What is going on with this? New to hptuners and just finished putting an lq9 into my 97 chevy obs. No codes, no miss fires, injector pulse starts at 5.3ms and then bank 1 rises to 7.9 while bank 2 stays the same. Wouldn't a vacuum leak affect both banks? I unplugged the maf and the idle changed for like half of a second but continued to run rough. Put into gear it runs even rougher and shakes the truck and its got no power when I try to drive it, like it would if it were starting in 3rd or something. Any suggestions

 

Ugh just realized it wont let me upload a video. Whats in the picture is basically what its doing with some fluctuations. If that helps.

 

You have a dead miss, a dead o2 sensor, or an enormous exhaust leak on that side. You need to log o2 mv individually on each side.

 

bank 2 o2 sensor begins at 287 and climbs to 900 and slowly drops back down to 3 something and fluctuates from 3 something to 700 or so and bank 1 o2 hovers around 370 and drops down to 100s and fluctuates there. There aren't any exhaust leaks on either side, the only thing I can think of is the injectors being clogged since last time I messed with them at least 2 of them were completely dead. Also would a bad maf cause this? Or an intake gasket? Or would that affect both sides?

 

https://www.facebook.com/share/v/1JVG7AcaBk/

 

Odds are that a dead miss on bank 1 is sending unburned air out the exhaust, and the trims keep dumping more fuel to try to correct the o2 sensor lean reading that all the unburned air causes. Pull your plugs and see if 1 looks clean and the others are almost fouled out on bank 1.

 

log the misfire counters to see what cylinder it is, or use a IR temp gun and check the temps of each header tube.

 

Ok thanks, will report back with what I find

 

I did that but it showed 0 misfire on all cylinders.

 

all spark plugs on bank 1 are clean like brand new. Bank 2 are a little black but not too bad

 

all plugs on bank 1 are clean. Bank 2 are a little black but not too bad

 

If you are maxing out trims on bank 1 and the plugs are clean, there are 2 options. Either you have no spark, or you have no fuel to the entire bank. Are you sure you don't have the bank 1 coil packs backwards from front to back?

 

yes I verified that and injectors are all where they should be

 

well, they may be hooked up right but you were right None of the coils on bank 1 are firing. I wonder why though

 

Time to trace all your wires. Likely something either got pinched or pulled during the swap.

 

Probably lost ground to coils on that bank. Ive fixed alot of trucks with that issue that have come through the shop

 

I just checked grounds and they are connected unless its just not a good ground. I have each bank grounded to the cylinder head they're bolted to. I wonder if I need to add another battery ground to that head because I just realized there is no ground there besides the pcm ground at the back of the head.

 

I just checked. All wires are still connected and good. Im going to add another ground to that head and see what happens

 

Just figured it out. Theres a broken wire somewhere between the main connector on the coil harness to the coils themselves. I got it running good for a second and then went out and saw my spark plug test light flashing and plugged everything back in and decided to jiggle the wires and the problem started again. So I scanned it, got a misfire for coil 7. Started the truck again and moved the harness around and it started running good again, checked the short term fuel trim, looked good and got in to back it up and move it forward to see what would happen and spun the tires haha **** yes then I thought ok gotta find out why so I kept moving the harness trying to locate which side of the harness it's on and sure thing it is the harness behind the coils. Now where to buy a harness for the coils, im done messing with this thing haha