ok I decided just for the hell of it to swap my tps cuz I had one sitting around from another motor. Its about the only non new sensor on the motor. I decided to not plug it in when I restarted it and it ran better than ever! Ive had issues with a high idle and rough running when it hits around 170 (Im guessing closed loop) and seems to be really rich. Now Im not happy with it like that cuz it doesnt want to go over about 3300 under full thottle. It also started to act up after I ran it awhile. In first gear at 3300-3400 its ok and in second it drops to around 3100 and then in third its impossible to shift into 4th with the stall converter.

another question is: I have a 2400 stall and it never wants to shift until after 3000, why?

 

somebody else has got to know why this thing doesnt like closed loop when the tps is unplugged

 

There is no closed loop when a sensor is unplugged. In that scenario, the PCM goes into limp mode. The PCM has code written into the program to make the car not run 100% when in limp mode. The logic is that you will bring the car in for service sooner if the car acts funny when the check engine light is on.

 

It runs better because it dumps more fuel into the engine so it wont go into a lean condition. Or at least thats what my shop teacher said when I unpluged the MAF sensor and got more power. Just a thought. You might see the MPG drop a little bit, I did.

 

ok so what else can it be on that closed loop that is making it run bad? I could care less about the MPG if I can just get it running better soon

btw I know it cant go into that closed loop mode I should have said that a little better

 

can anybody tell me what parts are in the closed loop? Im about to need to go to a mechanic with this cuz its my only vehicle! please help

 

I'm confused.... you unplugged the TPS sensor, and you are puzzled as to why the engine doesn't run as well???? The PCM needs throttle position for several of its functions, including burst knock retard, PE mode timing, PE knock retard, PE activation, etc.

Maybe I misread what you wrote, but why are you trying to run without a TPS sensor?

 

no it actually started running better. I wanna know why that is and what other parts are in the involved in the closed operation of the motor. Im sure one of those are responsible for my motor running bad and all the other issues im having

 

also today while I was messing with it I tapped the wires going to the idle air control valve and the motor revved higher! I still have a high idle and bad running plus the left bank I have the a/f ratio gauge on is never showing lean! I dont know about the right up left is lean

 

I forgot to mention that today I was going and it started to act up. I was trying to get it to shift into second or third with the stall converter. I was trying to get to 3k and it didnt want to. I left off the gas and I heard the loudest back fire ever! I kept going and almost made it to my friends house and it started again.It was so bad that I had to pull over cuz I was loosing power bad and slowing down. I killed it and waited about 30 seconds and restarted it. I revved it up a few times and it didnt have any problems at all cept a alot of black smoke! I out it in gear and drove all the way there no problem.

I also did a set of NGK plugs this morning T4s so they are good and it was doing this before all that. Plus I did a set of copper header gaskets

 

you are running rich as hell thats for sure.

-Corey

 

have you actually checked both O2 sensors? what are they reading? a fouled O2 sensor will cause everything to go to hell.

 

I actually swapped out the right side O2 the other day thinking that might be it and it didnt help. No I havent checked both O2s

okI was messing with it after I posted last and I plugged in the tps again and started to unplug the injectors to see if one was stuck and they effected the motor the same. I was about to unplug the TPS again and I hit the wires going to the Idle Air Control Valve and it idled up over 2k and killed the remote start. I unplugged the IACV and restarted it and the idle was still high! Sounds like it might be stuck