thats ok,, my page shows using plenum vacuum as , as (hand tool) vacuum pump. i can use that to test all points, end to end .
like one uses a battery to test electric parts.
the hole, is common practice on all carbs and TB, that hole allows them to do the drillings, then when done too cheap to use a welch plug to block the cross drill point. they use a gasket
take the top off most carbs and wow. all those tricks there, some with welsh plugs or lead shot, or gasket tricks
ported vacuum is tricky, take the very tricky way vacuum advance works on a carb sammy
there can be 2 vacuum ports. that stage from vacuum retard to advance.
in this case the , egr port is just a tiny hole in the , air cleaner side, (no vacuum , nearly)
the port is near the butterly. if you look close, or could be covered in carbon.
or plugged
what i do is blow in the hole. see where the air comes out, and do block with your finger that rear hole in the gasket flange or the cross drilling leaks, hiding the truth
usually there are 2 or 3 drillings, in this case the nibble needs no drilling its cast in place
then the rear drilling, then the cross drill to more the EGR precision, port. they cross and bingo, its formed.
i no longer have access to an xray machine, but this can help
that is the EVAP nipple it is a hard vacuum there, infact both are.
that is correct, not matter, as it plenum vacuum
for sure i check both nipples for hard vacuum, in 1min flat.
that plenum as it 19inches at idle., vacuum the egr pulls in 100% at 8" HG.
sure , i liked your idea of the 1993 test, (89 to 1993 to more accurate)
its cool its fast and gets answers fast , lots of elimination, remove in 1min.
but you will need to gun the throttle to get the MOD to go full on, not for the ported rule, bypassed 1993 test.
the mode open more, for huge #4 exhaust pulses....
the mod really is and ENGINE LOAD measuring device, today the ECU calculate this in math, making mods, silly .
it uses the exh bark intensity to open the EGR main, the correct amount
here is the official graph by suz.
![[Image: egr-gas-profile.JPG]](http://www.fixkick.com/sensors/egr-gas-profile.JPG)
some ported vacuums are a slot in the bore, at fly edge, like my goofy vw bug has.
if you think this port is ticky try my bug carb.
close in view....
![[Image: 721745.jpg]](http://www.no-agua.net/At_Wits_End/Carbs-Suck/carb-photo-pit/Bocar%2034P/images/721745.jpg)
or this great cut away showing all drillings,
very good.
http://i325.photobucket.com/albums/k378/...C_0590.jpg
btw, im not saying i know the ported path in this body, i never tried to trace it but could.
use blow air, and feel , or use colored water injected.
but if you find this lil nugget of truth, would love a photo. (ill put it on the page)
oops i think id did this in 2009
looking now, in old photos.
i found it but not the , index
ah here it is under bruce... photo #8 and index key below that.
http://www.fixkick.com/EGR-horror2.html
its HOLE #4 , and right where expected.
i did trace them, but long forgot, then bruces photos pop in to my head. bingo. the ported vacuum.
naturally hole 1 is not there in 1992 to 1995.4 , 1999.5 has mono port , 1
like one uses a battery to test electric parts.
the hole, is common practice on all carbs and TB, that hole allows them to do the drillings, then when done too cheap to use a welch plug to block the cross drill point. they use a gasket
take the top off most carbs and wow. all those tricks there, some with welsh plugs or lead shot, or gasket tricks
ported vacuum is tricky, take the very tricky way vacuum advance works on a carb sammy
there can be 2 vacuum ports. that stage from vacuum retard to advance.
in this case the , egr port is just a tiny hole in the , air cleaner side, (no vacuum , nearly)
the port is near the butterly. if you look close, or could be covered in carbon.
or plugged
what i do is blow in the hole. see where the air comes out, and do block with your finger that rear hole in the gasket flange or the cross drilling leaks, hiding the truth
usually there are 2 or 3 drillings, in this case the nibble needs no drilling its cast in place
then the rear drilling, then the cross drill to more the EGR precision, port. they cross and bingo, its formed.
i no longer have access to an xray machine, but this can help
that is the EVAP nipple it is a hard vacuum there, infact both are.
that is correct, not matter, as it plenum vacuum
for sure i check both nipples for hard vacuum, in 1min flat.
that plenum as it 19inches at idle., vacuum the egr pulls in 100% at 8" HG.
sure , i liked your idea of the 1993 test, (89 to 1993 to more accurate)
its cool its fast and gets answers fast , lots of elimination, remove in 1min.
but you will need to gun the throttle to get the MOD to go full on, not for the ported rule, bypassed 1993 test.
the mode open more, for huge #4 exhaust pulses....
the mod really is and ENGINE LOAD measuring device, today the ECU calculate this in math, making mods, silly .
it uses the exh bark intensity to open the EGR main, the correct amount
here is the official graph by suz.
some ported vacuums are a slot in the bore, at fly edge, like my goofy vw bug has.
if you think this port is ticky try my bug carb.
close in view....
or this great cut away showing all drillings,
very good.
http://i325.photobucket.com/albums/k378/...C_0590.jpg
btw, im not saying i know the ported path in this body, i never tried to trace it but could.
use blow air, and feel , or use colored water injected.
but if you find this lil nugget of truth, would love a photo. (ill put it on the page)
oops i think id did this in 2009
looking now, in old photos.
i found it but not the , index
ah here it is under bruce... photo #8 and index key below that.
http://www.fixkick.com/EGR-horror2.html
its HOLE #4 , and right where expected.
i did trace them, but long forgot, then bruces photos pop in to my head. bingo. the ported vacuum.
naturally hole 1 is not there in 1992 to 1995.4 , 1999.5 has mono port , 1
http://www.fixkick.com