okay i just put long tube headers and true duals on my 99 1500 4x4 with the 5.2 i have no cat and dont want one i put a o2 siulator on the down stream o2 sensorbut now my truck sputters and boggs down until fully warmed up i got 3 codes for both o2 sensors high volts and high input from map sensor im getting about 4-5 mpg

 

the front o2 sensor has a lot of control of fuel mix. is yours new, or old or what. it sounds like it might have gotten broken. where is it installed? H-pipe?

i'd guess the rear 02 code and the map codes are caused by the problems associated with the front 02. i'd ignore them for now and work on front 02 only.

 

Once its warmed up does it not have the sputtering and bogging problem?

 

the o2 sensors are stock with 170000 and ture dual the 1o2 sensor is in the end of the passenger side header and the 2o2 sensor is in the other pipe with the o2 fouler and when it heats up it pretty much runs fine with bad gas mileage

 

my feind said it might be the tps goin bad but idk im lost

 

i'm confused. did your truck originally have 4 02 sensors, or only 2 ?

 

no it only has 2 one in the header (aftermarket long tubes) and the downstream o2 sensor is in the other pipe with an o2 fouler... see i have true dual which is no x pipe or h pipe just on pipe for one header and another pip for the other header

 

so if you have have the front o2 in the passenger side,
and the rear 02 in the drivers side,
what/where is the 02 simulator you mentioned.

i think you'd be better off with the downstream 02 sensor just hanging out in the air, rather than in the un-cat'ed exhaust. otherwise its likely to always thow a code. i'm also not so sure about having the front 02 in only one pipe, since you're only monitoring one side of the engine.

if the front 02 is old, i'd start by replacing it.

 

Well the o2 fouler I have is a spacer that spaces the downsfream o2 sensor out of the exhaust but so yeah the exhuast shop told said they done this a lot and it works every time but they couldn't explain y it was doin this they said something else was wrong

 

Okay so I just used a scan tool and both o2 sensors are pegged at 1 volt and its dumping gas out the exhaust so I'm gonna replace the first o2 sensor and see if that fixes it