If i bought a new computer does it need to be calibrated

It may be possible to manually calibrate the rear ride height sensor on a 2007 QX56 without a scanner tool, but it is not recommended. The calibration process typically requires a specialized diagnostic scanner tool and should be performed by a qualified technician with the proper equipment and training. Attempting to calibrate the sensor manually without the appropriate tools and expertise could lead to inaccurate readings or even damage to the vehicle. It is best to take your vehicle to a certified mechanic or dealership for proper calibration.

the 1991 G16a has a pig tail connector, must have 4 wires.
and shares the Injector connector (tricky pin pulls, and all)
that connector you gander is the injector /TPS connector
it has 6 pins but only 4 are for TPS. (yellow /.red are injector)
see page 3 below, for what all this means. last link below.


try to keep in mind, your car has a VIN engine code U (not 6) code 6 , has no pig tail, TPS.
GM uses U code to say, engine is 8valves, TBI, G16a , my guess, (no photos) is your bought TPS is
with tails, and is correct for your 8v engine.

Install, (need feeler gauges to do it)
it's not just thrown on to the car, it must be calibrated.
or the idle switch WILL fail.(and more)
one maker of this TPS is here: (hard to find)
SMP makes one. sMP #TH-147 is for 8V tbi.

http://www.fixkick.com/buy-parts.html#TPS
do not use 16valve parts on your car.

here is the calibration steps.
http://www.fixkick.com/sensors/tests/TPS-testing.html#8v_FSM_cal

the factory page is here
http://www.fixkick.com/TPS/TPS-p91.JPG

http://www.fixkick.com/TPS/TPS-p92.jpg

and page 3 here
http://www.fixkick.com/TPS/TPS-p93.JPG

the last page shows the tricky pin pulls....


you must pull the old pins.' one by one.
then put in then new TPS pins , in the same places of old
matching COLORS.
then do the calibration steps above, using feeler gauges.
same basic steps, from 1989 to 1998.
in 1999 they calibrate it to 0.5vdc, only.
later years, it auto-calibrates.
if the new TPS fails to cure the problem
post the symptoms, and win.

On a new unit, the memory spaces for past calibrations are empty. The calibration memory gets filled during early operations and then the error should go away.

I doubt the ECM from a C body would work on your Century. I would probably buy a used computer and prom from a car exactly like yours. The prom is calibrated to the body style, engine, and trans. Each year and model can be different due to emissions standards.

not generally

On a 4.0L engine Napa part # XTP91172 no calibrating need. Also stocking item.Cost about $290.00

On a 5.2L engine napa part # XTP91169
Pre flash ( calibrated ) at factory

Computer O.E # as follow
4886697
4886762
4886803
4886949
56041169
56041266
56044304

Check your computer # to one of these if a match computer will work. No calibrating needed.

Yes you need to calibrate your car level with computer

don't think any calibration will be needed if you installed the correct model.

Took back to store where bought tires and rims. They also put the computer on, but they drove with it attached and the tech who was in passenger seat said left front wheel not calibrated as the others so he calibrated all wheels to .05 at the maximum tire allowance. This has stopped the brakes from grabbing.

Said that the factory had programmed in for 16 inch rims. Jeep came standard with 18 inch.
Now everything working great. Don't know why dealership could not do this properly. Happy I bought tires and rims from a reputable and knowlegeable store. (Tire Craft) Thanks Mike.

Did you check the blend door motor? they will break and cause the door to not move. the dealer can run it thru a mode/blend door test. They just try to move the door with the obd computer they can calibrate them as well.