So driving today my light came on after a hard acceleration from a stop.

I got a P0171 & P0174
banks are lean, cleared codes seems fine.

Any clue as to what can cause this ?

 

 

Thats kinda scary. even with 93 octane fuel it pings under load like a diesel so i back off abit till i dont hear it anymore till i get up to speed.

 

If your car is pinging on 93 octane, you probably do have a lean condition.

 

Could it be a failing maf ? useually they just work or dont work right ? there is not failing, it just goes at once ?

 

I found a small intake leak, fixed it , havent seen codes since i cleared them.

 

Seems i can smell a odd smell, it pigs really bad now, Light a heat smell like something is really hot, Iam replaced the sesors today, the came on yesterday but when i got in today it was off...... ill see what happens once i replace these.

 

Fix that oink oink smell.

jk...let us know the results

 

hahahaha did not notice that, i meant, "It Pings Really Bad"

 

So what would cause a lean condition ? knock sensor ? low fuel pressure? bad readings from the O2 Sensors ? Failing MAF ?/

 

So, I replaced the Front O2 Sensor 3 wire heated, No More codes, No More pinging at any load, Quicker throttle response, smoother starts, Feels like a new car, Tomorrow I'am replacing the other 2 just to be on the safe side. The old one had 128k miles on it.

 

The CODES Came BACK!!!! What the freak is causing this lean condition .................................................. .........

 

MAF

 

Cleaned the MAF with some CRC Maf cleaner, i had it sideways, made it sticking strait up and one person told me the goofy filter i have may be making the air flow past the maf all swirly and giving in accurate readings, so i straightened the maf and put a new filter on. so far so good, lets see how long it lasts.

 

Culprit, Vacuum leak, PCV valve grommet...... no more pinging, got alot more power also.

 

Nice! Did you just find it, or did you just forget to tell us a year ago?

 

Nah i just found it , i got under the hood real good and poked around everywhere.