Buy a Toyota?

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OK not too sure what the conversion is from
km's to miles are but....From just reading your invoice information....I
noticed that after they replaced you injectors you had no new fuel
pressure reading....I understand that they did a leak down test and all
injectors dropped so they replaced them...But did they retest the fuel
pressure to check the fuel pressure regulator?
They replaced your upper intake gasket because they had to remove the
upper intake to get to your fuel rail to get out the injectors...Also
what was the air fuel ratio? sometimes the hard plastic vacuum lines
will get a kink in them restricting air which will cause it to run
rich...Also you IAC valve could have carbon build up restricting it to
open all the way..
And sometimes you will not get a code I had this before and it drove me
nuts untill I found out what it was......Also your timming could be off
a few degrees causing this condition but not enough to make it miss or
backfire....This is just a few more things to consider hope i was of
some help,,,,
Steve C

 
99 Malibu Fuel Problem  

Group: alt.autos.chevrolet.malibu Date: Sat, Mar 13, 2004, 1:54am
(CST+6) From: AScooby@snack.com
Hi all, I am having poor fuel economy since my last intake manifold
repair. i used to get about 370km's to a tank and now just over 200 km's
a tank. took it into the dealer and they found it was burning to rich
from the trouble code. ( P0172) Service invoice says Fuel pressure was
at 40 psi and regulator was checked for leak. fuel trim at -20 ,evap was
checked and found ok , changed maf sensor and fuel was found in the oil.
o2 sensor was changed which brought the trim to -18.
Just a note...all regular maintenance,tire pressure and all other
obvious upkeep has been done to this car and it has 72,000km's.
Faulty (silicone Fouled ) o2 sensor was the cause of the rich reading is
what dealer states the cause was...so i took the car home and ran a few
tanks of fuel through it with little improvement.
Took it back to the dealer , same trouble code for system burning to
rich...they installed a new maf sensor with no positive
effect...dicsonnected evap line...no change to trim numbers...fuel
pressure gauge was hooked up to test pressure and leakdown....pressure
was a little low ...injector balance test was done, found all 6
injectors to drop the same amount from 35psi to 0 psi....checked back
pressure...was found to be good..replaced all 6 injectors and upper
intake gasket...fuel trim at -9 and was at -22.
took the car home but didn't make it far as the smell of fuel was to
over powering...pulled over and called the shop....service writer say
they its just a build up of fuel in the manifold from the service and
would burn off shortly...ok...continued on my was for a little drive to
burn off some fuel...still smelled bad....parked it in the garage and
was going to deal with it in the morning.
next morning there was a strong smell of fuel in the garage, so i took
it back to the dealer..they found faulty O-ring's on the injectors and
repaired.
Sorry for the long read but trying to supply as much info as i can for
this repair as the mileage has improved to 285kms a tank but still am
about 100kms off from before and the dealer says that there is nothing
else they can do as they have checked everything.
Anybody have any ideas where i can steer these folks to repair my
vehicle as they don't seem to be able to fix or answer why the large
drop in mileage. any help will be appreciated.....thanks............J
all the above info was pulled off the work invoices for my car.