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#4132896 - 01/14/22 08:36 AM Brief smoke while stopped
mkpctv Offline
Member

Registered: 04/06/17
Posts: 208
Loc: South FL
Hi again everyone, the issues keep coming one after another now.

I got the replacement ABS module installed and the dash lights went out, hoping that takes care of that issue, thanks again to everyone who helped me with that.

Recently I've been seeing a cloud of white smoke from the upper hood driver side area, I know what other burned fluids/plastic smells like but this seems to smell like brake fluid. Strange thing is, this only happens after the car has been sitting overnight and I've driven a couple miles afterwards. I'll be at a stop light on the way to work and see a cloud of white smoke, afterwards it wont do it again the rest of the day. I checked around under the hood, engine running, no burn marks anywhere, no visible leaks, not overheating. Right now I suspect an internal leak at the master cylinder or brake booster however there has been no drop in brake fluid level, or any fluid level for that matter. I'm aggravated and puzzled right now...
_________________________
2008 Mercury Grand Marquis GS - purchased Feb 2017 33k original miles

In the past:
2006 Chevrolet Cobalt
1998 Pontiac Grand Prix GTP
1988/1983 Chevrolet Caprice

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#4132902 - 01/14/22 09:28 AM Re: Brief smoke while stopped [Re: mkpctv]
SocalSam Online   content
Over the Hill

Registered: 03/30/13
Posts: 3156
Loc: SFV, Calif.
Brake fluid may be over filled if at Max at rest. Suck out a little fluid to see if that stops over flow.
_________________________
2004 CV LX Sport #2, 121,000 miles -- Current
2008 CVPI Arizona Beige, 121,000 miles, 677 idle hours -- Current
Option Adds: Message Center Instrument Cluster , Re-Key Locks , Passenger Door Lock , Autolamps , Ballistic Panels


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#4132924 - 01/14/22 02:05 PM Re: Brief smoke while stopped [Re: mkpctv]
mkpctv Offline
Member

Registered: 04/06/17
Posts: 208
Loc: South FL
Ok I will try that first. I'll feel around the lines for any signs of fluid seepage, maybe something is hitting the hot exhaust manifold sometimes as well, but I don't see loss of any fluids as of yet...
_________________________
2008 Mercury Grand Marquis GS - purchased Feb 2017 33k original miles

In the past:
2006 Chevrolet Cobalt
1998 Pontiac Grand Prix GTP
1988/1983 Chevrolet Caprice

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#4132974 - Yesterday at 07:06 AM Re: Brief smoke while stopped [Re: mkpctv]
ironmarinebill64 Offline
Rookie

Registered: 01/30/21
Posts: 95
Loc: New York, USA
You're from Florida, so this might not be the issue, but look at the steel brake lines where they come out of the master cylinder. If there's any corrosion, especially at the bends, a very small pin hole can develop where every time you press the brake, a little fluid can squirt or seep out.

I had an older full size jeep where that happened because of road salt induced corrosion. Similar symptom though: would come to a light, step on the brake and get a puff of white smoke.
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2005 Lincoln Town Car Signature Limited
5.4 liter throttle body; PI oil cooler, intake tube & air box; Mark VIII aluminum driveshaft; Trac-Lok limited slip; Richmond Gear axle shafts; J-Mod with Sonnax valves; Limo rear control arms and a great sounding stereo that won't ever automatically remember my Bluetooth settings

1999 Mercury Grand Marquis (gave that to youngest son, and he's now a converted true believer)

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#4132982 - Yesterday at 09:01 AM Re: Brief smoke while stopped [Re: ironmarinebill64]
mkpctv Offline
Member

Registered: 04/06/17
Posts: 208
Loc: South FL
Originally Posted By ironmarinebill64
You're from Florida, so this might not be the issue, but look at the steel brake lines where they come out of the master cylinder. If there's any corrosion, especially at the bends, a very small pin hole can develop where every time you press the brake, a little fluid can squirt or seep out.

I had an older full size jeep where that happened because of road salt induced corrosion. Similar symptom though: would come to a light, step on the brake and get a puff of white smoke.


I actually work on the beach so my car is subject to salty air conditions almost daily (i try my best to rinse the car often) so thats possible. I'm going to look at the lines more closely this weekend.
_________________________
2008 Mercury Grand Marquis GS - purchased Feb 2017 33k original miles

In the past:
2006 Chevrolet Cobalt
1998 Pontiac Grand Prix GTP
1988/1983 Chevrolet Caprice

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#4132984 - Yesterday at 10:42 AM Re: Brief smoke while stopped [Re: mkpctv]
Rootintootin Online   content
Climber

Registered: 02/26/08
Posts: 697
Loc: North Carolina
Originally Posted By mkpctv
....I'll be at a stop light on the way to work and see a cloud of white smoke....


You're in South FL. What says you can't make like you're 80 years old; stop when you see the smoke; and pop the hood for a look-see? You might actually see where it's coming from instead of trying to guess where it was later on.
_________________________
97 CVPI, 147K miles

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#4133018 - Yesterday at 06:14 PM Re: Brief smoke while stopped [Re: mkpctv]
mkpctv Offline
Member

Registered: 04/06/17
Posts: 208
Loc: South FL
Well I kind of did that today, I let the motor run for about 10 minutes then took a hose and let water trickle down the windshield and started to notice the same smoke happening a little bit. I opened up the long plastic piece that clips together where the water drains under and inside was packed full of leaves. After studying the windshield drain it looks like it flows into a gutter then goes down and terminates just above the first cat converter. Strange thing is The water drained fine even before I cleaned out all the leaves. Is the little gutter supposed to terminate right above the cat converter? You’d think water dripping onto that area would constantly cause steam/smoke.

I’m not convinced that was the cause of the smoke still, The smoke happens even on a dry morning and I even pumped the brake pedal and had it held down while I checked over everything no signs of any fluid leak or smoke otherwise still.
_________________________
2008 Mercury Grand Marquis GS - purchased Feb 2017 33k original miles

In the past:
2006 Chevrolet Cobalt
1998 Pontiac Grand Prix GTP
1988/1983 Chevrolet Caprice

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#4133020 - Yesterday at 06:47 PM Re: Brief smoke while stopped [Re: mkpctv]
Bellwestern80 Offline

CVN Discord: Edsel
Over the Hill

Registered: 07/01/11
Posts: 4120
Loc: Evans, Georgia
Valve covers aren't weeping/seeping down onto the exhaust manifolds, are they?
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My Cars:
-1964 Mercury Comet 202 (116K Miles | 170 I6) - Restoration Project
-1986 Dodge D-150 Royale SE (112K Miles | 360 V8) - Waiting on a TorqueFlite
-1987 Mercury Colony Park LS (330K Miles | H.O. 302) - March 2017, November 2019, & September 2021 POTM Winner
-1997 Mercury Grand Marquis LS (230K Miles | nPI 4.6) - The Daily Workhorse & April 2013 POTM Winner

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