more bad news

[kdog]

I am still working through my bank 2 lean code. I had my computer reprogrammed and now the code still comes on and I can still smell gas as I drive but at least my exhaust is not burning up my floorboards.

I have had current performance program the computer twice now and am getting tired of pulling my computer and sending it to florida.

I finally found a place that will do dyno tunes in my area. I am thinking I should just pony up the dough and get it tuned for my conditions with someone in person to make this thing run right. My 6.0L is running so poorly that I am getting 8.3 miles to the gallon and sounds more like a lawn mower. I was driving like a granny too.

My fuel pressure is at 55 psi as I mentioned before and I am going through some tests to figure out the best way to fix that.

With the conditions that I have described am I thinking right about getting a retune in person?

I just want this thing to run right before things get too cold! Besides we are having a baby at the end of Oct which will make working on this truck thta much more tricky!

[RedHeartbeat]

Buy two new O2 sensors and install them first. Buy the ones that go behind the cat in a C5 Corvette, two of them. I run them in my headers and my fuel mileage went back to about 15mpg and they switch properly.

[kdog]

Cool I'll look into that.

BY way of a weird update I rechecked my fuel pressure and it is more like 56.5 psi and does not jump higher when I connect it right to my battery. The weird thing is that when I pulled the fuel pressure dial of the motor and put the plug back in the fuel rail and drove the truck home the check engine light went off and I am smelling less gas. I'll be monitoring it further but maybe this plug was not in tight before and I was losing fuel before it even got to the engine, which could explain the lean code and extreeme fuel consumption as well as the gas smell.

Lets ses if I get lucky. Anyone think my theory might be right or might I be missing something?

[86 Silverado LS1]

Besides we are having a baby at the end of Oct which will make working on this truck thta much more tricky![/quote]

Thats a fact. Especially if your shop is in your basement.

Hey, how do you quote only part of a post the right way?

[kdog]

Buy two new O2 sensors and install them first. Buy the ones that go behind the cat in a C5 Corvette, two of them. I run them in my headers and my fuel mileage went back to about 15mpg and they switch properly.

I noticed when looking at the 2002 year sensors that the plugs do not match my plugs and the wire colors are different. Is there a year that you recommend or instructions regarding matching up the wires from my current o2 sensors?

Thanks

[RedHeartbeat]

What harness do you have, a NelsonPerformance harness?

[kdog]

the harness was built by Current performance and was supposed to use all the 2004 oem connectors. I am not sure if this is right though as other mistakes were made. In any case my front o2 sensors, as I don't have any in the rear, use two white wires and one blue and one green if my memory serves me correctly. The connector is shaped like this \__/ rather than just being square [_].

By the way the lean code has returned. I did swap the sensors to the opposite sides just for kicks even though I was told they were both working. We'll see if anything changes. I am not hopeful.

[kdog]

update:


There is a nipple on the top of my truck intake near the throttle body with an electrical plug and what looks like something similar to a bike tire nozzle. I am assuming this "unit" went to the emissions stuff like the evap canister. Is it possible that I could be getting a vacuum leak or otherwise getting air though this thingy? I was thinking about putting a vacuum cap over the nipple that is just exposed.

Thanks

[kdog]

I capped the above mentioned nipple and swapping the o2 sensors did not change anything the same code came back.

I resprayed the intake with carb cleaner with no change in rpm. I am at a loss here.

[foggy]

what code are you getting?