motor idles up and down 93 regal 3.1
#1
motor idles up and down 93 regal 3.1
Motor idles up n down in 500rpm blows black smoke and dies when u put in gear. How many airffliw sensors are I replaced the 2 bolt round one. What else could this be computer? Cat? Any suggestions on what to repair next
#2
Senior Member
The IAC (intake air control) can cause this.Got a photo of what u replaced?
The TPS can cause issues, and the other is the Maf or mass airflow sensor.
Did u have the vehicle scanned for computer codes? Is the check engine light on?
The TPS can cause issues, and the other is the Maf or mass airflow sensor.
Did u have the vehicle scanned for computer codes? Is the check engine light on?
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1997 Buick Pk Ave (Soft Ride) Suspension!
1997 Buick Pk Ave (Soft Ride) Suspension!
#3
Senior Member
True Car Nut
What is the "2 bolt round one" you replaced? Was that the Idle Air Control? The would be the first thing I would look at. Next would be the throttle position sensor. Here is a write up on how to test it:
https://www.gmforum.com/trouble-shoo...sensor-279319/
Also, check for any vacuum leaks.
https://www.gmforum.com/trouble-shoo...sensor-279319/
Also, check for any vacuum leaks.
#4
No codes were shown to last mechanic. He couldn't communicate with comp. He thought that was the issue. If I replace computer is it just plug n play or would it need programming
#5
Senior Member
True Car Nut
I'm not sure it is the PCM though, is the mechanic using a scanner that can communicate with OBD 1.5?
#6
Senior Member
True Car Nut
i think 93 would just be obd1. they had the chips, but if you get a different pcm and put your chip in it that still could be the problem. i would go through the mentioned tests first, pcm is normally last resort and not a very common failure
#7
Senior Member
True Car Nut
You're right Justin, my mistake, it was 94' and not 93' when OBD 1.5 came out, that is what I get for posting after being up all night.
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07-22-2012 10:43 AM