Bank 1 is maxed out on my car at 25% on the ltft. I have pulled the plugs and all were fine except #7 which was black and sooty. I have replaced header gaskets and checked my plug wires ,what should I look for that would cause 1 cylinder to run rich

 

swap injectors, #7 could be stuck or binding.

 

I have noticed that it takes about 15-20 seconds for my fuel pressure to come all the way up, could a sticking injector be the cause of that?

 

That's definitely weird.

Eliminate some possibilities.
Run power to the pump with the ignition on and the engine off. It should jump right up to operating pressure in like a second. If not check the regulator and pump and possibly fuel filter.

Maybe you could use a mechanics stethoscope and listen to the suspected injector and see if it's cycling the same as the others?

 

If you were losing that much fuel through one injector I would expect to see raw fuel coming out the exhaust and excess raw fuel in the oil. You may have some raw fuel in the oil from that cylinder but no where near as much if that cylinder was actually using most of your fuel system flow/pressure.

It takes ALOT of fuel flow (especially thru one injector) to cause a healthy fuel system to react as you describe since basically would have to be flowing at the absolute max if that was the cause pressure takes to long to build. A restriction somewhere (lines or even the pressure gauge) could be causing the pressure delay problem.

Look at it this way, your stock injectors which are around 24?lb/hr x 8 = 192lb/hr from all injectors. A stock system can flow up and beyond 100% of the stock injector's rated fuel flow, so even assuming 192lb/hrs your stock system should be able to flow at 43psi. If Cylinder 7 Injector was responsible for your fuel pressure loss then that would mean that injector alone is flowing around 192lb/hr. This is very unlikely.

 

Leakdown test time.

 

noticed this morning on my way to work that while i was going at about 1700 -2000 rpm the ltft`s were good at about 3.1% but as soon as it came to idle bank 1 jumps to 25%

 

Might just be a normal leaky injector. A guy at work has a LS1 with leaky injector, his runs good except at idle and light load. Runs great after a PCM reset until the PCM starts pulling fuel and making that side run lean, so lean that it starts to missfire slightly and set random missfire codes.

His was so bad that we shut off the engine when warm, held the throttle to the floor, and cranked it. The cyl with the leaking injector actually fired each time for almost as long as we held the key.

 

I had the same thing - but it was an intake leak at the rear which resulted in two problems:

1. oil being sucked into #7, causing sooty spark plug
2. extra air being pulled into the combustion chamber, hence O2 sees a lean condition, so your fuel trims add fuel.

Just my .02 - good luck with your problem.

 

ok I changed plugs in #7 and ran it for a few weeks pulled it today and it was fine, nice and tan and I also moved injector #7 to the other side with no difference in fuel trims. It still is maxed out on bank 1 . Outside of pulling the intake is there anyway to check for a leak that could cause my problem or any other suggestions would be appreciated

 

I do not know of a way of checking a leak besides spraying starting fluid or WD-40 or something around the intake when running near the ports see if the RPM changes at all, something too flamable could be a hazard though.

not sure if this is right, if they are wrong then switch them around.
Maxing @ 25% = it's adding fuel due to it reading lean? That could be intake leak, valve/cam/lifter problem.. check compression on that cylinder and compare to others.
Bottomed out @-25% = leaky injector type problems (reading too much fuel).

You could also check your individual injector cylinder balance settings see if something's wacked out there.

If it's none of that then it could be your throttle body (especially if it's not stock) or the cam, of combination of both.

Back when I had 02's in closed loop I improved my blm problems by adding a tube from the BBK? IAK port or whatever I have throttle body to the matching intake port, this is suppose to help, first of all make sure your IAK is working ok and is controlling most of your idle (make sure idle is not being controlled too much by the position of the main throttle since this can mess up BLM's)

 

I have adjusted the valves to 1/2 turn past zero lash I did it with the car running .What else in the valve train could cause it. The car runs good wot but at low rpm it runs very rich. I am running denso o2 sensors and switched them from side to side and that didnt help either.

 

I have drilled my tb but i didnt put in the little piece of metal that I have seen other people do, but my idle does move around alot from 900 to 1000 rpm and the tuner set it up for 875 rpm but it has never gotten that low.It also will idle up to about 1800 rpm when I am rolling up to a stop with the clutch in then it will settle down. It has a new iac motor and I assume I set it right using Shoeboxes website

 

What is your IAC reading at idle?

 

I have an innova scanner and it doesnt have iac count on it unless i am blind or stupid and dont see it or its listed some other way.