CEL p0100, already searched forums

[jpphilli37]

my car gaves a CEL p0100 and p0420 when i took it to autozone.
it is running EXTREMELY rich and sometimes stalls when idling.
i am getting about 5mpg!
i have checked the MAF and it is good.
i also tested the injectors and did a compression test on the engine and they check out.
O2 sensor is good also.
what else could i check?


my car is a 99 gsx with injen intake

 

[DSMcamaro]

Are you venting your BOV? 5 MPGWTF , You sure about that? How did you check your MAF? I would try a differnt one If at all possible.

 

[laserspeeddemon]

When was the last time you ran a boost leak? A boost leak will cause the car to die at idle if its big enough. How fast the the car idling?

 

[tsimike97]

how long has it been doing this?? Did you use VFAQ to wire your AFC?? Just found out that VFAQ is wrong, and P0100 code clears for good when your AFC is wired correctly. A buddy of mine had the same problem. Let me know i can send you the correct wiring diagram.

 

[Meh987]

I would definitely do the boost leak test first. Also make sure your MAS didn't somehow come unplugged.

As for your P0420, it sounds like you have a bad (or no) coverter. And by looking at your profile, i see you have an N1 downpipe. That's what the P0420 code is from.