Engine running rough, lights flickering, no oil pressure

[Josinglton73]

Hi all
In have a 04 3.7 V6 got it new had no problems with it till this past spring.
It started with a miss fire.
So replaces the plugs and the packs. Still ran rough.
A code for the map or MAF sensor showed
That the engine is getting to much fuel not enough oxygen.
Replaces the O2 and Map /MAF sensor
Still running rough, now lights are flickering and all of a sudden no oil pressure. Oil is in good range on the dip stick. Also replaces fuel rail and PCV.
Any clue to what is going on?

 

[tron67j]

I would check your electrical connections first, especially your grounds. Clean contact points on battery and grounding points and ensure no loose wires. Your wire going to O2 sensor could be bad. You replaced so much already including your MAF (mass air flow sensor) and things get funky when wires have been in same place for years and then moved to replace parts. The spread of problems elsewhere could be indicative of bad connections. Good luck.

 

[Josinglton73]

I’ll take a look at the O2 sensor wiring. For got to mention it was misfiring and it went away.

 

[Josinglton73]

also did notice when the engine heated up that I when the oil pressure dropped