interesting post about s5 TII FPR solenoid...
Thread Starter
Joined: Jul 2002
Posts: 9,387
Likes: 4
From: Nashville, TN
interesting post about s5 TII FPR solenoid...
taken from nopistons.com
anyone heard anything about this?
Originally Posted by j9fd3s
so we are tuning a stock ecu s5 t2 with an fcon. it has all the emissions removed.
we put it on the wideband and you can see it go lean over 5000rpms, ok so we keep turning up the fcon and that just makes it bog harder below 4k but it really didnt change over 5k rpms.
we were thinking fuel pump until paul suggested the fuel pressure solenoid.
check the codes, we get #25, pressure regulator control (fuel pressure solenoid), i plug solenoid into connector
BAM!
10.9:1 afr all the way up to redline, problem fixed
this could easily pop your motor.....
we put it on the wideband and you can see it go lean over 5000rpms, ok so we keep turning up the fcon and that just makes it bog harder below 4k but it really didnt change over 5k rpms.
we were thinking fuel pump until paul suggested the fuel pressure solenoid.
check the codes, we get #25, pressure regulator control (fuel pressure solenoid), i plug solenoid into connector
BAM!
10.9:1 afr all the way up to redline, problem fixed
this could easily pop your motor.....
anyone heard anything about this?
The mystery of the prize.
Joined: Aug 2002
Posts: 832
Likes: 2
From: Bay area
It only matters if you still have the fuel pressure solenoid in the loop (inline with the vacuum for the FPR). It's a non-issue if the solenoid is gone and your FPR vac line straight to manifold.
the FPR wasnt doing it's job in the case j9fd3s refers to, the solenoid was still in the loop but not plugged into the harness.
the FPR wasnt doing it's job in the case j9fd3s refers to, the solenoid was still in the loop but not plugged into the harness.
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