93BlackFD

the check valve that comes from the y-pipe to the pressure tank near the cross over pipe, if it were not there....what would happen? i lost mine and i am running without one, wondering if it is the cause of my 7-5-5 pattern

Rated R1

Yes that is the cause. Replace that valve monkey!

93BlackFD

i hope the HELP! brand pepboys crap works for troubleshooting purposes

does mazdatrix sell these? i can't find a part number

dubulup

I have a few extra in my basement, I just might be willing to sell for a few bucks and shipping.

That line poped off before I bought the car and I couldn't get sec. boost in 1st gear, and hooked it back up and got full boost. Your vac. job looks good. I'll see if I can get some progress on mine uploaded. PM me about the CV

93BlackFD

well, i need more help, i bought a temporary fix for my check valve problem (a generic one from a local auto shop)

anyways, now if i put it on flowing torwards the y-pipe, (meaning it stores a vaccum in the pressure chamber...makes no sense) the car runs like crap and won't boost

if i put it the other way around, i get 7psi on primary, 7-8psi on transition and then 8psi on secondary until 5200rpms when i get 0psi and the car stutters and pops....

any suggestions?

Dougie_fresh_007

is the check valve going the right direction, what they do is they restrict the flow to one direction, flip the valve around and try again

93BlackFD

read the post i tried both, i'm satisfied with it the way i would suspect it to go....letting boost in the pressure tank but not vaccum