iceman1987
3/12/2007 2:11:09 PM
the check engine light came on so i bought the obd1 or whatever its called. and it gave the code 12,22,23,33 i replaced the MAF sensor but it is still giving me the same codes...........why?
20Blazer00
3/12/2007 2:28:02 PM
Would be more helpful if you put your truck information in a signature and turned on signatures with posting...
iceman1987
3/12/2007 2:49:00 PM
ok, sorry bout that. 1989 s-10 blazer 2.8 v6 4x4.
MNHawk
3/12/2007 2:50:09 PM
did you clear the codes after you replaced the MAF?
DTC - 12 No distributor reference pulse (diagnostic test active)
DTC - 22 Throttle position sensor error (signal low)
DTC - 23 Intake air temp sensor error (low temp indicated)
DTC - 33 MAP sensor circuit error (signal high indicating low vacuum)
Looks like replacing the MAF was not the issue. Looks like you have vacuum leak for one. And possibly a bad TPS sensor.
iceman1987
3/12/2007 2:50:58 PM
how do you clear the codes? unplug the neg?
MNHawk
3/12/2007 2:55:58 PM
quote:
ORIGINAL: iceman1987
how do you clear the codes? unplug the neg?
Normally what I do is disconnect the power for 10 min, then start it up without touching the gas. Let it idel and warm up. Then see if the SES light comes on again.
MNHawk
3/12/2007 3:05:17 PM
If the codes return ref. back to my first post. It has the list of each code you posted.
Good luck
iceman1987
3/12/2007 3:08:48 PM
i have a question, is the MAP sensor the same as the MAF sensor?
20Blazer00
3/12/2007 3:36:18 PM
quote:
ORIGINAL: iceman1987
i have a question, is the MAP sensor the same as the MAF sensor?
No
MAF=airflow [Mass Air Flow]
MAP=airpressure(vacuum) [Manifold Absolute Pressure]
They take measurements at different places...
swartlkk
3/12/2007 3:38:11 PM
An '89 2.8L has a MAF sensor?
iceman1987
3/12/2007 3:58:41 PM
so i dont have a MAP sensor do i?
20Blazer00
3/12/2007 10:43:22 PM
quote:
ORIGINAL: iceman1987
so i dont have a MAP sensor do i?
You got a MAP sensor...GM added the MAF sensor with OBDII systems to better control emissions...more sensors = more control???
iceman1987
3/13/2007 12:12:33 PM
well in my truck i have the OBD1 so if i dont have the OBDII then i would not have the MAP sensor right....im just trying to find out what i have to replace.
swartlkk
3/13/2007 1:32:11 PM
Your truck has a MAP (manifold absolute pressure) sensor.
The MAF sensor was introduced in the 96+ SCFI motors, IIRC.
