Throwing multiple codes! help!!

[dixie_boysles]

I'm baffled. The truck (4.0 SOHC) has been running beautiful. No hint of any malfunction. I get get off work, hop in truck, cranks and runs fine. Come home change, jump back I'm truck and crank it. It cranks and runs BUT, it starts idling rough (I mean really rough). I give it some gas and it sputters and spits back. No check engine light though. I get to end of driveway and the check engine light pops on and she dies. I crank her back up and she starts and runs but idling and sputtering really bad. I take the 4.0 plastic cover off and stat looking at the sensors. I unplugged the TPS and plug it back in. When I cranked it, it ran better (enough to drive and get codes read and get back home). When I get back home and turn it off and try to crank it again, its worse. Now it idles super low and just chugs. I got the following codes at Advance Auto:

P0122
System 2 Bank 1

P0171
System to lean
Bank 1

P0174
System to lean
Bank 2

P0300
Multiple cylinder misfires

P0122
TPS/Pedal
Sensor A circuit low input

I think I have these right. Wrote them down fast. Either way its throwing codes bad as you can see and it happened all at once which makes me belive its the TPS or a vacuum leak. Could possibly be the MAF sensor, but I'm no mechanic. Someone with knowledge of these 4.0s please help, I need this truck fixed tomorrow. Going to Advance tomorrow to get a new TPS and install it to see if that helps. If not, ill put original back on and then I'm clueless. PLEASE HELP. Thanks

 

[kimcrwbr1]

check the wires to the 0-2 sensors clean the MAF with maf cleaner or rubbing alcohol/electrical cleaner and disconnect the battery for 30 minutes when you clean or change a sensor to reset the computer. How old are the plugs and coil and wires and clean the ground to the coil and all other grounds take them apart and sand them metal to metal and inspect the wire and connectors. Once you look at all the basics and reset the computer then run the codes again after a good warm up and address the codes as you receive them lowest number first. every time you clean/change a sensor you need to reset the computer and erase the memory and see if the code goes away.http://www.therangerstation.com/tech_library/3digitcodes.html GL

 

[kimcrwbr1]

could be a short in the O-2 wire or a loose connection TPS or O-2 disconnect the neg terminal on the battery while your messing with the sensors and then see how it runs.

 

[dixie_boysles]

Hey thanks man! I'm gonna replace TPS in morning and ill be sure to disconnect battery to clear memory

 

[Yellowsplash]

It's not your O2 sensors. You have a vacuum leak. Plain and simple. Check your PCV system as its one of the most common issues.

Second, don't clear the computer by disconnecting the battery cable. By doing this you are losing all your fuel trim information that the computer has learnt over time. Losing this info can cause the vehicle to run worse. Your code reader can erase any and all codes easily without losing any other key info.

 

[kimcrwbr1]

He is going to change a sensor he needs to reset the pcm or it will rtun on old values with the new sensor