Hi there...I have a 90 chevy beretta v6 3.1 that I purchased from a
friend that recently started dying after it ran for awhile. It would
restart, but then immediately afterwards die. I took it into a repair
shop to see what they could find out, as I don't have computers to
check all that fun stuff. On a side note, I replaced the fuel pump and
filter (for fun it appears). The shop claims that my fuel injectors
aren't firing properly, and that I need to replace at least two of
them, and possibly all 6, quoting me some ridiculous $700 figure. I am
pretty confident in my ability to fix things that I can locate, but I
have never worked with fuel injectors before. I am basically asking if
it is even worth fixing the fuel injectors, and whether this diagnosis
is correct. Also, if peeps could give me some advice on the actual
process of replacing them, I would love that too... like I said, I
know my way around a car enough to keep it out of the shop for
everything but the really major repairs, so I would like to figure out
how to do this on my own and avoid those huge shop fees (college
student sucks huh?). Any help would be appreciated, thanks peeps.
Remanufactured injectors can be gotten here:
On an 18 year old car it probably doesn't pay to buy new
Replacing the injectors isn't hard, you'd be best served to
consult a good service manual. basically, you need to; bleed off
the fuel pressure, remove the upper intake manifold, disconnect
the fuel lines, unbolt the fuel rail, remove the fuel rail with
injectors from the lower intake manifold, disengage the
injectors from the fuel rail, flush the fuel rail with a clean
solvent, blow it dry, install the replacement injectors,
reinstall the rest in reverse order...
Are they bad? Probably. The injectors used by GM during that
era are notoriously failure prone. depending on your skill level
and equipment, there are a few tests that can be performed to
verify whether the injectors are failed.
The most common failure is shorted windings in the injectors, the
shorted winding causes excessive current flow thru a component in
the engine computer called a driver, the engine computer will
shut down in an effort to protect itself from the over current.
Yeah I almost always buy remanufactured, but maybe that comes from
owning sub 1k cars :P
I have a chilton's manual that shows me most of it, but that doesn't
necessarily explain everything. Hopefully I can take this info and use
it to expand on my net searches to get some more details. Thanks a
shocking, GM produce cheaply made parts during the 90's? Never :) I
just replaced an intake manifold on my Buick, and helped a friend with
her head gasket on her Monte Carlo...all from my favorite engine type
of all time, the 3100 series!
Thats basically what they said, that it was getting too much fuel
which caused the computer to register it as overheating and then it
would shut down. Basically this car is going to be a gift to a friend
to help him get back on his feet, but at 700 dollars who knows. If we
can work our way through this, hopefully we can get this going for
him. Thanks again for the help, and I appreciate any more help that
can be given.
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