Tuning question/Running lean 650-680

[radtech]

I recently added some upgrades like:
TT 95 octane street chip
HP fuel pump/hotwired
42lb inj.
Accufab adj fuel regulator set to 43 lbs(vac line off)
Stock Turbo set to 16-18 lbs(aftermarket guaged)

Car already had headers,CAI and test pipe in

My O2 readings are in the 650-680 range when I get on it. Seems to me, the 650-680 range is lean, but don't know if it could be fuel (from the chip I just had made) ulnless I need to change the fuel FILTER or maybe even my spark plug gap??? Seems that it shouldn't be a fuel delivery issue as I have just upgraded the fuel stuff(all but the filter). Thanks guys

 

[TurboBuRick]

Now you know whats coming right? Change the filter! :biggrin:

Also has the weather gotten alot cooler where your at? Colder weather tends to need more fuel.

Who's chip? Is it adjustable?

 

[Eric Stage I]

Also make sure the MAF reading is at 255 (or close to it) when at full boost. The MAF is "AF" on the scanmaster.

 

[radtech]

Hi Eric,
You burnt the chip for me w/42 lb inj.! Install was easy. I installed the Adj fuel guage, pump and injectors and the chip. I'll change the filter next and look at the MAF numbers(AF). I'll let you know tomorrow what happens. Thanks a bunch!!

 

[Chuck Leeper]

Also, while U R looking.. take a look at the FP and see if it's keeping up w/ the boost increases.