cuda340
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clarks summit pa
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You raised the float? That would make the problem worse. If you lower the float it will shut the fuel off at lower level in the bowl. My bad, just a typing mistake. I lowered the float.
1973 Cuda 528 all aluminum Hemi, 4 speed, 3.23 Sure-Grip,
(JA5) Silver Frost Metallic
1973 Challenger Rallye 340
1985 W150 Power Ram prospector
1986 Camaro IROC-Z 305 tpi
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Re: Help with engine running very rich
[Re: 73cuda340]
#1831053
05/20/15 08:27 PM
05/20/15 08:27 PM
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Joined: Jun 2007
Posts: 1,187 clarks summit pa
73cuda340
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super stock
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clarks summit pa
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Does anybody here have a hemi, preferably 528, and know an average vacuum reading at idle?
1973 Cuda 528 all aluminum Hemi, 4 speed, 3.23 Sure-Grip,
(JA5) Silver Frost Metallic
1973 Challenger Rallye 340
1985 W150 Power Ram prospector
1986 Camaro IROC-Z 305 tpi
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Re: Help with engine running very rich
[Re: 73cuda340]
#1836812
05/29/15 06:00 PM
05/29/15 06:00 PM
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Joined: Jun 2007
Posts: 1,187 clarks summit pa
73cuda340
OP
super stock
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OP
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clarks summit pa
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Is there a set adjustment as to how far the primary throttle blades should be open at idle?
1973 Cuda 528 all aluminum Hemi, 4 speed, 3.23 Sure-Grip,
(JA5) Silver Frost Metallic
1973 Challenger Rallye 340
1985 W150 Power Ram prospector
1986 Camaro IROC-Z 305 tpi
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