P1283 Nissan - frontier

Question

For a nissan frontier 4.0 How do I test for Leaking exhaust, leaking intake, low fuel pressure. I've narrowed the problem to one of the three. Still getting code p1283 after replaces all O2 sensors, fuel sending unit and MAF sensor. Front two cats are brand new.

Please help!

Lisa

Answer 1

You can hear an exhaust leak and an intake leak if you know what you trying to hear 

I would start by cleaning the mass air flow sensor with mass air flow sensor cleaner.

and disconnect the battery for 30min to a hour to reset the computer and drive it and see if the code comes back.

if the code comes back I would check fuel pressure (you will need a fuel pressure line tester to connect to fuel line)

fuel pressure should be 51 psi at idle