2G 2G Odd Idling and High Acceleration Issues

[Javte]

Hey, so I am having some issues that have honestly Stumped me. Whenever I first start the car after its been sitting for about an hour or more. Its idle will bounce from 2500 RPM to 2000 or high 1000, and will do that until I put it in drive and then itll go to idling fine once it is driven around.

Then when trying to accelerate relatively quick, once it hits 3000 RPM, it starts stuttering until i let of the gas and then itll let me climb higher. I am able to hit higher RPMS if i punch it a bit harder but that 3000 - 4000 range just feals weak and stuttery.

I do have 2 codes being the P1105 (Fuel Pressure Up Solenoid) and P0135 (O2 Heater Circuit Bank 1 Sensor 1). Which i am working on getting fixed, but I'm just not sure if those symptons would fall under those faults.

 

[pauleyman]

you've already figured out you have codes. If you have the ability to datalog you can see if the o2 is actually working or not. Heater won't necessarily keep it from functioning but at first start it will be slow. The upper RPM issues you have could be a multitude of things. What have you checked? Spark plugs? Wires? Coils? Injectors? Fuel pressure? Give us some info please. Where are you in the diagnostic process currently.

 

[chrysler kid]

Erratic idle could be several things. First replace the front oxygen sensor

Second could be a vacuum leak after the mass air flow sensor, or unhooked vacuum line

The fuel pressure solenoid only triggers a code if it is unhooked from the electrical connector or showing bad resistance readings meaning the sensor is bad. Should not affect any functions of the car