Bank 1 fuel trim fluctuations
04-27-2009, 07:01 AM
#1
TECH Apprentice
Thread Starter
Join Date: May 2006
Location: Nebraska
Posts: 308
Likes: 0
Received 0 Likes
on
0 Posts
Bank 1 fuel trim fluctuations My ignition coils, plugs, wires, and 02 sensors are fine....but the fuel trim on bank 1 is fluctuating for no apparent reason...what are some causes aside from the ones I've already checked above?...
stroker2112
stroker2112
04-27-2009, 07:09 AM
#2
TECH Apprentice
Thread Starter
Join Date: May 2006
Location: Nebraska
Posts: 308
Likes: 0
Received 0 Likes
on
0 Posts
forgot to mention the injectors....Cylinder 1,3, and 7 plugs were somewhat fouled(heavy carbon)....5 looked clean(?)...should I swap injector #5 with a new one to see what happens?
05-01-2009, 07:53 AM
#3
You may have a miss on cylinder #5.
If it doesn't fire it will pump fresh oxygen into the exhaust which will 1) send the Lterms crazy 2) Force the car to dump fuel as it incorrectly tries to bring the a/f back into line.
Log misfires, see if cylinder #5 or one on B1 is racking them up.
If it doesn't fire it will pump fresh oxygen into the exhaust which will 1) send the Lterms crazy 2) Force the car to dump fuel as it incorrectly tries to bring the a/f back into line.
Log misfires, see if cylinder #5 or one on B1 is racking them up.
