2003 Suburban. Reduced Engine Power
#1
Staging Lane
Thread Starter
iTrader: (1)
Join Date: Nov 2009
Location: PA
Posts: 73
Likes: 0
Received 0 Likes
on
0 Posts
2003 Suburban. Reduced Engine Power
Any solutions? My dads suburban randomly gets a reduced engine power reading every now and then. We have gotten it to disappear but turning off the ignition then turning it back on again, but then it reappears again during another drive or during the same drive.
Any possible fixes? from my research i've heard throttle body harness re wiring, checking battery connections.
Thanks.
Any possible fixes? from my research i've heard throttle body harness re wiring, checking battery connections.
Thanks.
#5
Moderator
iTrader: (11)
Join Date: Mar 2002
Location: East Central Florida
Posts: 12,604
Likes: 0
Received 6 Likes
on
6 Posts
You need to see immature codes as well as set ones.
One common cause of this "reduced power" mode is a
disagreement between the various airflow calculation
modes (MAF vs speed-density, speed-density vs
alpha-N). The PCM sees that one of these things is
not like the other, and plays it safe. If the electric
throttle body is coked up its position may not be
quite what it's supposed to and you can get a
disagreement between angle-RPM (alpha-N)
estimate and the MAP-RPM (speed density) one.
Probably either a hygeine or blind parts swapping
problem at the bottom of it.
Electric throttle is the Devil.
One common cause of this "reduced power" mode is a
disagreement between the various airflow calculation
modes (MAF vs speed-density, speed-density vs
alpha-N). The PCM sees that one of these things is
not like the other, and plays it safe. If the electric
throttle body is coked up its position may not be
quite what it's supposed to and you can get a
disagreement between angle-RPM (alpha-N)
estimate and the MAP-RPM (speed density) one.
Probably either a hygeine or blind parts swapping
problem at the bottom of it.
Electric throttle is the Devil.
#6
TECH Fanatic
iTrader: (10)
You need to see immature codes as well as set ones.
One common cause of this "reduced power" mode is a
disagreement between the various airflow calculation
modes (MAF vs speed-density, speed-density vs
alpha-N). The PCM sees that one of these things is
not like the other, and plays it safe. If the electric
throttle body is coked up its position may not be
quite what it's supposed to and you can get a
disagreement between angle-RPM (alpha-N)
estimate and the MAP-RPM (speed density) one.
Probably either a hygeine or blind parts swapping
problem at the bottom of it.
Electric throttle is the Devil.
One common cause of this "reduced power" mode is a
disagreement between the various airflow calculation
modes (MAF vs speed-density, speed-density vs
alpha-N). The PCM sees that one of these things is
not like the other, and plays it safe. If the electric
throttle body is coked up its position may not be
quite what it's supposed to and you can get a
disagreement between angle-RPM (alpha-N)
estimate and the MAP-RPM (speed density) one.
Probably either a hygeine or blind parts swapping
problem at the bottom of it.
Electric throttle is the Devil.
Get it scanned as a code WILL be stored!!!
Trending Topics
#11