Vortec Fuel pressure regulator Job TIP...Deluxe'
Posted to Technical Tips Forum on 5/5/2011
22 Replies
[1996 GMC C1500 Sierra SL, Fuel Supply Photo] [1996
GMC C1500 Sierra SL, Fuel Supply Photo] [1996 GMC C1500
Sierra SL, Fuel Supply Photo] [1996 GMC C1500 Sierra
SL, Fuel Supply Photo] Next time you do a fuel pressure
regulator job on a Vortec
Dan Habluetzel Thursday, May 5, 2011 12:45 PM (5 hrs ago)
... This is a repost to Tech Tips forum from Tech Discussion
forum....if Pix don't come out refer to that forum for the
Pix......they are impressive (IMNSHO)
... [Fig. 1] see above [Fig. 2] see above [Fig. 3] see above
[Fig. 4] see above
... Recently I was commissioned to repair a flooding
condition on a '96 GMC with 4.3 L Vortec and the notorious
"Spider" SCFI unit.....I always like to verify the
"dribbling" condition of the regulator prior to
replacement....so I reattached the fuel pipes and jumped the
relay....yup....dribbles......then I noted the "crispy"
appearance of the tubes that lead to the "poppitts"....and
the melted "rabbitt ears" of the poppitt retainer
clips(gone)....so I went a step further and wired my
injector "buzz box" to the pins up top and "fired" several
injectors and This [1996 GMC C1500 Sierra SL, Fuel Supply
Photo] [Fig. 1] is what I saw....and this [1996 GMC C1500
Sierra SL, Fuel Supply Photo] [Fig. 2] ...and this [1996 GMC
C1500 Sierra SL, Fuel Supply Photo] [Fig. 3] and also,this
[1996 GMC C1500 Sierra SL, Fuel Supply Photo] [Fig. 4]
....so....next time your tech(or YOU) do a FPR job.....take
the time to VERIFY the integrity of the TUBES....just takes
a few minutes.(charge for it,included in estimated
time)..and it could keep ya from having a COME BACK....or if
ya have one that "just don't run quite right" ......this
"internal fire" happened at an undetermined time in this
vehicles past and it could have motored right along until
the regulators failure (dribbles) made the hard starting
flooding occur...these "sprays" only would happen ONLY AS
the injector was told to "buzz" by FRED (Friggin' Rediculous
Electronic Device) and robbed the poppitt of it's ability to
deliver...but fuel WAS being misted into the airstream so
that cylinder WOULD (kinda) get it's intended spritz....but
then again....so would ALL the others PLUS their intended
spritz(when it's time was due)....this would make them run
PIG RICH with no APPARENT reason.....the fire "could" have
been from the dribble...probably was...thing is ....MORE
damage WAS inflicted that might not be detected WITHOUT this
"buzzing" of injectors that I did....next one YOU
do.....remember this test and DO IT!! I hope my PIX come out
as good as they looked on my phone and computer
screen....first time to send PIX for me.
....Dan Habluetzel. ... South Texas...
Dan from Texas
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