Is there any specifications for vacuum readings for the 258 engine. To look
for vacuum leaks can you just check the general vacuum readings and if they
are not right then look for problems? I have an 85 cj-7 which runs rough and
stalls. All new ignition components, fuel filter, idle tubes are clean so I
am thinking vacuum leak somewhere.

 

mark did pass the time by typing:
> Is there any specifications for vacuum readings for the 258 engine. To look
> for vacuum leaks can you just check the general vacuum readings and if they
> are not right then look for problems? I have an 85 cj-7 which runs rough and
> stalls. All new ignition components, fuel filter, idle tubes are clean so I
> am thinking vacuum leak somewhere.

Not that I'm aware of. Just how-to's.

Best thing to do is grab a can of carb cleaner and start spraying the hoses.
if the engine stammers you found the leak. Pay close attention to the flexi
rubber joints, they go hard and crack..

The other method is to take the sytem apart and test each bit with a vac tester
like this one http://www.prismenterprise.com/mityvacauto/kits.html



--
DougW

 

mark did pass the time by typing:
> Is there any specifications for vacuum readings for the 258 engine. To look
> for vacuum leaks can you just check the general vacuum readings and if they
> are not right then look for problems? I have an 85 cj-7 which runs rough and
> stalls. All new ignition components, fuel filter, idle tubes are clean so I
> am thinking vacuum leak somewhere.

Not that I'm aware of. Just how-to's.

Best thing to do is grab a can of carb cleaner and start spraying the hoses.
if the engine stammers you found the leak. Pay close attention to the flexi
rubber joints, they go hard and crack..

The other method is to take the sytem apart and test each bit with a vac tester
like this one http://www.prismenterprise.com/mityvacauto/kits.html



--
DougW

 

mark did pass the time by typing:
> Is there any specifications for vacuum readings for the 258 engine. To look
> for vacuum leaks can you just check the general vacuum readings and if they
> are not right then look for problems? I have an 85 cj-7 which runs rough and
> stalls. All new ignition components, fuel filter, idle tubes are clean so I
> am thinking vacuum leak somewhere.

Not that I'm aware of. Just how-to's.

Best thing to do is grab a can of carb cleaner and start spraying the hoses.
if the engine stammers you found the leak. Pay close attention to the flexi
rubber joints, they go hard and crack..

The other method is to take the sytem apart and test each bit with a vac tester
like this one http://www.prismenterprise.com/mityvacauto/kits.html



--
DougW

 

Just that the more tuned the engine is, the higher in the inches of
mercury will be within the suggested color codes:
http://www.----------.com/vacuumgauge.jpg If the needle is bouncing
indicates a problem with burnt/sticking valve, gasket or rings.
God Bless America, Bill O|||||||O
mailto:--------------------

mark wrote:
>
> Is there any specifications for vacuum readings for the 258 engine. To look
> for vacuum leaks can you just check the general vacuum readings and if they
> are not right then look for problems? I have an 85 cj-7 which runs rough and
> stalls. All new ignition components, fuel filter, idle tubes are clean so I
> am thinking vacuum leak somewhere.

 

Just that the more tuned the engine is, the higher in the inches of
mercury will be within the suggested color codes:
http://www.----------.com/vacuumgauge.jpg If the needle is bouncing
indicates a problem with burnt/sticking valve, gasket or rings.
God Bless America, Bill O|||||||O
mailto:--------------------

mark wrote:
>
> Is there any specifications for vacuum readings for the 258 engine. To look
> for vacuum leaks can you just check the general vacuum readings and if they
> are not right then look for problems? I have an 85 cj-7 which runs rough and
> stalls. All new ignition components, fuel filter, idle tubes are clean so I
> am thinking vacuum leak somewhere.

 

Just that the more tuned the engine is, the higher in the inches of
mercury will be within the suggested color codes:
http://www.----------.com/vacuumgauge.jpg If the needle is bouncing
indicates a problem with burnt/sticking valve, gasket or rings.
God Bless America, Bill O|||||||O
mailto:--------------------

mark wrote:
>
> Is there any specifications for vacuum readings for the 258 engine. To look
> for vacuum leaks can you just check the general vacuum readings and if they
> are not right then look for problems? I have an 85 cj-7 which runs rough and
> stalls. All new ignition components, fuel filter, idle tubes are clean so I
> am thinking vacuum leak somewhere.