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#1 | |
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Good luck Eric
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Eric Merryfield 1883 STK |
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Foot braking would isolate that circuit. Good idea. Thanks, Ed
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Ed Wright 4156 SS/JA Last edited by Ed Wright; 04-04-2011 at 10:23 PM. |
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Ed,
Could the 3 step be faulty and sending a charge back to the T-brake?
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Adger Smith (Former SS) |
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Ed, is this thing a speed density set up, or does it have a MAF sensor?
What are you using for a distributor? I want to go back over some of this, and see what you've replaced, or bypassed. MSD box? Coil? Batteries? Crank trigger pick up? Coil wire? ECU? Transbrake switch? Master switch Ignition switch? Transbrake solenoid? Starter solenoid? Battery cables? Anything else? Have you tried looking over all of the wiring, and using wire ties or "strain relief" to keep the wires from moving anywhere? Have you tried tapping sharply on your electrical devices? I'm sure you're familiar with the old "tap test" that we all used to use checking things like the MAF years ago. Also, what was changed, or what happened, immediately prior to this problem rearing its ugly little head?
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Alan Roehrich 212A G/S |
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Adger has a good thought, are you using a two or three step and if so at what RPM are the "pills"? Is one of them the same as the RPM engines dropping back to? Though I've never tried it I'd suspect even a small amount of voltage say 8-9 volts at the rev. limiter may be enough to activate it, where it would reqire full voltage to activate the trans brake. Joe
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Joe Buchanan SS/BX 3117 |
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I use the 7AL2Plus boxes. Heard too many stories about the 7AL3 stuff. I use the rotory 2 step RPM selector, but did plug a regular chip in it's place Friday. thought I had it one pass, then it did it again. It is speed density. I have tapped on everything, flexed and tugged on wires. Only thing I have not yet tested, but it's next, is the master battery cut-off. I have banged on it, and jerked on the battery cables trying to make it cut off, mis-fire, something. Right now both battery cables are on the same post. Guess I'll find out this weekend. Wanted to rent the track, but they are working on it this week. Water problem near the finish line. Been so dry here, I can't imagine where it's coming from.
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Ed Wright 4156 SS/JA |
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Any issues with fuel pressure? Though I'm sure you've looked it's not fluctuating is it? Joe
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Joe Buchanan SS/BX 3117 |
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Very valid point about the fuel issues. At the Topeka National a couple years ago, my car would fall on its face after letting go of the tranny brake. Changed carbs, spacers, richened, leaned, etc and nothing worked. Then we looked at the fuel pump pressure from the pump to the regulator and it was way down from the original setting. Changed it and increased the fuel pressure from the regulator to the carb and it all went away. Turns out (according to Barry Grant) the regulator and pump were taking a nose dive. Ended up getting them repaired and sold all of them for Magnafuel. Best switch I have made so far.
Might be worth looking into. I believe we set the fuel pump to regulator at 28 pounds. Was at 15 when we were having problems. |
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