Six pack issues after rebuild
#2752685
03/16/20 09:57 PM
03/16/20 09:57 PM
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Joined: May 2010
Posts: 177 NC
Sixt8Chrgr
OP
member
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OP
member
Joined: May 2010
Posts: 177
NC
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I have an AAR, automatic, manifolds, basically stock. The car ran well before I rebuilt the carbs except for the fact, there was an internal fuel leak, car flooded after it sat for a few minutes, and the carbs were leaking bad. The car had been sitting up for 20 years. I pulled the carbs, re-jetted, new gaskets, new PV, cleaned everything very well. When I put the carbs back on the car it fired right up and I adjusted the center carb air/fuel ratio to 2 turns from seat. I did not remove the plugs and adjust the screws on the outboard carbs. While driving the car it progressively started running worse, and dies at a stop sign. I have to give it gas to get it to fire back up. It does seem as if it is running rich. I don't have any external obvious leaks. I did adjust all three floats so I have slight gas seepage out of sight bowl screw when I bump the car. I feel like the PV is leaking, bad or some trash found its was in the idle circuit of the center carb. I will say it acts like I have a vacuum leak too, but don't see any evidence of this.
Any help is appreciated.
Thanks
Last edited by Sixt8Chrgr; 03/17/20 07:44 AM.
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Re: Tri-power idle issues after rebuild
[Re: Sixt8Chrgr]
#2752694
03/16/20 10:22 PM
03/16/20 10:22 PM
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Joined: Jan 2003
Posts: 12,075 Benton, IL.
DaveRS23
Special needs idiot
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Special needs idiot
Joined: Jan 2003
Posts: 12,075
Benton, IL.
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Tri power????????? You believe it is running rich AND might have a vacuum leak. With more than one problem to track down, you might be ahead to have a Holley carb guy look at it. Without some experience, multiple problems at once can be a bear to unravel. But for one thing, if you think it is a bad power valve, most auto supplies will have a 6.5 in stock for $10 or so. Throw one in, just to see.
Last edited by DaveRS23; 03/16/20 10:23 PM.
Master, again and still
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Re: Tri-power idle issues after rebuild
[Re: Sixt8Chrgr]
#2753768
03/20/20 11:07 AM
03/20/20 11:07 AM
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Joined: Mar 2007
Posts: 3,277 West Coast, USA
jbc426
master
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master
Joined: Mar 2007
Posts: 3,277
West Coast, USA
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One of the outboard carbs needle and seat was contaminated. I got the engine running a lot better but still not 100%. I think I may have a small vacuum leak. I will hunt that down.
Thanks for the help. You can spray brake or carb cleaner around the carbs, intake and vacuum lines to quickly find any vacuum leaks. Adding a wide band to your car will really help in sorting out cab issues. What do you have your initial and total timing set at? Needle and seat performance varies pretty widely. I have gone through several sets to find really good pairs.
1970 Plymouth 'Cuda #'s 440-6(block in storage)currently 493" 6 pack, Shaker, 5 speed Passon, 4.10's 1968 Plymouth Barracuda Convertible 408 Magnum EFI with 4 speed automatic overdrive, 3800 stall lock-up converter and 4.30's (closest thing to an automatic 5 speed going)
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Re: Tri-power idle issues after rebuild
[Re: TJP]
#2754444
03/22/20 09:53 AM
03/22/20 09:53 AM
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Joined: May 2010
Posts: 177 NC
Sixt8Chrgr
OP
member
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OP
member
Joined: May 2010
Posts: 177
NC
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I used this info in this link to help with my issues. https://board.moparts.org/ubbthreads/ubbthreads.php/topics/373854/1.htmlI admit I did not adjust the air/fuel ratio in my outboard carbs...yet. But did adjust the center carb of course and have that adjusted well. By adjusting the float level higher than spec made my car run better. I tried to adjust the idle with the solenoid de-energized and then energized and did not have get it to react as is written. At the moment by curb idle is approximately 900 RPM's with the solenoid energized. At the moment the car is running well. Thanks for all the posts.
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Re: Tri-power idle issues after rebuild
[Re: Sixt8Chrgr]
#2754540
03/22/20 12:47 PM
03/22/20 12:47 PM
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Joined: Jan 2003
Posts: 15,355 Omaha Ne
TJP
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 15,355
Omaha Ne
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