jssblues

i am about to give up on this damn car, hell i could have had my old ford truck in showroom condition by now... i had no voltage going to passenger 02 sensor so i replaced it, now i get code 42....how can code 42 show up with a brand new 02 sensor?????? no matter what i do car wants to run rich... i have tried everything....fuel pressure is fine, still get code 84, 33, which i have already given up on, i think it is just embedded in my computer.
that i dont think is going to cause my massive hesitation at slight throttle, i think it is the fact that she is running rich....now what else could that problem be...fuel pressure fine, new 02 sensors, timing is fine i think, unless i am a tooth off which i highly doubt

DJ19895.0

I would check the wires that lead to the o2's. The connector could be bad or the wire could be bad. I am no expert, just my $.02.

93 LX FiveO

check the ground for the injectors on the back of the heads

i moved my ground to the firewall because it kept coming off

i also get the hesitation, check my thread and see if u got similar symptons

jssblues

my whole 02 harness is good, i took it out yesterday and checked, my ground is good

jssblues

i port matched my stock intake myself, is there any way maybe that messed something up cause i did not do it right, i matched it to the gasket and no more the best that i could, i feel i could have ported it out more

jssblues

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93 LX FiveO

if you're getting codes, theres a faulty sensor or bad ground somewhere.

you may have to put a dmm on the 02 wires to make sure they are switching.

jssblues

how do you go about testing to see if they are switching???????

jssblues

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Derf00

What type of o2 sensor did you get? OEM style or splice and dice? If you got a splice and dice you probably switched the wires or they are loose in the harness. With a code 33 you will run rich as the system does not go into closed loop emissions. It remains "Open" so the computer ignores O2 sensor input.

As for code 84 and 33 you probably already know those are Evap and EGR system codes as in vacuum and sensor related. Not fuel.
If you fix the code 42 you may also get rid of the other two.