I just purchased a 85 Z-28 305 carb car with only 26 K auto,yes it's actual miles black with pimp red interior. any way the car has sat for the last 3 years so I drained the gas put new in I would not start I noticed two plug wires were broken so I replaced them and took the cap off it was perfect inside rotor looked good also so It started after that and runs great on the road but it will not idel correctly I have gone throught 3 tanks of 93 so it's not fuel. It will idel at about 600 rpm for a few seconds then jump to about 1200 them back to 600 just back and forth real fast and it is super annoying also at low speed cruise you can feel it buck some;
Also the turn signal, when on the battey gauge jumps around stops when turn signal goes off (ground maybe) All help is great Thanks, Jason

 

If the car sat for 3 years,try new carb or rebuild old one,thats along time for something to sit and not be touched.Also check for brittle wires on the module and coil,they can be breaking down.

 

I will check all wires tonight and clean up contacts on all sensors

 

Also, replace all the vacuum line. It's really cheap, and can help your idle problem, which does indicate a vacuum leak.

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--Steve S--
1984 Trans Am 305 LG4, 5 speed Daily Driver, Flowmaster 80 Series
Holley 600 cfm & vacuum advance
Soon: Edlebrock Intake & TES

 

found it the gasket under the carb had dried up and cracked in several places I changed it and whala it's like new smooth idel at abou 650 rpm ahhhhh much better

 

About that turn signal thing - mine does that too. I have replaced all the starting/charging system components (for other reasons) and still does it. It also seems like the in dash voltage guage always reads lower than my handheld DVM. I think it's because the entire cluster runs off of the same supply line and the turn indicators use up just a little bit of voltage, enough to make the needle move. At least that's my working thoery. I am considering/ working on ways around this.

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1987 Camaro IROC-Z28
"Slower than a wal-mart cashier"
Ram-Air Intake/Modified air boxes & aftermarket MAF w/ K&N's
Hypertech Air foil
Hypertech 160* stat/TB coolant bypass
MSD 6A ignition & MSD SS coil
Crane AFPR
Accel 8.8MM 300+ Race wires
R134A A/C retrofit
Prof. built 355 TPI
Mobil 1 synth. fluids
New GM 700R4
Posi disc 9 bolt rear 3.23:1 (G80 & G92)
TCC lockup switch
T-tops/roof console/all power opts.
Engine oil cooler
Custom Flowmaster 3" exhaust with dual chrome tips
All new interior
Macewen White face gauges & hyper blue/white dash bulbs
ADS super chip - stage I
Dunlop SP sport 5000 P245/50 ZR/WR 16's

 

Yep they are all tied together...

http://www.geocities.com/vtcamaro/Pi...rams/pg175.jpg