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Author
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Topic: Carb help, or ???
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Fastymz
Moderator Posts: 20708
From: Reno Nv USA M&M#1240
Registered: Apr 2001
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posted 08-06-2004 02:16 AM
   
Since I've been cruising around alot and mostly waiting in traffic. My car will idle alittle more rough and idle down alittle if I rev it up it seems to go away,for a some time. And it I don't rev it and just start driving it kinda of hesitates then runs great.
I have not changed anything on the motor. Don't know why it just started to do this ?I'm thinking maybe a PV ?
Other wise it runs and idles good, only if it sits at idle for sometime does it act up. Any advice ? ------------------
SCOOP oddly obsessed with big scoops on little Mustangs 65 coupe,351w,C4,Big Boss 429 hood scoop,8" 3.40 TracLoc. My Pics Caution, keep kids and small pets away from the scoop.
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68F100
Gearhead Posts: 2609
From: Burlington, Iowa
Registered: Oct 99
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posted 08-06-2004 11:09 AM
Just sounds like it is loading up at long idles. Couldn't tell ya how to fix it though. I'm still trying to get up the nerve to mess with mine.
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Fastymz
Moderator Posts: 20708
From: Reno Nv USA M&M#1240
Registered: Apr 2001
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posted 08-06-2004 12:18 PM
Thats what I was thinking too Joe, but I don't know why it's doing that,and how to make it better ?------------------
SCOOP oddly obsessed with big scoops on little Mustangs 65 coupe,351w,C4,Big Boss 429 hood scoop,8" 3.40 TracLoc. My Pics
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Mpcoluv
Gearhead Posts: 1333
From: Charlotte NC usa
Registered: Apr 2001
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posted 08-06-2004 01:03 PM
It sounds like it's loading up to me also.
You need to lean out the idle mixture.
You have a holley right?
Try to adjust you idle mixture screws a little leaner.
Is your ignition powerful enough?
I seem to remember that your cam is not too radical....so you really shouldn't have this problem.
Also make sure that the idle air bleeds are not blocked...
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MidLifCrisis
Gearhead Posts: 540
From: Frederick County, MD
Registered: Oct 2001
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posted 08-06-2004 09:31 PM
wildfire466
Gearhead
Posts: 353
From: Cali
Registered: Mar 2004
posted 06-27-2004 11:19 PM
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I'm also thinking that the power valve in your carb might be the wrong one for your application. Last idea, you may wish to pull the carb and see if the throttle plates are into the idle transfer slot. What happens here is your pulling fuel from the idle transfer and then you have to lean out the idle screws. Idle effect WOT believe it or not. How many turns out are the idle screws?
Les ------------------
http://www.geocities.com/wildfire1mustang/ wildfire466 said it best. I found a little headless screw under the secondary diaphragm that opened up the secondaries to increase idle without opening the primaries. Hope this helps. Charlie
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steve'66
Gearhead Posts: 9489
From: Sonoma,CA,USA
Registered: Mar 2000
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posted 08-06-2004 09:47 PM
Hey Scoop,I'll be in V.C. Monday and Tuesday, can I make a house call?  SteveW
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Fastymz
Moderator Posts: 20708
From: Reno Nv USA M&M#1240
Registered: Apr 2001
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posted 08-07-2004 11:41 AM
Steve, Monday you could come by my work, I'll bring the car. or might be off on Tuesday let me know which one is better for you ? You have mail too, it's kinda of a cool story. ------------------
SCOOP oddly obsessed with big scoops on little Mustangs 65 coupe,351w,C4,Big Boss 429 hood scoop,8" 3.40 TracLoc. My Pics [This message has been edited by Fastymz (edited 08-07-2004).]
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Fastymz
Moderator Posts: 20708
From: Reno Nv USA M&M#1240
Registered: Apr 2001
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posted 08-07-2004 02:00 PM
I leaned out the A/F mixture alittle it didn't help. The car starts and runs great,until it idles once it's warmed up. Then it does the rough idle and idles down alittle. Once I rev it or drive it, it goes away for a short time. The only thing I did was change the fuel filter with the same model. I have not had the time to clean air bleeds yet. I can't think of anything that would have blow out the PV. Except maybe when it was at the paint shop ? ------------------
SCOOP oddly obsessed with big scoops on little Mustangs 65 coupe,351w,C4,Big Boss 429 hood scoop,8" 3.40 TracLoc. My Pics [This message has been edited by Fastymz (edited 08-07-2004).]
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Mpcoluv
Gearhead Posts: 1333
From: Charlotte NC usa
Registered: Apr 2001
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posted 08-07-2004 05:00 PM
Can you look down into the carb while this bad behavior is happening?
Is fuel drooling from the boosters?
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steve'66
Gearhead Posts: 9489
From: Sonoma,CA,USA
Registered: Mar 2000
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posted 08-07-2004 05:33 PM
Cool story Ron,You're like a long lost Cousin.  Glen and I've been getting the motorhome ready for the trip to Eureka's Samoa Drag strip next weekend. SteveW
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Fastymz
Moderator Posts: 20708
From: Reno Nv USA M&M#1240
Registered: Apr 2001
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posted 08-07-2004 07:10 PM
quote:
Originally posted by steve'66:
Cool story Ron,You're like a long lost Cousin. Glen and I've been getting the motorhome ready for the trip to Eureka's Samoa Drag strip next weekend. SteveW
Yeah we are like family.  Aren't you the lucky one  ------------------
SCOOP oddly obsessed with big scoops on little Mustangs 65 coupe,351w,C4,Big Boss 429 hood scoop,8" 3.40 TracLoc. My Pics
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steve'66
Gearhead Posts: 9489
From: Sonoma,CA,USA
Registered: Mar 2000
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posted 08-07-2004 07:15 PM
I always treated you like a little brother anyway. Huh?? SteveW
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Fastymz
Moderator Posts: 20708
From: Reno Nv USA M&M#1240
Registered: Apr 2001
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posted 08-07-2004 07:37 PM
Yeah you have, thats cool to know that we are kinda family. ------------------
SCOOP oddly obsessed with big scoops on little Mustangs 65 coupe,351w,C4,Big Boss 429 hood scoop,8" 3.40 TracLoc. My Pics
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