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For full features; Go to I need to find where the knock sensor is located on a 89 buick park avenue
I need to find where the knock sensor is located on a 89 buick park
avenue,the car has been running very rough,the initial problem was the car
was acting like the fuel filter was clogging up, I replaced it,and the car
run ok for a couple of day's,then it started it up again, I would be going
down the road and the car would act like the fuel filter would clog up and
the car stop running,the check engine light would come on,after a couple of
minutes stopped,I would re-crank the car, and it would drive fine for 20 or
30 miles again, then the same problem would occur.
I bought a code scanner,It came back with code's 39.......43... and 44 and
all the codes point to the knock sensor and O2 sensor, so I went out,bought
the parts and can't find where the knock sensor is to save my life.
CAN ANYONE HELP???????????
Thank's in Advance to all!!!!!!!
Frenchie2u
frenchie2u
Let me help you out here.
Code 39 indicates there is an issue in the lock-up torque converter found
on most GM 3 and 4 speed automatic trannys since the early 1980's - there
is a solenoid which locks up the torque converter depending on vehicle
speed and what gear the transmission is in.
Code 43 indicates there is an issue in the electronic spark control circuit
- could be a knock sensor, or something else involved
Code 44 indicates excess O2 in the exhaust thus is an indication of a lean
fuel-air mixture.
Before replacing parts, I would test the O2 sensor following these
instructions
http://www.autozone.com/az/cds/en_us/0900823d/80/15/e2/c1/0900823d8015e2c1/
repairInfoPages.htm
and test the knock sensor following these instructions =
http://www.autozone.com/az/cds/en_us/0900823d/80/15/e4/5f/0900823d8015e45f/
repairInfoPages.htm
Knock sensor locations - On GM V-6's the knock sensor will be in one of
these locations - a. in the cylinder head driver side behind the valve
cover, b. head or block, passenger side near strut tower, or c. block
underneath exhaust manifold.
My gut feel is the TCC solenoid is an entirely different issue from the
other two.
If your O2 snesor and Knock sensor tests OK, I would be looking for an
intake manifold leak, leaks @ throttle body or fuel injector O-rings or
something along that line - excessively lean fuel mixtures will cause
detonation and the Knock sensor circuit in the ESC may not be able to
adjust the ignition timing enough to compensate
tbaxleyjr
Tbaxleyjr,
In the code book, code "39" states 3 different possible problems,
1)TCC
2) clutch switch circuit or
3) knock sensor (KS) short circuit problem
all the time, I haven't had any problems with the car shifting gears,just
running very rough,and turning off after 5 to 10 miles(basically, when the
car warms up)
Frenchie2u
frenchie2u
For code 39
items 1 and 2 indicates issues in the same basic circuit - either a bad
TCC solenoid or a wiring issue in the control circuit for this system
It also means a short in the knock sensor circuit - for trucks w/ 4.3L
engines and manual transmissions
sets when codes 28 and 29 are NOT present (indicating other issues with 3rd
and 4 gear feedback circuits), brake switch is off (no braking), ECM sends
signal to engage lock-up clutch (TCC), vehicle in high gear (4th on a Park
Avenue), engine Rpm:transmission rpm ratio indicates toque converter is not
engaged, and all of this happens for 15 seconds.
For this code there is either a bad TCC solenoid, issues with the wiring
between ECM and tranny, loose connections @ ECM or possibly bad ECM
For code 43,
The code sets when coolant temp > 133F, TP angle >4.7%, engine rpm between
2200 rpm and 6375 rpm and knocking activity detected for more then 4
seconds measured over a 6 second interval
in addition to the diagnostics I linked you to for the knock sensor, verify
the engine is in mechanical condition and verify the condition of the
wiring including connections or maybe a bad ECM
for Code 44
What is happening is the ECM is sensing voltage < 0.3V for 50 sec or more
from the O2 sensor, ecm in closed loop operation and code 33 or 34 (MAP or
MAF sensor circuits) are not set
This could be a bad O2 sensor (hence the diagnostics), bad wiring between
O2 sensor and ECM, loose connection, or bad ECM hence the O2 sensor
diagnostics. If the ECM and O2 sensor is good, then you have a lean fuel
air mixture issue (most likely manifold leaks)
Just to rule out other unrelated problems and allowing focus on these
sytems lets do this: immediately after the car dies, check the fuel system
and check for spark to help eliminate other potential issues. if these
check out OK, then look where the common issue is between the three
items??? ECM wiring, ECM grounds or possibly a bad ECM. You did not get
any quad driver trouble codes did you?
tbaxleyjr
