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#41
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#42
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Following this thread with great interest as it is a real puzzle. But I wonder if this thread has a contagious virus as my fuel pump went out last night !!
Jim
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65 Catalina sedan. Allen Thomas Performance 495. KRE Heads at 310cfm ported by SD Performance, ProSystems Dominator carb on ported Victor intake, P-Dude custom grind hydraulic roller, MSD ignition, 3.50 Moser/Ford rear. F-Glass front bumper by son Rob, rear by the old man and joint effort for trunk lid. 3950# w/driver. Best of 9.5761/139 on 175 shot, 6.01 /114 in 1/8. |
#43
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I had it happen two years in a row up at Norwalk.
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#44
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Tomorrow, I run some safety wire through the main fuel line. Then fuel pressure gauge. Then time for a .357 |
#45
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If you take the tank down again check the sending unit tube for obstructions, too.
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[SIGPIC][/SIGPIC |
#46
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I toss out a couple other thoughts.
How is the advance in the distributor? What about extra air getting in the carb at wot? That would make it nose over or die as I call it. Let off the gas and it would catch back up. Might have a bit of tunnel vision and need to think outside for a minute. patrick
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#47
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Did that the last time we had the tank out. Clear.
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#48
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The major factor is that it was ok up to the moment of the 112 octane and very bad about 5 minutes after. |
#49
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This thread is keeping me up at night !! You've inspected, cleaned, repaired and/or replaced everything in the fuel delivery system. Except for the fuel pump cam eccentric but that wouldn't be related to the 112 fuel.
How is the gas tank vented ? Racking my brain to think of anything. Jim
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65 Catalina sedan. Allen Thomas Performance 495. KRE Heads at 310cfm ported by SD Performance, ProSystems Dominator carb on ported Victor intake, P-Dude custom grind hydraulic roller, MSD ignition, 3.50 Moser/Ford rear. F-Glass front bumper by son Rob, rear by the old man and joint effort for trunk lid. 3950# w/driver. Best of 9.5761/139 on 175 shot, 6.01 /114 in 1/8. |
#50
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#51
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I maintain that there's valuable information in a fuel gauge reading when the problem occurs...
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#52
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I agree. First I'm going to 'snake' the main fuel line to see if there's any blockages and if it's still doing it, which with my luck, it certainly will be, then upward and onward to other things. I think I'll video it and put it up on here in the next couple of hours.
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#53
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Anything is possible. How is the coil, wiring to the petronix? Did you try weaker springs on the advance? The internals of the distributor can wear out. like matt mentioned put a fuel pressure guage to confirm or deny it is a fuel pressure problem. patrick
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#54
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Good one on coil. That is possible. Bucking and what have you can occur with that. Easy to test.
1st rule of troubleshooting - always start with the easy stuff first.
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"If you do everything you'll win" -LBJ 13 Smiles per Gallon: 66 Bonneville wagon 66 Bonneville 2d HT - In perpetual progress |
#55
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I set the timing by ear (always have) and get it to the point of detonation and then back off just a bit. Tunnel vision is what concerns me and why I'm posting here. I feel that it is something simple and the tunnell vision is preventing me from finding it. I'm going out to the garage now to 'snake' the main fuel line. I had to coffee up with some 112 octane 'race' coffee before I started on the car :-) Fuel pressure guage is next. |
#56
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fuel lines are clear front to back. Still doing it though and badly so I recorded it
http://youtu.be/hGdTrldobqk |
#57
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Another idea: what is the voltage TO THE COIL PRIMARY during "the event"?
Rig up a voltmeter between the coil primary and ground with the display in the passenger compartment... most Fluke DMMs have adequate lead lengths. |
#58
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I recorded it and put it on youtube. It's sounded like this through three coils http://youtu.be/hGdTrldobqk It really does sound like its just running out of fuel. |
#59
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Ok, I just woke up from a nap and didn't read it correctly that you said TO the coil primary. And true, I need to find longer leads
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#60
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I think you eliminated fuel issues.. I think it's electrical. Maybe due to increased vibration from higher RPM. After starting the car, I'd run an alligator clip from Battery + to the coil +. See if it still does it. That would rule out coil primary issues.
Check your wire going to the distributor. Put a new set of points in it. MK |
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