Re: Breaking up around 4K
[Re: Alaskan_TA]
#2697577
09/14/19 07:32 PM
09/14/19 07:32 PM
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Joined: Nov 2003
Posts: 36,041 Lincoln Nebraska
RapidRobert
Circle Track
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Circle Track
Joined: Nov 2003
Posts: 36,041
Lincoln Nebraska
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MSD issue I am thinking, what specifically, not sure. I would check the dist for a start. EDIT on second thought check the plugs/plug wires.
Last edited by RapidRobert; 09/14/19 07:44 PM.
live every 24 hour block of time like it's your last day on earth
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Re: Breaking up around 4K
[Re: second 70]
#2698710
09/18/19 12:06 PM
09/18/19 12:06 PM
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Joined: Aug 2009
Posts: 1,318 Ohio
jlatessa
pro stock
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pro stock
Joined: Aug 2009
Posts: 1,318
Ohio
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Had a similar problem on a car a long time ago, after chasing my tail for a while I found the center Carbon contact, (this was the spring loaded one on a Prestolite cap) had disintegrated...problem solved.
An easy check, Joe
Last edited by jlatessa; 09/18/19 12:07 PM.
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Re: Breaking up around 4K
[Re: jlatessa]
#2698767
09/18/19 07:17 PM
09/18/19 07:17 PM
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Joined: Jan 2003
Posts: 10,738 North Dakota
6PakBee
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 10,738
North Dakota
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Just a curiosity question, does the problem change with load? 4K at standstill, at part throttle, at full throttle?
"We live in a time when intelligent people are being silenced so that stupid people won't be offended".
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Re: Breaking up around 4K
[Re: 6PakBee]
#2698812
09/18/19 10:53 PM
09/18/19 10:53 PM
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Joined: Aug 2012
Posts: 65 WV
WV Runner
OP
member
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OP
member
Joined: Aug 2012
Posts: 65
WV
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Just a curiosity question, does the problem change with load? 4K at standstill, at part throttle, at full throttle? At stand still nothing, part and full throttle it happens
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Re: Breaking up around 4K
[Re: WV Runner]
#2698941
09/19/19 11:27 AM
09/19/19 11:27 AM
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Joined: Jan 2003
Posts: 1,762 Windsor, ON, Canada
Diplomat360
top fuel
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top fuel
Joined: Jan 2003
Posts: 1,762
Windsor, ON, Canada
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Had something similar to this, the difference being that at about 5k the motor would just about nearly back down to idle RPM (this was at the track, so literally 2 secs after shifting to 2nd gear). As it turned out my fuel system was the problem, or specifically the filter I had placed in front of the Carter mechanical fuel pump.
It worked fine having been installed that way for about 3 seasons, this was NOT the correct installation though. The minute I removed that filter I had my fuel pressure back up and no issues.
I suspect that in my case maybe the pump diaphram just wore down enough that it could no longer overcome the pressure obstruction in the line which the filter element presented.
Anyways, it was weird, work the day before just fine, then all of a sudden it "gave up the ghost"...LOL!
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Re: Breaking up around 4K
[Re: Diplomat360]
#2699173
09/20/19 10:19 AM
09/20/19 10:19 AM
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Joined: Sep 2003
Posts: 19,492 north of coder
moparx
"Butt Crack Bob"
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"Butt Crack Bob"
Joined: Sep 2003
Posts: 19,492
north of coder
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years ago, i had a guy come around with a new ford pickup that had this issue, but this engine would only go to around 3500 or so. the problem turned out to be a plugged muffler. he had taken off the factory exhaust at the cat, then used a pipe to smash the guts out of the cat. then, he replaced the factory exhaust with a cat back system. well, it just so happened he only got the big pieces out of the cat. over time, the cat shed enough pieces that were not rodded out back to the cheap turbo muffler, causing it to plug up. the point being, [and you don't have a cat] could your muffler[s] be coming apart internally, and the baffles blocking the exhaust ? GM products were notorious [around here, anyway] for plugged cats causing the symptom you have. please let us know what the cause turns out to be.
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