White smoke at stoplights?

[89MustangGX]

Hello,

I have noticed over the past couple weeks, when I sit at a stoplight and then start driving again I get some white smoke out of the exhaust for a second or two. Once in a while, it will smoke while I am stopped -- just sit there and smoke.

I have an Edge Insight, and all of my temps and readings look normal to me. No codes. No mileage change. Oil and Coolant still look good.

Truck has a 4" off-road exhaust on it and a SRL program on it, but have had those for quite a while.

No racing or anything recently that I would think would cause problems, nor does the truck seem to run poorly.

I was getting ready to flush the coolant and change to ELC w/ filter, as well as change the banjo bolts and fuel pressure spring, but have not done so yet.

I'm concerned because it didn't do this before, and I don't want to get into doing more work if something is wrong.

Any ideas what would be causing this? What should I look for? If it weren't for the smoke I wouldn't think it was a problem, truck is running as good as it ever has.

Thanks,

Adam

[FordWake]

Probably unspent fuel since your not loosing coolant smell it if it burns your eyes and nose its unspent fuel. Switch to stock tune see if it goes away.

[diablos30]

could be a weak ficm, or a bad injector

any codes?

[89MustangGX]

Originally Posted by diablos30

could be a weak ficm, or a bad injector

any codes?

No codes. FICM voltage reads 48v-48.5v through the Insight. How do I check for a bad injector?

Originally Posted by FordWake

Probably unspent fuel since your not loosing coolant smell it if it burns your eyes and nose its unspent fuel. Switch to stock tune see if it goes away.

Would it be fuel for white smoke? When I step on it I do get some black smoke...from the tune. It didn't start until recently, but I can switch tunes and see what happens.

Adam

[FordWake]

Unspent fuel will be white yes and smell and burn your eyes. Black smoke is just fuel that hasnt fully burnt (not enough air) its why it usually clears up once the turbo gets going. Switch the tune to stock and try it. You may have an injector sticking open.

[diablos30]

Originally Posted by 89MustangGX

No codes. FICM voltage reads 48v-48.5v through the Insight. How do I check for a bad injector?



Would it be fuel for white smoke? When I step on it I do get some black smoke...from the tune. It didn't start until recently, but I can switch tunes and see what happens.

Adam

get friendly with someone that has AE

[89MustangGX]

Thanks-- I'll change tunes and see if I notice a difference.

If it is an injector, is replacement the only option? I run good synthetic oil, and thought I was helping them. Would rather not have to replace anything...

Also, I get about 15mpg mixed driving, and haven't seen a change. If I have a sticky injector, could I possibly get better mileage after fixing it?

Adam

[Acidsniper]

As far as oil and coolant "looking good" are you losing any coolant level at all?

As you didn't mention anything about an EGR delete / bulletproof EGR I'm assuming you have the stock EGR setup? Pull the EGR, is it wet, show any fluid seepage, etc? You could be getting minute coolant blowby into your exhaust as well (which would not throw a code if it's minimal).

Do you only see the smoke when the engine is cold / hot / always / etc?

As far as your FICM readings, is that engine off key on, cranking and engine on volts all staying above 48v at all 3 intervals?

[FordWake]

If you have a sticky injector i would reccomend rev x oil additive first.

[89MustangGX]

Originally Posted by Acidsniper

As far as oil and coolant "looking good" are you losing any coolant level at all?

As you didn't mention anything about an EGR delete / bulletproof EGR I'm assuming you have the stock EGR setup? Pull the EGR, is it wet, show any fluid seepage, etc? You could be getting minute coolant blowby into your exhaust as well (which would not throw a code if it's minimal).

Do you only see the smoke when the engine is cold / hot / always / etc?

As far as your FICM readings, is that engine off key on, cranking and engine on volts all staying above 48v at all 3 intervals?

Coolant level looks like it hasn't moved to me. I looked inside the reservoir and it looked golden clear. It looked darker in the deeper part, but I think that was shadow, because I could clearly see the fluid was almost clear where I was looking.

No EGR changes except the programming turned it off. I have never pulled it before, can you help with a "how-to" and I will take a look and/or clean it? Or I suppose I can just search on here...

The smoke only seems to be when cold. By the time I get home, I look and see no smoke. When I leave in the morning it is too dark for me to see anything. It only seems to happen when I leave from a stop, so I can't get out and smell it or see much other than in my side mirror.

The 48v was when engine running, I will check others when I go out in a bit to change the programming.

Adam