Baffled... Bank2 extremely lean Bank1 normal
Baffled... Bank2 extremely lean Bank1 normal Any suggestions or comments?? I just installed the 90mm intake/TB, new valve stem seals, plugs, and wires. Using HP Tuners I made changes for the 90/90 setup and fired the car. It ran and sounded terrible, like a boat. Throttle response and power were not there. I spend a few hours messing with the tune with minimal effects. Finally said screw it and put the 78mm setup back on and uploaded a known good tune to see if it was a 90/90 issue. The car ran the same. So I put another new set of plugs in, installed the old wires, and re-ran the valves just to make sure. No change. What is weird is that when logging Bank 2 it was reading at least 1/2 the mV that Bank 1 was. I didn't think much of it because my WB was reading about normal, 14ish. Now I am thinking a bad O2 sensor on Bank 2. So I switch the two front O2s in hopes the problem will follow the sensor. I had the WB screwed in the driver side collector (Bank 1) during all this so I moved it over to the passenger side as well. The problem did not follow the sensor and B2 is still reading 200-300mv. The WB is now reading ~17.5. Ok so there is obviously a fueling issue. I had an old fuel rail with my stock injectors in it. Installed those and re-flashed with an updated IFR table. Same damn thing, B2 is extremely lean.
I am guessing that fixing the lean bank will also fix the horrible exhaust note and lack of throttle response? What else could be causing the passenger side to run this lean and the driver side to be fine?
I am guessing that fixing the lean bank will also fix the horrible exhaust note and lack of throttle response? What else could be causing the passenger side to run this lean and the driver side to be fine?
bad o2 sensor or wiring possibly, swtich o2s and if they follow get some new o2s. ive got a year old set for sale if this is your problem and you want them
if that doesnt fix it look for any wires that could have been pinched or cut on the install
if that doesnt fix it look for any wires that could have been pinched or cut on the install
Originally Posted by WS6FirebirdTA00
bad o2 sensor or wiring possibly, swtich o2s and if they follow get some new o2s. ive got a year old set for sale if this is your problem and you want them
if that doesnt fix it look for any wires that could have been pinched or cut on the install
if that doesnt fix it look for any wires that could have been pinched or cut on the install
Originally Posted by CrazyCarl
So I switch the two front O2s in hopes the problem will follow the sensor. I had the WB screwed in the driver side collector (Bank 1) during all this so I moved it over to the passenger side as well. The problem did not follow the sensor and B2 is still reading 200-300mv. The WB is now reading ~17.5.
Originally Posted by WS6snake-eater
Check all the injectors on bank 2...It sounds to me like one is not plugged all the way back in. ie bank 2 is only fueling 3 cylinders.
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Originally Posted by CrazyCarl
I agree bank 2 might only be fueling 2 or 3 cylinders but I tried two different fuel rails and two different sets of injectors.
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Originally Posted by WS6FirebirdTA00
are all your injectors turning on when the should? put a screw driver on each injector and listen for noise from them, should be a pulsating tick
Originally Posted by WS6FirebirdTA00
yeah.
Honestly I don't think anything was dropped into the motor. Leak down numbers show the same as before the install. I was testing this because of oil consumption and the valve seals swap.
Originally Posted by WS6FirebirdTA00
you can log misfires for each cyl, thats about all i can think of. log the pulse widths for each bank and see waht they say too
Bank1 Bank2
Current 36# inj. 4.4ms 5.6ms
Old 26# inj. 7ms 9ms
That holds true throughout the log, a 1.2ms delta on the 36# and 2ms on the 26#. That means that Bank 2 injectors are working harder but does that really tell us anything?
TECH Fanatic
Joined: Mar 2003
Posts: 1,839
Likes: 0
From: La Porte, TX
Instead of swapping injectors, I would just try swapping injector harness feeds. ie plug the feed from bank 2 into bank 1 and vice versa...See if your condition changes to the other bank. BEFORE DOING THIS, SOMEBODY PLEASE VERIFY THAT HE WILL NOT COMPLETELY **** UP HIS ENGINE, DUE TO FIRING ORDER. I'M JUST THROWING IDEAS OUT MY ***. I DON'T THINK IT WILL MESS ANYTHING UP BUT I COULD BE WRONG.
Ok, found something interesting out last night. I unplugged the Harlan two step from the coil packs and then some DTC appeared for Bank 2.
P0352 - Ignition Coil 2 Control Circuit (Pending) (Immature)
P0354 - Ignition Coil 4 Control Circuit (Pending) (Immature)
P0356 - Ignition Coil 6 Control Circuit (Pending) (Immature)
P0358 - Ignition Coil 8 Control Circuit (Pending) (Immature)
Thinking those coil packs were bad I swapped the pass with the driver side and vice versa. No change. Both sets of coil packs throw these codes repeat ably.
What would cause the whole bank to throw the code? I must have unplugged and re-plugged the connection a dozen times thinking it could have been just loose.
Also removed the intake again and swapped the intake o-ring gaskets around. Then checked for any vacuum leaks. I can not find any. So I believe the problem to be with the fuel or spark.
P0352 - Ignition Coil 2 Control Circuit (Pending) (Immature)
P0354 - Ignition Coil 4 Control Circuit (Pending) (Immature)
P0356 - Ignition Coil 6 Control Circuit (Pending) (Immature)
P0358 - Ignition Coil 8 Control Circuit (Pending) (Immature)
Thinking those coil packs were bad I swapped the pass with the driver side and vice versa. No change. Both sets of coil packs throw these codes repeat ably.
What would cause the whole bank to throw the code? I must have unplugged and re-plugged the connection a dozen times thinking it could have been just loose.
Also removed the intake again and swapped the intake o-ring gaskets around. Then checked for any vacuum leaks. I can not find any. So I believe the problem to be with the fuel or spark.
TECH Fanatic
Joined: Mar 2003
Posts: 1,839
Likes: 0
From: La Porte, TX
Originally Posted by CrazyCarl
Ok, found something interesting out last night. I unplugged the Harlan two step from the coil packs and then some DTC appeared for Bank 2.
P0352 - Ignition Coil 2 Control Circuit (Pending) (Immature)
P0354 - Ignition Coil 4 Control Circuit (Pending) (Immature)
P0356 - Ignition Coil 6 Control Circuit (Pending) (Immature)
P0358 - Ignition Coil 8 Control Circuit (Pending) (Immature)
Thinking those coil packs were bad I swapped the pass with the driver side and vice versa. No change. Both sets of coil packs throw these codes repeat ably.
What would cause the whole bank to throw the code? I must have unplugged and re-plugged the connection a dozen times thinking it could have been just loose.
Also removed the intake again and swapped the intake o-ring gaskets around. Then checked for any vacuum leaks. I can not find any. So I believe the problem to be with the fuel or spark.
P0352 - Ignition Coil 2 Control Circuit (Pending) (Immature)
P0354 - Ignition Coil 4 Control Circuit (Pending) (Immature)
P0356 - Ignition Coil 6 Control Circuit (Pending) (Immature)
P0358 - Ignition Coil 8 Control Circuit (Pending) (Immature)
Thinking those coil packs were bad I swapped the pass with the driver side and vice versa. No change. Both sets of coil packs throw these codes repeat ably.
What would cause the whole bank to throw the code? I must have unplugged and re-plugged the connection a dozen times thinking it could have been just loose.
Also removed the intake again and swapped the intake o-ring gaskets around. Then checked for any vacuum leaks. I can not find any. So I believe the problem to be with the fuel or spark.
I'm still leaning towards a fuel problem...A spark problem would cause you to run Rich. A fuel problem would cause you to run lean. Maybe something simple did you check the fuses for the injectors? There is one for each bank.
I would try swapping back to the stock injectors and re-load the stock injector mapping in your tuning software. You need to eliminate as many variables as you can.
I would clear the coil codes and try again, with stock injectors and stock injector maps.
Also check the fuses for the coils, you probably blew the one for bank 2 when you unplugged the two step.
Originally Posted by WS6snake-eater
I'm still leaning towards a fuel problem...A spark problem would cause you to run Rich. A fuel problem would cause you to run lean. Maybe something simple did you check the fuses for the injectors? There is one for each bank.
I would try swapping back to the stock injectors and re-load the stock injector mapping in your tuning software. You need to eliminate as many variables as you can.
I would clear the coil codes and try again, with stock injectors and stock injector maps.
Also check the fuses for the coils, you probably blew the one for bank 2 when you unplugged the two step.
I would try swapping back to the stock injectors and re-load the stock injector mapping in your tuning software. You need to eliminate as many variables as you can.
I would clear the coil codes and try again, with stock injectors and stock injector maps.
Also check the fuses for the coils, you probably blew the one for bank 2 when you unplugged the two step.
I need some more ideas here. What else would cause bad fueling to Bank 2?