help.. my vacuum meter no reading

[sam1741]

hi all....

i got this vacuum meter i not yet install...

just now i go pull out a tube (connected to the intake hose)
and connect to my vacuum...
no reading one.. (at engine idle)

what happened? i got engine problem?

later i connect the vacuum meter to a tube
and use my mouth to suck..
the meter do move...

btw.. the vacuum meter reading written inch /hg


so is it normal one?

 

[szekeiemme]

wrong hose?

 

[sam1741]

no la.. i think correct
if put finger cover the hose
can slightly feel the vacuum inside....


so what is the normal reading when idleing?

 

[Darth]

17-22 inch/hg for proper 'healthy' engine

 

[tykoh]

no la.. i think correct
if put finger cover the hose
can slightly feel the vacuum inside....


so what is the normal reading when idleing?

i think you are connecting to the wrong hose lah.... u should make
a T-joint at the hose from engine to throttle body... dont connect the
hose of engine to air filter box...
just some experience... :)

 

[darkbob]

may i ask u what engine u r using ? what car ?

maybe u tapped the wrong hose ?

 

[drexchan]

wrong hose.

You should tap from the PCV or FPR vacuum hose.

 

[jaywat]

If u r connecting the correct hose but no reading, means ur car got vacuum problem and cannot start already la. Make sure it's the correct hose first. what car?

 

[sam1741]

hi all...

my car is datsun 120y...

the place i connect.. is the 'box' right after the carburetor and before my air filter..
dono if is correct or not?

PCV cannot connect.. as mine is just a big pipe and lead to the ground.. ( the mech that transplant this datsun engine dun conenct PCV.. cause hose size not right, then i cant find any place also)

so.. is the place correct? or should i find other place?

 

[Maxx]

i think u connected it to the wrong vac. line. use or T vac. line that are source from intake manifold or after carb.

 

[darkbob]

sam,

hmm.. in this case...

try looking behind ur carburetor, is there a Vacuum Distributor... it looks something like a connecter which connects lots of VAcuum Hoses... TRy tapping it from there.. :D

Good Luck Trying....