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81' Gen 1 Electrical/Ignition Problems

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Right after I got my '81 BRAT I went and did a tune up new plugs, good wires, new coil, and I got that ea81 runnin like a beast (despite the oil leak on the oil pump, and the one on the pan gasket, I think). I stopped by a buddies house later that day and when it was time to go, No start.....hmmm. After checking the carb for fuel I checked the spark....It was DEAD No voltage to the coil was the problem, so I hot-wired the car and made my way home. 4 months later, its still hotwired (with a relay and switch at least!). Everything in the dash works fine except the tach, its all jumpy and sometimes reads next to nothing, and it bounces when I use my blinker. I read somwhere in the USRM that a bouncy tach can be a sign of distributor failure. Was wondering about what my problem could be?

 

thanks, Kurt

Tach may be unrelated - check the shaft bushings in the disty for that.

 

As for the ignition power - what exactly did you hotwire? Did you wire power directly to the coil? Could be a relay..... you have checked the fuses right?

 

GD

If it's an 81 Brat, then you're correct that it's a 1st-gen, and 1st-gen questions are best answered in the Historic forum.

 

Ignition module maybe?

  • Author

Yeah I ran wire from the +post to the + on the coil, I checked the 8 glass fuses under the dash on the drivers side.

If it's an 81 Brat, then you're correct that it's a 1st-gen, and 1st-gen questions are best answered in the Historic forum.

 

Ignition module maybe?

 

Incorrect - the 81 GL Brat has the EA81 and the 4 speed D/R, so while it is indeed a Gen 1 body, it has a full Gen 2 drivetrain. So his question (which is electronic ignition engine related) is more applicable here where there are MANY more folks familar with his setup.

 

I would say (stab in the dark) either ignition relay, or the ignition switch itself.... but more likely to be a relay or something. If you have a wireing diagram have a look at the coil circuit and start traceing with your multi-meter.

 

GD

  • Author

If the module was bad wouldn't still not run after a hotwire?

Correct - if the module were bad, it would not run regardless of how it was wired.

 

Your problem is clearly in the power supply to the coil.

 

GD

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