Van kinda started running bad out of nowhere, noticed a gradual loss in power over a weeks time..now it's just running totally bad, wouldnt hardly take off from a stop having the push the had pedal farther then usual, bucking going to second gear.

It's a 2000 Chevy express van v6

Ran code with a basic scanner had code po101 and code po300 changed spark plugs because they didn't seem to be fouled even though they only have about a year or twos worth of use on them. Changed the maf sensor with a cheap one from carparts.com


Code po300 went away but now have codepo102

And the van still isn't running quite right...what could be the cause, maybe I need a oem sensor? Also I took the dog house off and noticed the pcv valve is pretty oily and rather dirty on the inside.. going to change it since I don't think it's been changed in atleast 6 or 7 years if ever.. also throttle bottle does have some oily residue on the inside but it isn't stuck. Also traced the connect that the plug ins for the msf sensor run to back to the ground it's look pretty dirty?

Could that dirty ground which appears to be right infront of the engine inside the cab if I'm talking about the correct ground be the cause?

 

vehicle? year? engine?

 

2000 Chevy express v6 vortec I think definitely a v6 2500 model
​modelIt's an old at&t fleet van with the shelves in the back if that makes a difference I know the electrical is a bit more robust and complicated in those versions of the 2500s

 

electrical is mostly the same.

Since the PCV has been puking oil into the intake, and since the trouble code is for MAF performance, I would start by cleaning the MAF.

https://www.obd-codes.com/p0102

 

Too late already change the maf and it wasnt very dirty looking. As said previously in the last post I already changed the maf but it's not oem. The code po102 is showing low electrical voltage or like you said performance...that's why I was asking if the ground wire being dirty could be the issue.. although this kind of came out of nowhere over the course of weeks.

 

 

so you did
well there's your problem

 

Idk I'll change it with an oem and see if you are indeed right.

 

you might be facing multiple issues. Basic misfire troubleshooting applies:
- check fuel pressure
- inspect and adjust distributor. They're known for arcing. Could be out of timing too (check retard with scan tool)
- check for spark on each plug
- make sure cat con isn't plugged up

 

i fixed the misfiring issue by changing the spark plugs. I only have the maf code...did you read the post??