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Bad hesitation after 3K RPM! HELP!!
#1086758
10/02/11 12:40 PM
10/02/11 12:40 PM
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Joined: Jul 2005
Posts: 1,499
Slidell, LA
Plum440
OP
pro stock
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OP
pro stock
Joined: Jul 2005
Posts: 1,499
Slidell, LA
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440 with complete rebuild - everything new. I just replaced the fuel lines and installed a new fuel pump. The car drives great until you hit 3k rpm. It bogs down but it doesn't appear fuel related. The rpm doesn't fall and when going to N it idles perfect. You can't get it to perform or do anything past 3k rpm. Feels like fouled plugs. The fuel lines and pump were replaced due to corrosion in original fuel lines. Thanks! 
70 Challenger, 440, 4-speed, pLuM cRaZy
71 VW Super Beetle Convertible, Lemon Yellow
A couple of Jeeps…
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Re: Bad hesitation after 3K RPM! HELP!!
[Re: Pacnorthcuda]
#1086760
10/02/11 01:21 PM
10/02/11 01:21 PM
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Joined: Jan 2005
Posts: 3,344
Central TX
roe
master
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master
Joined: Jan 2005
Posts: 3,344
Central TX
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Does it do it when you rev it in N?
1971 Plymouth Satellite
408/904 8 3/4 3.23 SG
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Re: Bad hesitation after 3K RPM! HELP!!
[Re: Pacnorthcuda]
#1086761
10/02/11 01:22 PM
10/02/11 01:22 PM
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Joined: Jul 2005
Posts: 1,499
Slidell, LA
Plum440
OP
pro stock
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OP
pro stock
Joined: Jul 2005
Posts: 1,499
Slidell, LA
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I replaced the fuel pump, filter and lines after the car died out on me and I had to floor the car to get it home, not exceeding 20 mph. The lines were badly rusted and clogged the fuel filter. The pump was replaced after the lines and filter because I was barely getting any fuel to the carb. Before it did this the car ran great at all rpms.
Thanks!
70 Challenger, 440, 4-speed, pLuM cRaZy
71 VW Super Beetle Convertible, Lemon Yellow
A couple of Jeeps…
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Re: Bad hesitation after 3K RPM! HELP!!
[Re: Plum440]
#1086764
10/02/11 01:27 PM
10/02/11 01:27 PM
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Joined: Jan 2005
Posts: 3,344
Central TX
roe
master
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master
Joined: Jan 2005
Posts: 3,344
Central TX
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I had similar issues and the carb was all plugged up with crap that got past the filter. Have you taken a look at the carb yet.
1971 Plymouth Satellite
408/904 8 3/4 3.23 SG
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Re: Bad hesitation after 3K RPM! HELP!!
[Re: Plum440]
#1086765
10/02/11 01:30 PM
10/02/11 01:30 PM
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Joined: Nov 2007
Posts: 21,822
Kirkland, Washington
Pacnorthcuda
Too Many Posts
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Too Many Posts
Joined: Nov 2007
Posts: 21,822
Kirkland, Washington
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Quote:
I replaced the fuel pump, filter and lines after the car died out on me and I had to floor the car to get it home, not exceeding 20 mph. The lines were badly rusted and clogged the fuel filter. The pump was replaced after the lines and filter because I was barely getting any fuel to the carb. Before it did this the car ran great at all rpms.
Thanks!
Ok---great info. What pump did you put on it? And the post above about possible crap in the carb might well be the problem.
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Re: Bad hesitation after 3K RPM! HELP!!
[Re: Plum440]
#1086766
10/02/11 01:33 PM
10/02/11 01:33 PM
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Joined: Jul 2005
Posts: 1,499
Slidell, LA
Plum440
OP
pro stock
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OP
pro stock
Joined: Jul 2005
Posts: 1,499
Slidell, LA
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I also noticed that after everything was changed the car was hard to start and blew excess exhaust. This was after I let it idle 20 mins after the repairs. Idle is crisp and smooth.
Thanks!
70 Challenger, 440, 4-speed, pLuM cRaZy
71 VW Super Beetle Convertible, Lemon Yellow
A couple of Jeeps…
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Re: Bad hesitation after 3K RPM! HELP!!
[Re: Plum440]
#1086767
10/02/11 01:41 PM
10/02/11 01:41 PM
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Joined: Jul 2005
Posts: 1,499
Slidell, LA
Plum440
OP
pro stock
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OP
pro stock
Joined: Jul 2005
Posts: 1,499
Slidell, LA
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He carb is an Eddy 750 on dual plane.
The carb sounds like the culprit. I'll pull it and clean it real good. The night before it crapped I got on it on the way home from a car show. Tons of junk could be stuck in it.
I'll double-check the timing too.
Thanks for the help guys!
70 Challenger, 440, 4-speed, pLuM cRaZy
71 VW Super Beetle Convertible, Lemon Yellow
A couple of Jeeps…
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Re: Bad hesitation after 3K RPM! HELP!!
[Re: 451Mopar]
#1086771
10/02/11 11:13 PM
10/02/11 11:13 PM
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Joined: Jan 2003
Posts: 1,771
Jamestown, Indiana
James74
top fuel
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top fuel
Joined: Jan 2003
Posts: 1,771
Jamestown, Indiana
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Quote:
What about the pickup/sending unit, and sock filter in the tank?
You may want to monitor fuel pressure while under load.
haven't heard an answer to this yet...if the fuel lines were that bad, and its the original sending unit/ fuel tank, then you'd have all that crap in your new fuel lines as well....
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Re: Bad hesitation after 3K RPM! HELP!!
[Re: PHJ426]
#1086773
10/03/11 07:25 AM
10/03/11 07:25 AM
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Joined: Jul 2005
Posts: 1,499
Slidell, LA
Plum440
OP
pro stock
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OP
pro stock
Joined: Jul 2005
Posts: 1,499
Slidell, LA
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The fuel tank and sending unit are probably 6 or 7 years old so I've ruled those out. It has been running great until just recently discovering the clogged filter and rusty lines. Also, the fuel filter was installed AFTER the pump until I discovered the mistake 3 months ago.
I removed the carb last night and cleaned it real good with carb cleaner and compresses air. I'll drive it at lunch today and see how she does.
Thanks
70 Challenger, 440, 4-speed, pLuM cRaZy
71 VW Super Beetle Convertible, Lemon Yellow
A couple of Jeeps…
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Re: Bad hesitation after 3K RPM! HELP!!
[Re: Plum440]
#1086774
10/03/11 07:34 AM
10/03/11 07:34 AM
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Joined: Jan 2003
Posts: 27,728
places
79powerwagon
Too Many Posts
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Too Many Posts
Joined: Jan 2003
Posts: 27,728
places
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Quote:
He carb is an Eddy 750 on dual plane.
I found your problem! 
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Re: Bad hesitation after 3K RPM! HELP!!
[Re: Mr.Yuck]
#1086776
10/03/11 08:38 AM
10/03/11 08:38 AM
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Joined: Jul 2005
Posts: 1,499
Slidell, LA
Plum440
OP
pro stock
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OP
pro stock
Joined: Jul 2005
Posts: 1,499
Slidell, LA
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I did and the hose looks fairly new. I will check all connections again. Never thought of that - thanks!
70 Challenger, 440, 4-speed, pLuM cRaZy
71 VW Super Beetle Convertible, Lemon Yellow
A couple of Jeeps…
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