Hi,
in the '07 system I transfered to my 1997 Tahoe there is definitively no external return line to the tank, only a single line from the pump to the fuel rail on the intake . I don't see any sort of return ??
Harald
return line
Hi,
in the '07 system I transfered to my 1997 Tahoe there is definitively no external return line to the tank, only a single line from the pump to the fuel rail on the intake . I don't see any sort of return ??
Harald
If nobody has done it before, somebody has to do it....
1997 Tahoe 2dr 4WD
2002 Alfa Romeo Sportswagon 2.0 JTD
1982 Deutz Intrac 2004A
2003 friesian Horse " Henry"
Return systems: FPR is MAP-referenced (located between rails), IFR table is flat across, return line goes from FPR (located at the rail) all the way back to the tank.
Returnless systems: FPR is unreferenced (located in tank), IFR table is sloped (i.e. the PCM looks up IFR based on MAP (or rather MANVAC)), return line is at the FPR in the tank, FPR is BARO referenced.
Last edited by joecar; April 14th, 2016 at 10:14 AM.
could someone direct me to an IFR spreadsheet? the old link is no longer active.
PM me I may have what you are searching for
This one?
That is the one, thanks
Bingo
Please note the following with regards to the 1997-1998 Y-car:
the FPR has a return fuel line and a reference hose, but the reference hose references barometric pressure
(i.e. the FPR is open to the atmosphere, it is not referenced to manifold pressure);
this categorizes this FPR as un-referenced;
this is supported by the fact that the IFR tables are sloped (and calculation shows they agree with the Bernoulli squareroot pressure-flow relationship).
I made suitable corrections to post #1 above.
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