Im hoping to track down my engine trouble tommorow by doing new plugs, vacuum lines, Cap, and knock sensor.

I already have most everything I need, except for replacement Vacuum lines and was hoping someone here could help me out by posting what size line I will need to replace all of the vacuum lines.

I have a JDM DE with No emissions shit whatsoever, so all I have to run vacuum to would be the FPR and IACV correct?

Also, what size line does the break booster use? Id like to replace it as well with a single shorter piece.

Thank you very much!

PMed you, dude....

I'll check it all out tomorrow.

make sure you use a check valve with the brake booster.

make sure you use a check valve with the brake booster.


Roger that.

I just want to rid myself of the hard oem for fitted lines and clean up my firewall a bit.

I assume the check valve should be as close to the booster as possible?

yea it seems to be the norm with OE vacuum lines. im not too familiar with how much vac pressure the booster creates, but i wonder if there is an issue with rubber hoses collapsing.