Dead rich, nothing helps. Fixed
#1464122
07/07/13 06:15 PM
07/07/13 06:15 PM
|
Joined: Apr 2008
Posts: 273 FL
74-440Charger
OP
enthusiast
|
OP
enthusiast
Joined: Apr 2008
Posts: 273
FL
|
Trouble is with a Holley 4150 HP 750 cfm w/vac 2nds on a mild 440. Motor has been sitting for about a year, I replaced the plugs and wires, power valve, needle and seat assemblies, checked float levels and verified spark. Plugs are black as coal and doesn't want to idle. Ideas would be greatly appreciated. Everyone who said power valve raise your hand . I pulled it apart again to swap in another power valve, noticed a piece of gasket left from the old PV and it wasn't as tight as it could be. I stripped it al down and soaked in a new can of chem-dip and put it all together cleaner and more carefully this time. Fired right up, idle fell right in place and tweaked the timing right in. You folks are the best
Last edited by 74-440Charger; 07/08/13 10:42 PM.
|
|
|
Re: Dead rich, nothing helps
[Re: RobX4406]
#1464124
07/07/13 06:22 PM
07/07/13 06:22 PM
|
Joined: Apr 2008
Posts: 273 FL
74-440Charger
OP
enthusiast
|
OP
enthusiast
Joined: Apr 2008
Posts: 273
FL
|
|
|
|
Re: Dead rich, nothing helps
[Re: 74-440Charger]
#1464128
07/07/13 07:34 PM
07/07/13 07:34 PM
|
Joined: Nov 2003
Posts: 36,040 Lincoln Nebraska
RapidRobert
Circle Track
|
Circle Track
Joined: Nov 2003
Posts: 36,040
Lincoln Nebraska
|
It ran OK a year ago when it was parked with no changes since then. I'm assuming the fuel psi ain't too high & the PV ain't blown. What's your idle speed? It's showing 30 initial? On ported or manifold vacuum? I'd want the initial at ~15. Find out what's wonky with the timing reading. Holler back when you can
live every 24 hour block of time like it's your last day on earth
|
|
|
Re: Dead rich, nothing helps
[Re: topside]
#1464131
07/07/13 07:56 PM
07/07/13 07:56 PM
|
Joined: May 2003
Posts: 1,751 Graham, WA
Polarapete
top fuel
|
top fuel
Joined: May 2003
Posts: 1,751
Graham, WA
|
It sure seems that it is a power valve problem to me. I used to do mobile service calls and had one in the SeaTac Airpot parking garage with a Rambler V-8 and a Holley. I was able to get the family home by plugging the blown PV with JB weld with the advise that they could only use part throttle to get them home (85 miles)and then have the PV replaced by their local mechanic. I would try a PV plug and see if that cleans up the idle. Couldn't hurt to try.
1986 Dodge Ramcharger 440 2wd, Bracket Racer Under Construction 1998 Ram 2500 QuadCab, new daily driver. 2008 Honda Element 2014 Carry-On 7x14 Cargo Trailer
|
|
|
Re: Dead rich, nothing helps
[Re: 74-440Charger]
#1464133
07/07/13 10:12 PM
07/07/13 10:12 PM
|
Joined: Mar 2008
Posts: 5,746 Ontario, Canada
Dodgem
master
|
master
Joined: Mar 2008
Posts: 5,746
Ontario, Canada
|
could be the coil, or MSD rusted inside. sure sounds like a bad power valve did you get the gasket in tight?? got another to try. I've seen the block to main body gaskets do the rich thing too. Do you have a good running carb to borrow and swap on. Do you still run the ballast resistor if so run a double male spade to join the wires. you put fresh fuel in?
|
|
|
Re: Dead rich, nothing helps
[Re: 74-440Charger]
#1464134
07/07/13 10:15 PM
07/07/13 10:15 PM
|
Joined: Mar 2008
Posts: 5,746 Ontario, Canada
Dodgem
master
|
master
Joined: Mar 2008
Posts: 5,746
Ontario, Canada
|
I once bought a 3 barrel they said many different carb experts looked at and it runs pig rich.
so i paid 80 buck for it telling my buddy I was sure it was the power valve.
And it was piece of gasket material stuck in it.
problem solved ran good sold it a couple years later for $150.
wish I still had it to play with.
Last edited by Dodgem; 07/07/13 10:16 PM.
|
|
|
Re: Dead rich, nothing helps
[Re: 74-440Charger]
#1464136
07/07/13 10:43 PM
07/07/13 10:43 PM
|
Joined: Nov 2003
Posts: 36,040 Lincoln Nebraska
RapidRobert
Circle Track
|
Circle Track
Joined: Nov 2003
Posts: 36,040
Lincoln Nebraska
|
Assuming the throttle blades are closed down normally to where you are on the idle circuit if you then screw in the idle mixture screws all the way & it keeps idling then the PV is blown (the idle circuit is getting fed improperly from the PV)
live every 24 hour block of time like it's your last day on earth
|
|
|
|
|