Black smoke at startup
 

My 88 Jeep Wrangler sometimes blows black smoke when started. The
smoke leaves a wet mark on the driveway that looks like someone took a
spray can and lightly sprayed the area under the tailpipe. The smoke
usually disipates rather qickly. From what I have researched, it is
the fuel running too rich. Does this sound right on? Also, my gas
mileage in the jeep is not the greatest (to be expected). Could the
mixture have an adverse effect on the mpg as well?

As always, thanks to this group for the help....

Re: Black smoke at startup
 

Someone has replaced your engine with a diesel!

Carburated or F.I.? How cold is it in the morning?
--
Stupendous Man,
Defender of Freedom, Advocate of Liberty

Re: Black smoke at startup
 

Someone has replaced your engine with a diesel!

Carburated or F.I.? How cold is it in the morning?
--
Stupendous Man,
Defender of Freedom, Advocate of Liberty

Re: Black smoke at startup
 

Someone has replaced your engine with a diesel!

Carburated or F.I.? How cold is it in the morning?
--
Stupendous Man,
Defender of Freedom, Advocate of Liberty

Re: Black smoke at startup
 

wbowlin did pass the time by typing:
> My 88 Jeep Wrangler sometimes blows black smoke when started. The
> smoke leaves a wet mark on the driveway that looks like someone took a
> spray can and lightly sprayed the area under the tailpipe. The smoke
> usually disipates rather qickly. From what I have researched, it is
> the fuel running too rich. Does this sound right on? Also, my gas
> mileage in the jeep is not the greatest (to be expected). Could the
> mixture have an adverse effect on the mpg as well?

If it didn't dissapate I'd think you had leaky valve seats and
some oil was getting into the pistons. A vac gauge will tell you
that. http://www.theautoist.com/vacuum_guage.htm
with pictures http://marinemechanic.com/site/page26.html
color pictures http://www.classictruckshop.com/club...ts/vac/uum.htm

As old as your Jeep is, it could just be condensation in the
exhaust system and leftover carbon getting blown out as the
engine starts. Normally if there is an oil leak you get a nice
blue/black cloud that follows you around.


--
-- DougW -- 93 ZJ 4.0 http://revbeergoggles.com
HESCO Supercharger - 300W IASCA Stereo - Edelbrock IAS Shocks
Gibson Exhaust - rear DCpower - custom gauge install - Stillen Rotors
Banks Header - and BEER, in the fridge!

Re: Black smoke at startup
 

wbowlin did pass the time by typing:
> My 88 Jeep Wrangler sometimes blows black smoke when started. The
> smoke leaves a wet mark on the driveway that looks like someone took a
> spray can and lightly sprayed the area under the tailpipe. The smoke
> usually disipates rather qickly. From what I have researched, it is
> the fuel running too rich. Does this sound right on? Also, my gas
> mileage in the jeep is not the greatest (to be expected). Could the
> mixture have an adverse effect on the mpg as well?

If it didn't dissapate I'd think you had leaky valve seats and
some oil was getting into the pistons. A vac gauge will tell you
that. http://www.theautoist.com/vacuum_guage.htm
with pictures http://marinemechanic.com/site/page26.html
color pictures http://www.classictruckshop.com/club...ts/vac/uum.htm

As old as your Jeep is, it could just be condensation in the
exhaust system and leftover carbon getting blown out as the
engine starts. Normally if there is an oil leak you get a nice
blue/black cloud that follows you around.


--
-- DougW -- 93 ZJ 4.0 http://revbeergoggles.com
HESCO Supercharger - 300W IASCA Stereo - Edelbrock IAS Shocks
Gibson Exhaust - rear DCpower - custom gauge install - Stillen Rotors
Banks Header - and BEER, in the fridge!

Re: Black smoke at startup
 

wbowlin did pass the time by typing:
> My 88 Jeep Wrangler sometimes blows black smoke when started. The
> smoke leaves a wet mark on the driveway that looks like someone took a
> spray can and lightly sprayed the area under the tailpipe. The smoke
> usually disipates rather qickly. From what I have researched, it is
> the fuel running too rich. Does this sound right on? Also, my gas
> mileage in the jeep is not the greatest (to be expected). Could the
> mixture have an adverse effect on the mpg as well?

If it didn't dissapate I'd think you had leaky valve seats and
some oil was getting into the pistons. A vac gauge will tell you
that. http://www.theautoist.com/vacuum_guage.htm
with pictures http://marinemechanic.com/site/page26.html
color pictures http://www.classictruckshop.com/club...ts/vac/uum.htm

As old as your Jeep is, it could just be condensation in the
exhaust system and leftover carbon getting blown out as the
engine starts. Normally if there is an oil leak you get a nice
blue/black cloud that follows you around.


--
-- DougW -- 93 ZJ 4.0 http://revbeergoggles.com
HESCO Supercharger - 300W IASCA Stereo - Edelbrock IAS Shocks
Gibson Exhaust - rear DCpower - custom gauge install - Stillen Rotors
Banks Header - and BEER, in the fridge!

Re: Black smoke at startup
 

wbowlin@gmail.com wrote:
> My 88 Jeep Wrangler sometimes blows black smoke when started. The
> smoke leaves a wet mark on the driveway that looks like someone took a
> spray can and lightly sprayed the area under the tailpipe. The smoke
> usually disipates rather qickly. From what I have researched, it is
> the fuel running too rich. Does this sound right on? Also, my gas
> mileage in the jeep is not the greatest (to be expected). Could the
> mixture have an adverse effect on the mpg as well?
>
> As always, thanks to this group for the help....
>

Do you still have the Carter and computer hooked up to it? It sounds
like a combination of water (condensation) and soot spitting out, and
the choke being on...

--
Simon
"I may be wrong, but I'm not uncertain." -- Robert A. Heinlein

Re: Black smoke at startup
 

wbowlin@gmail.com wrote:
> My 88 Jeep Wrangler sometimes blows black smoke when started. The
> smoke leaves a wet mark on the driveway that looks like someone took a
> spray can and lightly sprayed the area under the tailpipe. The smoke
> usually disipates rather qickly. From what I have researched, it is
> the fuel running too rich. Does this sound right on? Also, my gas
> mileage in the jeep is not the greatest (to be expected). Could the
> mixture have an adverse effect on the mpg as well?
>
> As always, thanks to this group for the help....
>

Do you still have the Carter and computer hooked up to it? It sounds
like a combination of water (condensation) and soot spitting out, and
the choke being on...

--
Simon
"I may be wrong, but I'm not uncertain." -- Robert A. Heinlein

Re: Black smoke at startup
 

wbowlin@gmail.com wrote:
> My 88 Jeep Wrangler sometimes blows black smoke when started. The
> smoke leaves a wet mark on the driveway that looks like someone took a
> spray can and lightly sprayed the area under the tailpipe. The smoke
> usually disipates rather qickly. From what I have researched, it is
> the fuel running too rich. Does this sound right on? Also, my gas
> mileage in the jeep is not the greatest (to be expected). Could the
> mixture have an adverse effect on the mpg as well?
>
> As always, thanks to this group for the help....
>

Do you still have the Carter and computer hooked up to it? It sounds
like a combination of water (condensation) and soot spitting out, and
the choke being on...

--
Simon
"I may be wrong, but I'm not uncertain." -- Robert A. Heinlein