ozusa

Hi Folks,

Will someone please tell me the fuel pressure specification for my V6 engine? (PSI)

Is it measured with engine running or just ignition on?

I am interested because last week-end I replaced the engine air filters and now both banks are too lean. Codes P0171 and P0174.

It's probably a problem on the air side, not fuel, but I'd like to know the specs to check anyway.

Thank you!

desired_speeds

Its not unheard of that it throws a code of running lean when air filters are replaced. Just clear the code and reset mixture adaptation.

ozusa

Thanks for the reply. I had cleared the codes once already and they returned.

I don't know how to reset mixture adaptation.
(I have an Innova Equus 3130 OBD2 scan tool to get the codes)

I took out the MAF and cleaned it with the CRC MAF product and tried to have a go at cleaning the throttlebody with the CRC Throttebody cleaner.. I am not sure how successful the latter was, since I can't actually exercise the throttle (can I?)

This morning I put a bottle of STP injector cleaner in a new tank full of gas.

None of the above is necessarily going to help, but on 116,000 mile car, I don't think it will hurt to get an early Spring clean.

I have cleared the codes once again and I'm going to take it for a ride and see if they return.

Anyway, is resetting the mixture adaptation something I can do with the level of scan tool I have? Or is it a trip to someone with Startac?

Thanks again. I appreciate the comments.