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Yeah, It's Me Again
#3134050
03/31/23 09:34 PM
03/31/23 09:34 PM
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Joined: Jan 2003
Posts: 7,861
Witness Protection Program
Kudakidd
OP
master
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OP
master
Joined: Jan 2003
Posts: 7,861
Witness Protection Program
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Still going through the teething pains. The stock 440 in my car still hesitates,back fires and stumbles under hard acceleration. Other than that annoying and aggravating trait, it starts right up, idles forever and runs smoothly under partial acceleration. It is a four gear car, btw. What I've done so far: Replaced the fuel pump, adjusted the BRAND NEW Holley's float bowl levels, tuned up the idle mixture screws, replaced the coil, replaced the condenser, spark plugs and ballast resistor. HELP ME. I have rusty razor blades near my wrists.
Last edited by Kudakidd; 03/31/23 09:50 PM.
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Re: Yeah, It's Me Again
[Re: Kudakidd]
#3134127
04/01/23 10:35 AM
04/01/23 10:35 AM
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Joined: Jun 2006
Posts: 5,164
CT
GTX MATT
master
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master
Joined: Jun 2006
Posts: 5,164
CT
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Incorrect point gap/dwell
Now I need to pin those needles, got to feel that heat
Hear my motor screamin while I'm tearin up the street
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Re: Yeah, It's Me Again
[Re: Dcuda69]
#3134140
04/01/23 11:25 AM
04/01/23 11:25 AM
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Joined: Feb 2014
Posts: 1,710
central il.
second 70
top fuel
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top fuel
Joined: Feb 2014
Posts: 1,710
central il.
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A cam with lobes going flat will pop through the carb under accel. I had a girl friends car years ago act just like that and thought it was the carb and I took it by a friends shop and he laughed and said it ain't the carb the cams flat.
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Re: Yeah, It's Me Again
[Re: second 70]
#3134186
04/01/23 02:51 PM
04/01/23 02:51 PM
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Joined: Dec 2012
Posts: 257
Alberta
440_Offroader
enthusiast
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enthusiast
Joined: Dec 2012
Posts: 257
Alberta
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Burnt valve? I'd do a compression test and see what the cylinder pressures are like. Accelerator pumps? Checking this with the engine not running, is easy to do. An AFR gauge would be helpful in this situation as well.
Dang, Andrew treed me on the accelerator pumps....
Last edited by 440_Offroader; 04/01/23 02:56 PM.
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Re: Yeah, It's Me Again
[Re: Andrewh]
#3134244
04/01/23 05:56 PM
04/01/23 05:56 PM
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Joined: Jan 2003
Posts: 7,861
Witness Protection Program
Kudakidd
OP
master
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OP
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Joined: Jan 2003
Posts: 7,861
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what kind of distributor?
what cams do you have on the accelerator pump on the holley?
had one that had some weird vacuum leak in the vacuum advance pot and would cause the car to pop and sputter under hard acceleration. unplugged the advance and it fixed it. The pink cams. And what the hell is this talk about burned valves and flat cam lobes. You guys are overthinking this. It's a baffling problem, but I'm sure it's a simple fix. I'm surprised no one suggested rebuilding the engine!
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Re: Yeah, It's Me Again
[Re: Kudakidd]
#3134245
04/01/23 06:05 PM
04/01/23 06:05 PM
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Joined: Jan 2003
Posts: 21,526
N.E. OHIO, USA
A12
Too Many Posts
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Too Many Posts
Joined: Jan 2003
Posts: 21,526
N.E. OHIO, USA
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what kind of distributor?
what cams do you have on the accelerator pump on the holley?
had one that had some weird vacuum leak in the vacuum advance pot and would cause the car to pop and sputter under hard acceleration. unplugged the advance and it fixed it. The pink cams. And what the hell is this talk about burned valves and flat cam lobes. You guys are overthinking this. It's a baffling problem, but I'm sure it's a simple fix. I'm surprised no one suggested rebuilding the engine!
Have you rebuilt the engine since your first post on this?   I still think it's a worn distributor if it is original to the car. (DAMHIK and why I think this)
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Re: Yeah, It's Me Again
[Re: Kudakidd]
#3134248
04/01/23 06:09 PM
04/01/23 06:09 PM
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Joined: Jan 2003
Posts: 18,425
UPPER MICHIGAN, MARQUETTE COUN...
NITROUSN
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 18,425
UPPER MICHIGAN, MARQUETTE COUN...
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what kind of distributor?
what cams do you have on the accelerator pump on the holley?
had one that had some weird vacuum leak in the vacuum advance pot and would cause the car to pop and sputter under hard acceleration. unplugged the advance and it fixed it. The pink cams. And what the hell is this talk about burned valves and flat cam lobes. You guys are overthinking this. It's a baffling problem, but I'm sure it's a simple fix. I'm surprised no one suggested rebuilding the engine! Well if it was that simple you should of had it fixed by now. You have been trying to fix it for months. Time to get it in the hands of someone smart enough to diagnose and fix it.
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Re: Yeah, It's Me Again
[Re: NITROUSN]
#3134277
04/01/23 08:24 PM
04/01/23 08:24 PM
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Joined: Jan 2003
Posts: 7,861
Witness Protection Program
Kudakidd
OP
master
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OP
master
Joined: Jan 2003
Posts: 7,861
Witness Protection Program
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what kind of distributor?
what cams do you have on the accelerator pump on the holley?
had one that had some weird vacuum leak in the vacuum advance pot and would cause the car to pop and sputter under hard acceleration. unplugged the advance and it fixed it. The pink cams. And what the hell is this talk about burned valves and flat cam lobes. You guys are overthinking this. It's a baffling problem, but I'm sure it's a simple fix. I'm surprised no one suggested rebuilding the engine! Well if it was that simple you should of had it fixed by now. You have been trying to fix it for months. Time to get it in the hands of someone smart enough to diagnose and fix it. Ouch! Well that ain't gonna help.
Last edited by Kudakidd; 04/01/23 08:34 PM.
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Re: Yeah, It's Me Again
[Re: Andrewh]
#3134358
04/02/23 08:46 AM
04/02/23 08:46 AM
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Joined: Jan 2003
Posts: 7,861
Witness Protection Program
Kudakidd
OP
master
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OP
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Joined: Jan 2003
Posts: 7,861
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you still didn't say what distributor you are using.
also apparently there is a higher cam than pink now according to holley's site. The distributor is a stock 1970 model w/ points and condenser.
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Re: Yeah, It's Me Again
[Re: Kudakidd]
#3134366
04/02/23 09:23 AM
04/02/23 09:23 AM
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Joined: Jun 2014
Posts: 3,210
Md.
carnut68
master
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master
Joined: Jun 2014
Posts: 3,210
Md.
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Still going through the teething pains. The stock 440 in my car still hesitates,back fires and stumbles under hard acceleration. Other than that annoying and aggravating trait, it starts right up, idles forever and runs smoothly under partial acceleration. It is a four gear car, btw. What I've done so far: Replaced the fuel pump, adjusted the BRAND NEW Holley's float bowl levels, tuned up the idle mixture screws, replaced the coil, replaced the condenser, spark plugs and ballast resistor. HELP ME. I have rusty razor blades near my wrists. Does it stumble then clean up at WOT? What's the initial timing? How much advance? Have you inspected the rocker arms for excessive play? Did any of the plugs look much worse than the others? Distributor cap cracked? Bad plug wire/wires?
America First!
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Re: Yeah, It's Me Again
[Re: carnut68]
#3134374
04/02/23 09:37 AM
04/02/23 09:37 AM
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Joined: May 2005
Posts: 1,996
Apollo, PA.
B1MAXX
top fuel
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top fuel
Joined: May 2005
Posts: 1,996
Apollo, PA.
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Burn't or mis adjusted points (or something with them) would be my guess.
Last edited by B1MAXX; 04/02/23 09:39 AM.
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