OK, heres what you gotta do. Theres the clip on the alternator that has three wires. A red wire a brown wire and another brown wire with a white stripe. The red is the power. The two brown wires are what tells your alternator what kind of charge to put out. One is normal load and the other is for heavy load.

From what you'r saying, one of those wires isn't getting power to it. Grab a test light and poke the two brown wires while you have all the accesories on. I'm pretty sure that one of those wires won't have power to it. Then just follow the wire without power checking every 6-12 inches down the wire.

I had a similar problem with mine and it ended up being a bad connection in the main wire harness that plugs into hte firewall.

Good luck! Let us know if it works or not!

-Ken

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1987 Red IROC-Z / 305 TPI / TH700R4
Smoke Show Video's
British Columbia - Team F-Body
Pictures...

Edlebrock headers / Bored out Catilitic converter / Flowmaster muffler / 3" exhaust cut out / MSD 6AL Ignition / Hypertech performance chip / 160 Thermostat / Hypertec pulleys / Posi 3.73's / Shift kit (?) / TC Lock-up switch / Dual K&N's

201 rwhp 285 trq.
best time 14.687 @ 93 mph

In the making...
383 forged L98 / Miniram II intake / AFR 190cc heads / Costum grind cam / BBK 58mm TB / Costum tuned chip (4now!)/ 200 shot of NOS to be added later

Expecting ~400rwhp N/A

 

k. my car runs like ***.. im not worried about the electrical problem anymore. well i am but, i want it to run right first.
started my car yesterday right. ran perfect . so i decided to take it out for a little ride. sure enough, when i was at a light on transit rd, it started going crazy. wouldnt idle for crap. then when i tried to go, the thing did nothing but pop, spuder, and go know wheres at all.!. but then on my street it ran perfect again!> whats going on!. im getting two codes, 23 mat sensor.
and 44 lean exaust. i replace the O2 sensor in hopes of fixing it, nope, still does the same thing. any more ideas>?
later
shaun

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1987 IROC-Z
355ci, Dart 2.02x1.60, compete forged bottom end, SLP siamesed runners, fully ported Edelbrock manifold and plenum, 58mm TB, Accel 26lb Injectors, Edelbrock headers & y-pipe, Flowmaster 3" cat-back, Rebuilt 700r4, B&M Megashifter, Holley 255lph fuel pump, triple guage pod, !A/C & Heat, !Smog pump, bypassed TB, MJS Ram air, custom PROM, Lakewood control lower control arms, Lakewood adjustable pan hard, Sub-Frames, Hotchkis Strut tower brace, Adjustable Torque Arm, 150hp NOS
IROC Pix

 

Did you reset the ecm? The computer needs to relearn the O2 readings. TRy changing the fuel filters too.

 

ok, i decided to take my car out for a ride.
so i went out riding like around the block and stuff. well the car ran perfect!. but as b4, when i hit the fans, or headlights, the thing just dies!. and i tried a new alternator, a friends alternator. and it doesnt seem to make the slightest difference.
any other ideas? battery? all connections are tight. all new wires, etc.

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1987 IROC-Z
355ci, Dart 2.02x1.60, compete forged bottom end, SLP siamesed runners, fully ported Edelbrock manifold and plenum, 58mm TB, Accel 26lb Injectors, Edelbrock headers & y-pipe, Flowmaster 3" cat-back, Rebuilt 700r4, B&M Megashifter, Holley 255lph fuel pump, triple guage pod, !A/C & Heat, !Smog pump, bypassed TB, MJS Ram air, custom PROM, Lakewood control lower control arms, Lakewood adjustable pan hard, Sub-Frames, Hotchkis Strut tower brace, Adjustable Torque Arm, 150hp NOS
IROC Pix

 

alright i had enough im buying a carb.
anyone interested in a aftermarket top end?
edelbrock base(ported), slp siamesed runners(ported). and ported to match the runners plenum..

 

Doin' a carb lol YEr as bad as me...you will LOVE the enhanced top end however that comes with a decent intake and carb!! later man and goodluck. I suggest a typical Holley 750 if you have a 350 engine or just a 600 Holley for a 305 engine. My 600 was perfect right out of the box, all that needed to be done was an idle adjustment to get it down to 600 instead of 750...later man!

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Denny Villemure
1989 Camaro IROC-Z Convertible, 305 TPI, 2.73 Gear, Flowmaster 2 chamber. 15.60 on motor, 14.20 on a 75 shot from NX. Woo hoo!
www.denny.cz28.com

 

no , i cant do that, not this year anyways.
but i really need help still,. anyone else any suggestions?

 

ok, i still have the same problem. any body know a good place to take it to get it worked on!

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1987 IROC-Z
355ci, Dart 2.02x1.60, compete forged bottom end, SLP siamesed runners, fully ported Edelbrock manifold and plenum, 58mm TB, Accel 26lb Injectors, Edelbrock headers & y-pipe, Flowmaster 3" cat-back, Rebuilt 700r4, B&M Megashifter, Holley 255lph fuel pump, triple guage pod, !A/C & Heat, !Smog pump, bypassed TB, MJS Ram air, custom PROM, Lakewood control lower control arms, Lakewood adjustable pan hard, Sub-Frames, Hotchkis Strut tower brace, Adjustable Torque Arm, 150hp NOS
IROC Pix