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White smoke from TBI?

Old 03-05-2019, 08:05 PM
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Car: 1992 Camaro RS
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White smoke from TBI?

Hey TGO,

I tried starting my parts car w/ potential and she ran REALLY REALLY rough. As I backed it in the driveway it cutoff like someone pulled the plug. I jump started it again, it ran like crap again for about 45 sec or so and I happened to notice some white smoke came up from the TBI, almost like an thin mushroom cloud as it died. I know the car has sat un-started for some time but when checking the Oil it didn't look like sludge or milky. When checking coolant it was as green as any other 50/50 coolant, When the weather breaks i'm going to pull plugs, check wires, cap & rotor button, etc but in the mean time I was looking for any of your experiences starting cars that have sat 6mo +

Now that I typed this up, it's almost like the plugs aren't burning off the fuel being supplied...

Any direction or input would be appreciated, Thanks.
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Old 03-06-2019, 01:45 PM
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Join Date: May 2015
Location: Ohio
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Car: 1992 Camaro RS
Engine: L03 305 V8
Transmission: 700-R4
Axle/Gears: RPO GU2 - 2.73
Re: White smoke from TBI?

Although it's still freezing out here in ohio, I did do another quick once over and realized the following was disconnected...

- Vacuum Line to Coolant Bypass Valve
- IAT Sensor

Reconnected IAT Sensor & Vac Line & Changed the Blown 20A ECM/FP Fuse. Battery is indoors on charge, will report back when it's above 40 degrees.
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Old 03-06-2019, 07:02 PM
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Join Date: May 2015
Location: Ohio
Posts: 205
Car: 1992 Camaro RS
Engine: L03 305 V8
Transmission: 700-R4
Axle/Gears: RPO GU2 - 2.73
Re: White smoke from TBI?

Update: Matter Resolved

Couldn't wait until a 40+ degree day so a bit ago I grabbed the battery off the charger and hooked it up. Tried to start, 1st two times were rough but it started, ran a bit smoother and NO MORE White smoke from the TBI. I now conclude the disconnected Vac line and IAT being disconnected & overlooked on my part was causing a quite critical rich condition, etc, etc.
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Old 03-11-2019, 11:05 AM
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Re: White smoke from TBI?

Could be bad gas too. It really doesn't have a long shelf-life.
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