Hey, Im thinking its my cold start injector?
but before i tear anything apart, maybe someone knows whats up

I have dual exhaust no cats, and right when i start i get a nice "rich" puff of smoke, im certain its gas, but why, i dont know.
Any ideas?

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1985 IROC-Z, nuff said :P

 

What color is the smoke? If it is black that normally means that you are running rich. If it is white, and goes away then that is normal.

 

It's very black

carbon

So is that the cold start injector? or is something hosed?

[This message has been edited by IROC-Z_85 (edited June 25, 2001).]

 

It might be leaky injectors, they could cause that. Run some Fuel System cleaner when you fill your tank for a few tank fulls, see if it goes away.
It may or may NOT work, it depends on how they are leaking. If they are leaking from wear, then you might be sunk, But if you have some enamal buildup or something causing the injector from not closing all the way then it might clear it up.

Just a thought

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87 Formula Yellow/Black
Engine & Transmission
.040 over 5.0 converted to TPI, 9.5:1 Compression, SLP Cam Dur 206/212, Lift 480/487, Cent Line 112, SLP headers, SLP cat-back exhaust, K&N Airfilter, Modified Stock cold air intake, Ported & polished Stock TPI intake, Holley Adjustable Fuel Press regulator, AC Rapidfire Spark Plugs.
Gil Younger (no yo-yo) Shift Kit, Aluminum Driveshaft, 3.73 Posi gear
Suspension & Brakes:
Baer 12" brakes 4 wheels, KYB AGX Adjustable Shocks & struts, Hotchkis strut tower brace, South side machine frame connectors, Custom reinforced control arms and pan hard bar.
Interior:
Custom Leather interior, CUSTOM Yellow Gauge Faces, Kenwood Receiver, Pioneer Speakers, Kicker Substations, Kenwood 10 Disk Changer, Pioneer Amp.

87 Formula TPI (5 Speed) Yellow/Gray STOCK

1967 Buick Riviera 430hp Turns high 14's (Not bad for 4300 lbs)

83 Camaro (Parts)
83 T/A (parts)

http://www.3rdgenformula.com

 

Before you go replacing parts, run a scan with a quality scanner that reads sensor values. If the Coolant Temp Sensor is bad, the car will run rich when cold.

Why spend hundreds of dollars when a $6 part could be the culprit?

Good luck.



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Mike L.

"If it feels good - stay in it "

1987 IROC Z TPI 350 A4 3.27 Borg-Warner.

Mods: 2300-2500 Stall Converter, Shift Kit(GM parts), TPI Specialties Stage 3 PROM, Modified Airbox w/ K&N's, homemade cold air, Relocated MAT sensor, Gutted MAF, 160* thermostat, Accel 8mm Wires, bypassed TB coolant, Flowmaster 3 chamber single 3" in/out muffler, 3" MAC mandrel intermediate, custom dual !cat Y-pipe. airfoil, ported plenum. !smog

http://www.MichaelLasiuta.home.att.net

**BOYCOTT LAPEER DRAGWAY**

 

Well It doesn't happen for more than 3-5 seconds, I mean RIGHT when it starts up i can see in my mirrors the black smoke, but its gone as soon as it comes up to idle. Its been going on for a while, so I dont really want to spend ANY money

I figure it can live or it will be simple to fix. Thanks

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1985 IROC-Z, nuff said :P