Those of you with AFPRs
- Thread starter Justin
- Start date
Always hook it up to a fresh source. You want uninterrupted manifold vacuum/boost.
DO NOT hook it up via a VSV.
DO NOT hook it up via a VSV.
miggles said:
No, the factory source has a VSV inline to do something with fuel pressure when the engine is hot or something... not 100% sure what it does
It cuts off manifold vacuum and vents the FPR to atmosphere for about 90 seconds after a hot start. The ecu uses the coolant temp sensor to decide when to do it. This raises the fuel pressure to supress vapor formation and assist in hot starting. Unless you're boosting within 90 seconds of starting it's not an issue. Hook it to a full time vac sorce if you want but you may experience cranky hot starts.
jetjock said:
I agree with you jetlock, but to my suprise - after installing my afpr I no longer have hot start problems.
I still have mym afpr hooked up to the factory vacuum source... and i notice sometimes with hot starts, it'll idle like crap, at 500rpm or a little less.... is that related?
my fpr vsv broke and i never replaced it, under hot start conditions i have to hold the gas pedal down until everything evens out. ill be putting it back next time around.
[singing] my fresh vaccuum brings all the boys to the yard, my fresh vaccuum is better than yours...
[/singing]
to be constructive: lagged, i don't have that problem, but i read about people having it, so it's still there, just disconnected should the problem arise.
-shaeff
[/singing]
to be constructive: lagged, i don't have that problem, but i read about people having it, so it's still there, just disconnected should the problem arise.
-shaeff