So I've been getting this code (P0171 - bank 1 running lean) intermittently since the spring. The light will come on and then turn off 2 or 3 days later and stay off for around a week before it pops up again. When it first appeared, my mechanic ran a smoke test and I don't have any vacuum leaks. He also cleaned the MAF at that time. Fast forward to now and I got my bi-annual emission inspection notice so I'm going to go today since the light is off, but I'm not too confident that it will pass since the codes are still going to be in there.
Assuming I do need to fix this, I'm thinking my #1 culprit at this point is the WGA. I haven't gotten around to testing the old one because I really didn't want to take off the plastic underbody, but it looks like now is going to be that time.
First, is there any easy way to get at the vacuum line to test the WGA without removing the underbody?
Second, is there anything else I should be checking before I look at the WGA?
Finally, if the WGA is bad, should I go with the Forge unit (~$135) or the generic fixed boost one sold on Atpturbo.com (~$65)?
Background info: the car has ~108k miles on it and is bone stock save for a corksport exhaust (no cat) and new tokico illumina shocks & springs. In the last year my daily commute has changed from a ~50 mile round trip mostly interstate drive to a 6 mile round trip drive around small/slow streets (35mph limit) to the train station.
Assuming I do need to fix this, I'm thinking my #1 culprit at this point is the WGA. I haven't gotten around to testing the old one because I really didn't want to take off the plastic underbody, but it looks like now is going to be that time.
First, is there any easy way to get at the vacuum line to test the WGA without removing the underbody?
Second, is there anything else I should be checking before I look at the WGA?
Finally, if the WGA is bad, should I go with the Forge unit (~$135) or the generic fixed boost one sold on Atpturbo.com (~$65)?
Background info: the car has ~108k miles on it and is bone stock save for a corksport exhaust (no cat) and new tokico illumina shocks & springs. In the last year my daily commute has changed from a ~50 mile round trip mostly interstate drive to a 6 mile round trip drive around small/slow streets (35mph limit) to the train station.