Re: Power Valve
[Re: 72 RR DUDE]
#2681423
07/25/19 09:36 PM
07/25/19 09:36 PM
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Joined: Jan 2003
Posts: 14,543 So. Burlington, Vt.
fast68plymouth
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 14,543
So. Burlington, Vt.
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Ok so i just found the problem. When i took the accelerator pump off the check wall and little brass strip that holds the ball in place fell out. The only thing i don,t know is how to keep the brass piece in place. Anybody no???? Well...... you found “a” problem...... but that doesn’t really explain the empty float bowl and not staying running below 2000.
68 Satellite, 383 with stock 906’s, 3550lbs, 11.18@123 Dealer for Comp Cams/Indy Heads
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Re: Power Valve
[Re: fast68plymouth]
#2681468
07/26/19 01:13 AM
07/26/19 01:13 AM
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Joined: Jan 2003
Posts: 27,421 Balt. Md
383man
Too Many Posts
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Too Many Posts
Joined: Jan 2003
Posts: 27,421
Balt. Md
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Ok so i just found the problem. When i took the accelerator pump off the check wall and little brass strip that holds the ball in place fell out. The only thing i don,t know is how to keep the brass piece in place. Anybody no???? Well...... you found “a” problem...... but that doesn’t really explain the empty float bowl and not staying running below 2000. I agree as that's just the acell pump inlet check ball. All that will do is let the pump push fuel out the inlet when you step on it instead of pushing all the fuel in the pump housing out to the discharge check ball and out the pump shooters. It would just cause a stumble when stepping on the gas. That wont cause it to loose fuel or run rich. But it is a problem that you should fix of course. Ron
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Re: Power Valve
[Re: 72 RR DUDE]
#2681504
07/26/19 09:17 AM
07/26/19 09:17 AM
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Joined: Mar 2007
Posts: 3,298 West Coast, USA
jbc426
master
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master
Joined: Mar 2007
Posts: 3,298
West Coast, USA
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Installing a wideband A/F gauge in my 6 pack car has become a long overdue addition, and I highly recommend them to keep a tab on how my carbs are working and for dialing them in.
Change all your fuel filters. Check all the float levels as mentioned above. Disassemble and inspect each carb and put in a fresh power valve in the center one. Which valve one are you running by the way? I regularly give the needle and seat screw a sharp wrap with the but of a big screw driver to clear any debris that may be working its way into the seat area, which helps my peace of mind, but it has dislodged some debris every now and again over the years while on the open road..
Hopefully you have the reusable gaskets on there already. The needle and seats vary significantly on their ability to control higher than 6 psi fuel pressure. Some will hold upwards of 11 psi, but I digress.
Good catch on the accelerator pump. That one could have gone unnoticed for a while.
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: Power Valve
[Re: fast68plymouth]
#2681936
07/28/19 06:14 AM
07/28/19 06:14 AM
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Joined: Jul 2003
Posts: 5,188 upstate western ny
sogtx
master
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master
Joined: Jul 2003
Posts: 5,188
upstate western ny
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Needle and seat is stuck more than likely.
Don’t even have to pull the carb for that.
I like to have the fuel level sitting at the bottom of the site plug hole, and not really running out. Didn't read to bottom yet suspect this , most common !
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Re: Power Valve
[Re: 72 RR DUDE]
#2682015
07/28/19 12:28 PM
07/28/19 12:28 PM
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Joined: Jan 2003
Posts: 9,436 Blair County,PA
62maxwgn
master
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master
Joined: Jan 2003
Posts: 9,436
Blair County,PA
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I really didn,t stubble on to it i just figured that if i had fuel in the bowl which i did and when i hand throttled it while not running and there was no gas coming out looking in the carb that it had to be something in the accelerator area. The little strap that hold the ball in place sit,s in between 2 little tab,s that get slighty folded over and it looked like it was done very poor'y. If it happens again,a drop of JB Weld will fix that or you can go to the later umbrella style valve.
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Re: Power Valve
[Re: 72 RR DUDE]
#2682179
07/28/19 11:21 PM
07/28/19 11:21 PM
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Joined: Jan 2003
Posts: 9,436 Blair County,PA
62maxwgn
master
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master
Joined: Jan 2003
Posts: 9,436
Blair County,PA
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I've heard that Holley has updated the style so can you use the new style on the old style bowl and where can you buy one? Remove the retainer and ball,goes right in.Everyone has them,Summit,Jegs,Advance Auto etc.Just check price,they run anywhere from $4.50 n Ebay upwards to $20 depending on the seller.Send me your address and I'll send you one,have a bunch of extras.
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