LTFT not balancing, what could cause this?
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From: Sierra Vista, AZ
LTFT not balancing, what could cause this? What would make B1 slightly negative, and B2 peg out +25% (STFT +50%), IPW is B1 3.9, B2 7.8 or so. Also did a Cylinder Balance and all seemed close enough, but the Misfire (using a stock misfire table) showed Cyl 6 as have over a 1000 more misfire counts then any other cyls, and cyl 1 being the lowest, most were in the 350-450 range, but #1 was 79 and #6 was around 1500 (fifteen hundred).
I have some ideas but want to see if I am missing anything:
O2 Sensors
Exhaust leak, Collector and header gasket
Injectors
Broken Springs, pushrod bent, rocker arms trashed etc..
Thats all I can think of.
Charlie
I have some ideas but want to see if I am missing anything:
O2 Sensors
Exhaust leak, Collector and header gasket
Injectors
Broken Springs, pushrod bent, rocker arms trashed etc..
Thats all I can think of.
Charlie
Start by swapping the easy external stuff on #6
with (say) #2; plug, wire, coil, injector, one thing
at a time. Watch for the misfire count discrepancy
to move and follow some part to #2 (or, just go
away from something being fiddled, like the plug
wire clip finally seating).
One whacked cylinder can mess up the O2 sensor
by dumping excess air & fuel unburned into the pipe.
with (say) #2; plug, wire, coil, injector, one thing
at a time. Watch for the misfire count discrepancy
to move and follow some part to #2 (or, just go
away from something being fiddled, like the plug
wire clip finally seating).
One whacked cylinder can mess up the O2 sensor
by dumping excess air & fuel unburned into the pipe.
