why would i only have 26 lbs at the rail and a drainback problem like i said before? that has absolutly nothing to do with mil eliminators. key on pump runs 3 sec i have 30 lbs soon as pump is off key still on back to 0 lbs no lag. i still have a fuel problem. bbk says to have the stock pressure at 39 lbs. if i unplug the vacumn at the regulator it goes up to 40 lbs and runs better.

the code is p1152:Lack Of HO2S21 Switch - Sensor Indicates Rich

what would that have to do with the back o2 sensor? isnt that the upstream that is throwing the code?
like i said ive been going around with this for a while now and just cant figure it out.

 

The reason why I say you have no fuel problem is this: The problem didn't occur until after the mid-pipe swap.

You either have an exhaust leak at the sensors or you have a sensor that is failing and giving you this CEL.

 

i had to replace the crappy because it started to leak like the day i changed out the midpipe that made me find that the no 1 injector nozzle was cracked so i changed that out but that is the day i started getting this code. i bought a motorcraft injector, maf, and am still getting this code. i might have had the pressure problem but not now about it. but now i have a drainback problem and that is a pump problem because that is where the check valve is right? so i want to fix that too. i thought i might have an injector leaking because i didnt replace orings. thats why im doing that. so you still think it has to do with the bank 2 pos 1 o2 sensor which i changed that out. but you think it could still be the mil eliminators?

 

After fixing a problem car myself, I found that you need to start with the little & obvious things first as 90% of the time this is the issue.

Since your car is a 98, it won't hurt to go ahead and replace your O2 sensors. Also, it doesn't surprise me that you tripped a code after the MIL installation, as many people have this issue & the same code right after a MIL installation, typically it's the Steeda MIL's giving people code fits.

I have a little trouble understanding your posts sometimes, so if it seems my replies are far fetched...

 

do you have a computer chip or something like that beheivjer?

 

i changed out the o2 in the front would the back be bad make a code seems the eliminators are actually sending the voltage? i know you are trying to help and one person explaining it doesnt always make alot of sense too.

 

i had the same problem. i had a chip and eliminators, the chip tricks the computer into thinking it has cats and so does the eliminators, so i took off the eliminators and problem solved! if thats not the problem then reset the computer again. i dont know why but that work for me after resetting the computer a second time

 

ive reset it about 10 times now and still have the problem

 

I'm with him on this one, it is almost definitly a fuel problem, and it is not just a matter of re-setting the computer.

 

I was just thinking about this today and trying to break things down in my head.

The pre-cat o2 sensor is the problem. Which means, it should have nothing to do with me being catless, because there pre-cat o2 sensors.

So, what would throw a functional o2 sensor into spaz mode. This car goes from running rich to running lean every day I'm driving. What would do this...