Do you have a wideband? Are you driving on a meth tuned map? If you are on the meth map I would assume they pulled a bunch of fuel out hence the reason you are getting the bank1 lean, what this means is your fuel trim is max positive and the system is still too lean. Could be the o2 sensor, but I would tend to think it has more to do with the map you are running at the moment, of course this is pure speculation and it has been a couple days since I read the whole thread.

i am on a meth tuned map but i have not gotten into boost what so ever without the pump working properly. so basicly im just daily driving around with the car. not going over atmosphere and it threw the code.

so are u saying that u cant daily drive with a meth tuned map without problems?

well yesterday the code cleared itself. i didnt clear it when i pulled it, it just disapeared when i started the car about 6 hours after i pulled it.

any thoughts on this?

code back after i re-installed the pump. the pump is back in and I installed all the fittings hand tight. took the car out, pump was spraying just fine. car pulled hard. driving to work today, the car pulled a code again. im assuming its the same code as last week. P0171 bank 1 too lean. i talked to AL and he told me that the injectors on deceleration arent pushing enough fuel so its throing a code. so i think i have to bring the car back to him and have it retuned.

update:

just went to my car to check for leaks and there was a very slow drip on the non pressure side. mind u i only hand tightened them. so i just took a wrench and went another half turn. so we will see now if she still leaks.

for a polymer oring to seal, you only need to compress it ~20% ie original width = 1.0mm, sealed width = 0.8mm. hand tight + ~1/4 to 1/2 turn will seal it well.

also watch for debris on the sealing face. methanol has very low surface tension/viscosity and will leak if there is debris between nylon head and sealing oring.

deabeat: couple things to check.. the system to lean P0171 code is from idle/cruising where your injector trims are maxed out in one direction. this could be from a couple things, the last of which i would say is anything to do with the meth kit. first, do you have different sized injectors? if so, they likely were not scaled correctly and at idle they are not injecting enough fuel. if you have a wideband, you cal tell by looking at your AFR at idle. if it sits at 15+ AFR (more likely 16-17+ AFR), then your going to throw the code. you need it idling at 14.7 +- a half a point. the other problem it could be is a boost leak. small boost leaks can effect the idle AFR by making it run lean anytime it is in vacuum. if you go to boost, it will run rich. if the leak is severe enough, your injector trims again will max out, throwing the code.

check both of those things, as i suspect one of them is your problem

i think its the injectors. they are 780cc and they are not scaled correctly for idle or deceleration. i have to have AL retune it.

You should pick up a tactrix cable and download a copy of mitsu logger so you can keep an eye on things yourself. If you were tuned on those injectors by AL and are throwing a bank1 lean code he should do the retune for free. Also, invest in a wideband man.

As a side note, I don't think the code "cleared" itself, more than likely the system went back into readiness test mode and re ran all the tests. I have seen this happen a few times.

Depends on who did the tune and how everything is setup. In general I would think that the map will be the same as the pump gas map up until the point where the meth starts to spray, beyond that point I would say hell no it is not safe to drive on a meth tuned map without meth since the meth map will have a fuel pulled out and timing added.

I tend to think that the spray onset will always ocure after you go into open loop and at that point the ecu is not checking or using fuel trims, but again that depends on how the system and maps are setup.

Sounds like you are on the right track now though

I will be taken care of, i can assure u that.

one thing im worried about is if im not on the gas and im running too lean, i dont want to melt a piston from not being on the gas. this scares me.

Emanuel - just bring the car back as we suggested and I will find and correct the problem at no charge. Sometimes, with 780 or larger injectors a small vac leak can make the car lean on decel or the decel area of the fuel map may need some minor adjustment. In most cases these problems are confined to closed loop areas of the map that I may not reach on the dyno or with my style of road driving. In other cases with high boosting cars the egr vac hose or other minor vac leak can develop that can trigger this problem. Either way its quick and easy to rectify.


Al

we will have to discus when i can drive down there.